Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at s√ = 8 TeV

JHEP08(2020)051 Published for SISSA by Springer Received:May 7, 2020 Accepted:June 29, 2020 Published:August 12, 2020 Combination of the W boson polarization measurements in top quark decays using ATLAS and CMS data at √s=8 TeV The ATLAS and CMS collaborations E-mail: [email protected], [email protected] Abstract: The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of about 20 fb−1for each experiment. The measurements used events containing one lepton and having different jet multiplicities in the final state. The results are quoted as fractions of W bosons with longitudinal (F0), left-handed (FL), or right-handed (FR) polarizations. The resulting combined measurements of the polarization fractions are F0= 0.693 ±0.014 and FL= 0.315 ±0.011. The fraction FRis calculated from the unitarity constraint to be FR=−0.008 ±0.007. These results are in agreement with the standard model predictions at next-to-next-to-leading order in perturbative quantum chromodynamics and represent an improvement in precision of 25 (29)% for F0(FL) with respect to the most precise single measurement. A limit on anomalous right-handed vector (VR), and leftand right-handed tensor (gL, gR) tWb couplings is set while fixing all others to their standard model values. The allowed regions are [−0.11,0.16] for VR, [−0.08,0.05] for gL, and [−0.04,0.02] for gR, at 95% confidence level. Limits on the corresponding Wilson coefficients are also derived. Keywords: Hadron-Hadron scattering (experiments), Top physics ArXiv ePrint: 2005.03799 Open Access, Copyright CERN, for the benefit of the ATLAS-CMS Collaboration. Article funded by SCOAP3. https://doi.org/10.1007/JHEP08(2020)051 JHEP08(2020)051 Contents 1 Introduction 1 2 The ATLAS and CMS measurements 3 2.1 The ATLAS measurement 3 2.2 The CMS measurements 4 2.3 The W boson polarization values from the input measurements 5 3 Sources of systematic uncertainty 6 3.1 Limited size of the data and simulated samples, backgrounds, and integrated luminosity 6 3.2 Detector modelling 7 3.3 Signal modelling 11 4 Correlations and uncertainties in the ATLAS and CMS measurements 13 4.1 Correlations 13 4.2 Correlation choices for the partially correlated uncertainties 16 4.3 Summary of the uncertainties and correlations of the input measurements 17 5 Results 17 5.1 Stability tests 20 5.2 Limits on anomalous couplings 21 6 Summary 23 The ATLAS collaboration 30 The CMS collaboration 47 1 Introduction The large number of top quarks produced at the CERN LHC provides an excellent laboratory for the study of their production and decay properties. Precise predictions of some of these properties are available in the standard model (SM) of particle physics, and are tested through detailed comparisons to data. Potential deviations between data and predictions could reveal important information on the existence of new physics beyond the SM. The properties of the top quark decay vertex tWb are governed by the structure of the weak interaction. In the SM, this interaction has a V−Astructure, where Vand Arefer to the vector and axial-vector components of the weak current. This structure, along with the masses of the particles involved, determines the fractions of – 1 – JHEP08(2020)051 W bosons with longitudinal (F0), left-handed (FL), and right-handed (FR) polarizations, referred to as polarization fractions. Theoretical calculations at next-to-next-to-leading order (NNLO) in perturbative quantum chromodynamics (QCD) predict the fractions to be F0= 0.687 ±0.005, FL= 0.311 ±0.005, and FR= 0.0017 ±0.0001 [1], assuming a top quark mass of 172.8±1.3 GeV. Thus, the SM predictions can be tested in high-precision measurements of the polarization fractions, and potential new physics processes that modify the structure of the tWb vertex can be probed. Experimentally, polarization fractions can be measured in events containing top quarks, using the kinematic properties of its decay products. For semileptonically decaying top quarks, i.e. t →W(→`ν)b (with lepton `= electron, muon, or τ), the polarization angle θ∗is defined as the angle between the direction of the charged lepton and the reversed direction of the b quark, both in the rest frame of the W boson. The distribution of the variable cos θ∗is particularly sensitive to the polarization fractions. The differential decay rate is given by 1 Γ dΓ d cos θ∗=3 41−cos2θ∗F0+3 8(1 −cos θ∗)2FL+3 8(1 + cos θ∗)2FR.(1.1) In a similar way, θ∗can be defined for the hadronically decaying top quarks, i.e. t →W(→ q0q)b, by replacing the charged lepton with the down-type quark (q0). In the measurements used in this paper, only angles from top quarks decaying semileptonically to electrons or muons are considered. Imposing a unitarity constraint between the three polarization fractions, F0+FL+FR= 1, results in two independent observables. The W boson polarization fractions have been measured in proton-antiproton collisions by the CDF and D0 experiments [2] at a centre-of-mass energy of 1.96 TeV with experimental uncertainties of 10–15% in F0and FL. The ATLAS and CMS collaborations have performed measurements at the LHC in proton-proton (pp) collisions at √s= 7 [3,4] and 8 [5–7] TeV, reaching a precision in F0and FLof 3–5%. All measurements are in agreement with the SM NNLO predictions within their experimental uncertainties. However, these experimental uncertainties are larger than those of the current theoretical predictions, which are less than 2%. Improving the experimental precision motivates the combination of the ATLAS and CMS measurements: combining measurements based on independent data sets reduces the statistical uncertainty, while the overall uncertainty can be further decreased by exploiting the differences in experimental systematic effects stemming from the use of the two detectors and different analysis methods. This paper describes the combination of the W boson polarization fractions measured by the ATLAS and CMS collaborations based on data collected at √s= 8 TeV, in final states enhanced in top quark pair (tt) [5,6] and single top quark [7] production processes. The paper is structured as follows: the measurements included in the combination are briefly described in section 2. Section 3lists the sources of systematic uncertainty considered in the input measurements. The correlations between the measured values included in this combination are categorized in section 4, and presented for each source of systematic uncertainty. In section 5, the results of the combination and their interpretation in terms of new physics using the effective field theory approach are described. A summary and conclusions are presented in section 6. – 2 – JHEP08(2020)051 2 The ATLAS and CMS measurements Three measurements of the W boson polarization in the top quark decay from top quark pair production events in the `+jets channel and one from events with a single top quark signature are the four input measurements in this combination. The measurements based on tt production events were performed by the ATLAS [5] and CMS [6] experiments, where the latter was separated in electron and muon channels. The measurement from events with a single top quark signature was performed by the CMS [7] experiment. The measurements were based on pp collision data at √s= 8 TeV, corresponding to integrated luminosities of 20.2 and 19.7 fb−1for the ATLAS and CMS experiments, respectively. The 7 TeV measurements [3,4] are not included in this combination since they are based on smaller data sets, and, having relatively large systematic uncertainties, their contribution to the combination is expected to be marginal. All measurements were based on fits where the polarization fractions were adjusted to describe the observed cos θ∗distributions of the semileptonically decaying top quark, taking into account the SM predictions for the backgrounds. These measurements are summarized in the rest of the section. Detailed descriptions of the ATLAS and CMS detectors can be found elsewhere [8,9]. 2.1 The ATLAS measurement The contributing input from the ATLAS experiment to this combination is described in ref. [5] and denoted “ATLAS” in the following. In this measurement, the event selection was defined to efficiently select events from top quark pair decays in the `+jets channel, i.e. exactly one reconstructed electron or muon and at least four jets, of which at least two were tagged as b jets, and minimizing background contributions, e.g. from W/Z+jets and multijet productions. The latter corresponds to events including jets misidentified as leptons, or non-prompt leptons from hadron decay passing the `+jets selection. The tt system was fully reconstructed via a kinematic likelihood fit technique [10], which maps the four decay quarks (two b quarks and two light quarks from the W boson decay) to four reconstructed jets, utilising Breit-Wigner distributions for the W boson and top quark masses, as well as transfer functions to map the reconstructed jet and lepton energies to the parton or true lepton level, respectively. The W boson polarization was measured in the single-lepton channels from tt events using a template fit method. Dedicated tt templates of the cos θ∗distribution for each polarization configuration were produced by reweighting the simulated SM tt events. Additional templates for background processes were also produced. The templates were fit to the cos θ∗distribution in data using different templates for the electron and muon channels, via a binned likelihood fit as: L= nbins Y k=1 Nexp(k)Ndata(k) hNdata(k)i! exp [−Nexp(k)] nbkg Y j=1 1 √2πσbkg,j exp −(Nbkg,j −ˆ Nbkg,j)2 2σ2 bkg,j !, (2.1) where Ndata(k) and Nexp(k) represented the number of observed and the total number of expected events (sum of signal and background events) in each bin kof the cos θ∗distri- – 3 – JHEP08(2020)051 bution, respectively. The number of events for each background source jis represented by Nbkg,j. The expected number of events for each background source j,ˆ Nbkg,j, and the uncertainties in the normalization of the background events, σbkg,j, were used to constrain the fit. Therefore, the uncertainties in the polarization fractions obtained from the fit included both the statistical and systematic uncertainties in the background normalizations. The final result was obtained by a simultaneous fit of the electron and muon channel templates to the data. A common parameter was used to scale each of the backgrounds in the electron and muon channel in a fully correlated manner, except in the case of the nonprompt-lepton background for which two separate, uncorrelated, parameters were used. The contribution from W+jets events was split into different quark flavour samples and scaled by the calibration factors derived from sidebands in data. These procedures were found to cover the corresponding shape uncertainties in the nonprompt-lepton and W+jets contributions. The uncertainty in the shape of the contributions from single top quark and diboson events was found to be negligible. 2.2 The CMS measurements Three CMS measurements contribute to this combination. The results presented in ref. [6] used similar final states to those in ATLAS: one lepton and four or more jets, of which at least two were tagged as b jets. The tt system was fully reconstructed using a constrained kinematic fit. The unmeasured longitudinal momentum of the neutrino was inferred by the kinematic constraints. The measurement was performed by maximizing the binned Poisson likelihood function, L= nbins Y k=1 Nexp(k)Ndata(k) hNdata(k)i! exp [−Nexp(k)],(2.2) where Ndata(k) is the number of observed events in each bin kof the reconstructed cos θ∗distribution, and Nexp(k) is the number of expected events from Monte Carlo (MC) simulation for a given polarization configuration ~ F≡(F0, FL, FR), including signal and background events. During each step of the maximization, Nexp(k) was modified for different values of the polarization fractions ~ Fusing a reweighting procedure based on eq. (1.1). Weights are applied to the events at the generated level, so that the cos θ∗distribution generated according to eq. (1.1) corresponds to alternative values of ~ F. Backgrounds that did not involve a top quark did not change Nexp(k) for different values of ~ F. The ATLAS and CMS measurements considered the variations on Nexp(k) coming from all top quark events passing the selection, either `+jets or non-`+jets, including τ+jets and dilepton tt processes. In addition, the CMS analyses took into account the variations arising from single top quark processes, which were treated as a background in the ATLAS measurement. The normalization of the tt process was left free in the fit. In order to allow a more detailed account of the correlations with the other measurements, the two lepton channels, e+jets and µ+jets, enter the combination as two separate measurements, referred to as “CMS (e+jets)” and “CMS (µ+jets)” throughout this paper, respectively. In the ATLAS measurement, the fractions were obtained simultaneously using the events from the two channels, therefore this separation is not available. – 4 – JHEP08(2020)051 The third CMS input [7] included in the combination used a final state targeting tchannel single top quark topologies instead of tt events. The event selection required exactly one electron or muon, and exactly two jets, one of which was tagged as a b jet. This selection is orthogonal to that of the CMS (e+jets) and CMS (µ+jets) analyses, making the three of them statistically independent. Nevertheless, while the expected amount of selected t-channel single top quark events corresponded to only about 13% of the sample, the expected contribution from the tt process amounted to about 35%, and needed to be taken into account as part of the signal. The largest background came from the W+jets process. This contribution was fully estimated from data, and corresponded to about 36% of the selected sample. Other processes, such as multijet and Z+jets production, accounted for the remaining 16% of the sample. The fitting procedure applied in ref. [6] was slightly modified for the single top quark topology measurement. In this case, because of the different background composition with respect to the tt analysis, the normalizations of the single top quark and tt processes were fixed according to their predicted cross section values. On the other hand, the normalization of the W+jets sample was left free in the fit to be adjusted simultaneously with the F0and FLfractions, and treated independently in the e+jets and µ+jets channels. Moreover, the fractions were extracted by maximizing a combined likelihood function, constructed from the two likelihood functions of the electron and muon channels, taking into account the correlations between them. Therefore, although based on two single-lepton channels, this measurement contributes to the combination as one single input, denoted as “CMS (single top)” in the following. 2.3 The W boson polarization values from the input measurements The polarization fractions from the input measurements before applying the modifications concerning the combination (as discussed in section 3), and their uncertainties are summarized in table 1. The first quoted uncertainty in the ATLAS measurement includes the statistical uncertainties and uncertainties in the background determination, and the second uncertainty refers to the remaining systematic uncertainty. For CMS measurements, the first uncertainty is statistical, while the second is the total systematic uncertainty, including that on background determination. In order to harmonize the treatment of the systematic uncertainties evaluation across the input measurements, some of them are modified before performing the combination process. The following modifications are applied (as detailed in section 3): •The uncertainty values in the ATLAS measurement are symmetrized. •The tt modelling uncertainties in the CMS (e+jets) and CMS (µ+jets) measurements are recalculated without the contributions from the limited number of events in the samples used to estimate them. •The uncertainty due to the top quark mass used in the ATLAS measurement is increased from a variation of ±0.7 GeV to ±1.0 GeV. – 5 – JHEP08(2020)051 Measurement F0FLFR ATLAS (`+jets) 0.709 ±0.012 ±0.015 0.299 ±0.008 ±0.013 −0.008 ±0.006 ±0.012 CMS (e+jets) 0.705 ±0.013 ±0.037 0.304 ±0.009 ±0.020 −0.009 ±0.005 ±0.021 CMS (µ+jets) 0.685 ±0.013 ±0.024 0.328 ±0.009 ±0.014 −0.013 ±0.005 ±0.017 CMS (single top) 0.720 ±0.039 ±0.037 0.298 ±0.028 ±0.032 −0.018 ±0.019 ±0.011 Table 1. Summary of the published ATLAS and CMS measurements for 8 TeV data. The first quoted uncertainty in the ATLAS measurement includes statistical uncertainties and uncertainties in the background determination, and the second uncertainty refers to the remaining systematic contribution. For CMS measurements, the first uncertainty is statistical while the second is the total systematic uncertainty, including that on background determination. 3 Sources of systematic uncertainty The effects of various systematic uncertainties on the input results were studied individually for each measurement. In the ATLAS measurement, the impact of systematic uncertainties was evaluated with alternative pseudo-data distributions built from the altered signal and background contributions. The alternative pseudo-data distributions were produced by varying each source of systematic uncertainty by one standard deviation (±1σ). The CMS measurements also used pseudo-data to estimate the uncertainties due to parton distribution functions (PDFs), size of the simulated samples, and single top quark analysis specific uncertainties. The other uncertainties were estimated by replacing the nominal sample with alternative samples containing simulated events modified according to each of the systematic variations, and repeating the fit. As the algorithm used to perform the combination accepts only symmetric uncertainties (more details in section 5), the uncertainties in the ATLAS measurement are symmetrized by assigning the average uncertainty value between the up and down variations in each uncertainty source. A test is performed by replacing the average uncertainty value with the largest shift among the up and down variations. No variation in the combination results is observed, i.e. the central values of the polarization fractions, combination uncertainty, and total correlation remain unchanged. In addition, common uncertainty categories are established by merging and regrouping various uncertainties in each individual input measurement. In the following, the categorization of the systematic uncertainties considered for the combination is presented. The categories, assumed to be independent from each other, comprise sources of uncertainties that have similar origins, easing the treatment of correlations discussed in section 4. 3.1 Limited size of the data and simulated samples, backgrounds, and integrated luminosity Statistical uncertainty, background determination, and integrated luminosity (stat+bkg). The uncertainties in the ATLAS measurement from the fit included both the statistical uncertainty in the data and the systematic uncertainty in the background normalizations – 6 – JHEP08(2020)051 via priors for the background yields. The shape of the multijet processes was determined from data, while for the other background events it was fully determined from simulation. The impact of the 1.9% integrated luminosity uncertainty [11] was found to be negligible because of the background normalization treatment in the fit. In the CMS measurements, the uncertainties in the expected backgrounds included shape and normalization effects, and were estimated by varying them separately within their uncertainties and repeating the measurement. The multijet background in all CMS measurements as well as the normalization of the W+jets contribution in the CMS (single top) case were derived exclusively from data. All other background processes, as well as tt, and single top quark processes in the CMS (single top) measurement were estimated using simulation, normalized to the integrated luminosity of the data samples. These were affected by the uncertainties in their predicted cross sections, and the integrated luminosity determination. The CMS integrated luminosity uncertainty of 2.6% [12] had a sizeable effect only on the CMS (single top) measurement. Size of simulated samples. This category accounts for the limited number of simulated events for the nominal samples in all input measurements. Both ATLAS and CMS evaluated this uncertainty by performing pseudo-experiments. In the CMS (e+jets) and CMS (µ+jets) measurements, the limited number of simulated events was also considered for the tt samples used for the estimation of the modelling uncertainties. In order to perform a consistent combination, the tt modelling uncertainties in the CMS (e+jets) and CMS (µ+jets) measurements are recalculated without the contributions from the limited number of events in the samples used to estimate them. The impact of this modification on the relative uncertainty in the measurements is found to be in the order of O(10−4). 3.2 Detector modelling Jets. In all input measurements in this combination, the same jet clustering algorithm, the anti-kTalgorithm [13,14], was used, with the radius parameter R of 0.4 and 0.5 for the ATLAS and CMS experiments, respectively. However, in the ATLAS measurement the jets were built from energy deposits in the calorimeter [15], while in the CMS analyses they were reconstructed from particle-flow [16] objects. Thus, the two experiments used different calibration procedures and uncertainties for jets. The following categories comprise various sources of uncertainty related to the reconstruction and energy calibration of jets. •Jet energy scale (JES): the JES uncertainty in the ATLAS and CMS analyses was composed of different uncertainty sources, such as jet flavour dependence, the additional interactions in the same or nearby bunch crossings (pileup), calibrations from Z+jets or γ+jets processes, and other components. In general, these components have different level of correlations among the two experiments and have been used to evaluate the total JES correlation (as detailed in section 5.1). The final JES uncertainty used in this combination is quoted in tables 2–4and results from grouping all JES uncertainty components into a single number. •Jet energy resolution (JER): this category includes contributions due to the uncertainties in the modelling of the jet energy resolution. The momenta of the jets in – 7 – JHEP08(2020)051 ATLAS F0FLρATLAS(F0, FL) Measured value 0.709 0.299 Uncertainty category Samples size and background determination Stat+bkg 0.012 0.008 −1.00 Size of simulated samples 0.009 0.006 −1.00 Detector modelling JES 0.005 0.003 −0.94 JER 0.006 0.003 −0.92 JVF 0.003 0.002 −0.99 Jet reconstruction efficiency <0.001 <0.001 −1.00 Lepton efficiency 0.004 0.002 −0.99 b tagging 0.002 0.001 −0.84 Pileup n.a. n.a. n.a. Signal modelling Top quark mass 0.002 0.007 −1.00 Simulation model choice 0.003 0.004 0.99 Radiation and scales 0.003 0.006 −0.91 Top quark pTn.a. n.a. n.a. PDF 0.003 0.004 −1.00 Single top method n.a. n.a. n.a. Total uncertainties Systematic uncertainty 0.014 0.013 −0.82 Total uncertainty 0.019 0.015 −0.80 Table 2. Uncertainties in F0,FLand their corresponding correlations from the ATLAS measurement. The uncertainty that is not applicable to this measurement, or which is included in other categories, is indicated by “n.a.”. The line “Systematic uncertainty” represents the quadratic sum of all the systematic uncertainty sources except for the uncertainty in the background determination, which is included in the “Stat+bkg” category. The quoted correlation values are obtained via the procedures described in section 4.1. simulation were smeared so that the jet energy resolution in simulation agrees with that in data. Both experiments used a similar method to estimate this uncertainty. •Jet vertex fraction (JVF): to suppress jets from pileup, in the ATLAS measurement jets were required to fulfil the JVF criterion. The corresponding uncertainty was eval- – 8 – JHEP08(2020)051 ATLAS+CMS combination F0FL Fractions 0.693 0.315 Uncertainty category Samples size and background determination Stat+bkg 0.009 0.006 Size of simulated samples 0.005 0.003 Detector modelling JES 0.004 0.002 JER 0.004 0.002 JVF 0.001 0.001 Jet reconstruction <0.001 <0.001 Lepton efficiency 0.002 0.001 b tagging 0.001 0.001 Pileup <0.001 <0.001 Signal modelling Top quark mass 0.003 0.004 Simulation model choice 0.006 0.005 Radiation and scales 0.005 0.004 Top quark pT0.001 0.002 PDF 0.001 0.001 Single top method 0.001 <0.001 Total uncertainty 0.014 0.011 Table 7. Results of the ATLAS and CMS combination: W boson polarization fraction values and uncertainties. The combined F0and FLvalues are anticorrelated, with ρ=−0.85. This group of correlations is denoted in this document as ρATLAS,ρe+jets CMS ,ρµ+jets CMS , and ρst CMS for the ATLAS, CMS (e+jets), CMS (µ+jets), and CMS (single top) measurements, respectively. •Correlations between measurements within the CMS experiment: for each source of systematic uncertainty, the correlations between the polarization fractions in the CMS (e+jets) and CMS (µ+jets) measurements are denoted ρe,µ+jets CMS (Fi, Fj), where i and j stand for 0 or L. The correlations between CMS (single top) and CMS (e+jets) are assumed to be the same as those between the CMS (single top) and CMS (µ+jets) measurements for each source of the uncertainty, and are denoted generically ρst,`+jets CMS (Fi, Fj). The relations ρCMS(F0, F0) = ρCMS(FL, FL) = −ρCMS(F0, FL) – 15 – JHEP08(2020)051 are assumed in all CMS measurements. In this hypothesis, the strong anti-correlation observed for F0and FLwithin the same measurement (as described above) is assumed to hold also across different measurements. The uncertainties associated with the limited size of the data and simulated samples, and background estimation are assumed to be uncorrelated (as also discussed in sections 4.2 and 5.1). The lepton efficiency uncertainty is assumed to be uncorrelated between the CMS (e+jets) and CMS (µ+jets) measurements, and partially correlated with the CMS (single top) measurement. All other sources of uncertainty are assumed to be fully correlated. •Correlations between the ATLAS and CMS experiments: for each source of systematic uncertainty, the correlation between the measured polarization fractions Fiby the ATLAS and CMS experiments, ρ(FATLAS i, FCMS j) is presented by ρLHC(Fi, Fj), where ρLHC(F0, F0) = ρLHC(FL, FL) = −ρLHC(F0, FL) are assumed. The uncertainties associated with the detector modelling (except for the JES) as well as the method-specific uncertainty are assumed to be uncorrelated, i.e. ρLHC(F0, F0) = 0. The uncertainty associated with the radiation and scales, and the JES are assumed to be partially correlated with ρLHC(F0, F0) estimated to be 0.5 and 0.2, respectively (see sections 4.2 and 5.1 for details). All other sources of uncertainty are assumed to be fully correlated, i.e. ρLHC(F0, F0) = +1. 4.2 Correlation choices for the partially correlated uncertainties Although the correlations between the measurements are well known for most of the systematic uncertainty sources, some of them, in particular those that are partially correlated, are not very accurately determined. This section describes how these values are estimated for the combination. Stability tests are performed to verify the robustness of the combination against these correlation assumptions, as discussed in section 5.1. In the CMS measurements, the uncertainties in the background determination (shape and normalization), integrated luminosity, and the statistical uncertainty were estimated independently and grouped into a single uncertainty category (stat+bkg) for coherence with the ATLAS treatment. The major components of the stat+bkg category in the CMS (e+jets) and CMS (µ+jets) measurements are the uncertainty in the determination of the background events from multijet and W+jets production. The former is estimated from data, and therefore uncorrelated between all CMS measurements, while W+jets production, as well as the other minor backgrounds are estimated from simulation, and therefore at least partially correlated between the measurements. For the CMS (single top) case, the major component of this category is the statistical uncertainty, which is uncorrelated with the other measurements. The normalization of W+jets production, a major background in the CMS (single top) analysis, is estimated from data, and therefore it is uncorrelated to the other CMS measurements. On the other hand, the W+jets production shape, as well as the modelling of other background event sources and signal events, rely on simulation, which may lead to a nonzero ρst,`+jets CMS (Fi, Fi) correlation. Neglecting the small correlations – 16 – JHEP08(2020)051 that could arise from the W+jets production shape and the background modelling from simulation, the values ρe,µ+jets CMS (Fi, Fj) = 0 and ρst,`+jets CMS (Fi, Fi) = 0 are assumed for the combination, and the impact of this assumption is studied via the stability tests. In all ATLAS and CMS measurements, the JES systematic uncertainty is estimated from different components, which are characterized by different levels of correlations among the two experiments. These components are categorized as fully correlated, such as gluoninitiated jet fragmentation; partially correlated, such as modelling uncertainties from in situ techniques, such as Z-jet, γ-jet, and multijet balance techniques; and uncorrelated, such as statistical and detector-related uncertainties. These correlations have been evaluated and are described in ref. [42]. In the ATLAS measurement, the contribution from the uncorrelated (partially correlated) components to the total JES uncertainty is found to be about 70 (20)%, and the total JES uncertainty is dominated by the uncorrelated jet flavour composition component. In the CMS measurements, because JES uncertainties are small, the breakdown into components was not done. Therefore, assuming a similar JES uncertainty composition between the two experiments, the value of ρLHC(Fi, Fi) is found to be 0.2. In the ATLAS and CMS analyses, different approaches were used to estimate the radiation and scales uncertainties, as described in section 3.3. In the CMS (single top) measurement, this uncertainty is estimated by varying the scales µRand µFfor the simulations of both the tt and the single top quark processes. While the tt component, which is dominant, is fully correlated to the analogous uncertainties in the ATLAS, CMS (e+jets), and CMS (µ+jets) measurements, the smaller component from the single top quark µR and µFscales is uncorrelated with the other measurements. Since the effects being studied are the same, but the methods are different, the values of ρLHC(Fi, Fi) and ρst,`+jets CMS (Fi, Fi) are not well known, and are assumed to be 0.5 and 1.0, respectively. 4.3 Summary of the uncertainties and correlations of the input measurements For each systematic uncertainty category, the correlations between the measured polarization fractions for the input measurements are given in table 6. A breakdown of the uncertainties in the input measurements of F0and FLas well as their correlations, are presented in tables 2–4. The uncertainties are grouped according to the categories listed in section 3. Figure 1presents the total correlation values between the input measurements. Typically, F0and FLare highly anticorrelated within the same measurement. The three tt measurements (ATLAS, CMS (e+jets), and CMS (µ+jets)) are also correlated or anticorrelated, with the absolute values of the correlations ranging around 30 to 40%. The correlations of the CMS (single top) measurement with the CMS (e+jets) and CMS (µ+jets) measurements are around 20% in the absolute value, and are generally smaller with the ATLAS measurement. 5 Results The combination is performed by finding the best linear unbiased estimator (BLUE) [43,44] with the method implemented in ref. [45]. The BLUE method finds the coefficients of the – 17 – JHEP08(2020)051 1.00 0.15 1.00 0.17 0.39 1.00 0.07 0.15 0.31 1.00 -0.80 -0.32 -0.37 -0.16 1.00 -0.17 -0.87 -0.47 -0.18 0.36 1.00 -0.16 -0.39 -0.78 -0.26 0.37 0.47 1.00 -0.09 -0.19 -0.35 -0.92 0.20 0.22 0.31 1.00 ATLAS 0 F CMS(e+jets) 0 F +jets) µ CMS( 0 F CMS(single top) 0 F ATLAS L F CMS(e+jets) L F +jets) µ CMS( L F CMS(single top) L F ATLAS 0 F CMS(e+jets) 0 F +jets)µ CMS( 0 F CMS(single top) 0 F ATLAS L F CMS(e+jets) L F +jets)µ CMS( L F CMS(single top) L F 0.8− 0.6− 0.4− 0.2− 0 0.2 0.4 0.6 0.8 1 ATLAS+CMS WGtopLHC -1 20.2 fb− = 19.7 int L = 8 TeVs Figure 1. The total correlation between the input measurements of the combination. linear combination of the input measurements by minimizing the total uncertainty of the combined result, taking into account both the statistical and systematic uncertainties, as well as the correlations between the inputs. In this analysis, the measurements of F0and FL are combined while FRis obtained as FR= 1 −F0−FL. As no further constraints on the observables were placed, values outside the range [0, 1] are allowed for the three polarization fractions. The total correlation between F0and FLobtained from the combination is taken into account in the estimation of the uncertainty in the FRvalue. The results of the combination of the polarization fractions measurements are F0= 0.693 ±0.009 (stat+bkg) ±0.011 (syst), FL= 0.315 ±0.006 (stat+bkg) ±0.009 (syst), with a total correlation of −0.85. Using the unitarity constraint on the polarization fractions, the fraction of events with a W boson with right-handed polarization is calculated to be FR=−0.008 ±0.005 (stat+bkg) ±0.006 (syst), – 18 – JHEP08(2020)051 Figure 2. Overview of the four measurements, as well as the results of the combination. The inner and outer error bars correspond to the statistical and the total uncertainties, respectively. The inner bars for the combination include also the background determination uncertainties. The vertical solid line indicates the predictions of NNLO QCD calculations [1]. where the first quoted uncertainty includes the statistical part and uncertainties in the background determination, and the second uncertainty refers to the remaining systematic contribution. From these results, an upper limit of FR<0.007 at 95% confidence level (CL) is set. The limit is set using the Feldman-Cousins method [46], considering that FR follows a normal distribution, and that it is physically bound to FR≥0. The relative uncertainty on F0and FLis 2.0 and 3.5%, respectively, including systematic and statistical components. Figure 2shows an overview of the four measurements included in the combination and the result of the combination together with the polarization fractions predicted by NNLO QCD calculations. The uncertainties in the NNLO predictions, presented with vertical bands, include an uncertainty of 1.3 GeV in the top quark mass, uncertainties in the b quark and W boson masses, and in αS. The combined FRvalue is negative, as this is not explicitly forbidden in the combination, but compatible with the predictions within the uncertainties. The measurements are consistent with each other and with the NNLO QCD prediction. The χ2and upper tail probability of the combination are 4.3 and 64% respectively. The combination includes four sets of measurements, each composed of two highly anticorrelated observables, and two fit parameters of the combination, i.e. the combined F0 and FL. A detailed breakdown of the uncertainties is presented in table 7. The dominant uncertainties are those arising from the statistical uncertainty on data and background estimation (stat+bkg), followed by the uncertainties in the radiation and scales modelling, the limited size of the simulated samples, and simulation model choice. The total detector modelling uncertainty is minor, smaller than the uncertainties in the stat+bkg category. The measurement with the highest impact in the determination of F0is ATLAS, while CMS – 19 – JHEP08(2020)051 (µ+jets) dominates the combined FLdetermination. The impact of the CMS (e+jets) and CMS (µ+jets) measurements is not directly comparable to the other input measurements that already include the electron and muon channels together. As a test, the combination is repeated, using a pre-combined CMS (e+jets) + CMS (µ+jets) input, and the results are unchanged. The ATLAS+CMS combined fractions and uncertainties are identical in both cases, with a small variation on the resulting (F0,FL) correlation, being 1.5% smaller for the cross-check combination. In another test, the CMS (single top) measurement was removed from the combination. The impact on the combined fractions and uncertainties is less than 1.5%. The combination yields an important improvement in precision, as compared to the most precise individual published measurements [5,6]. Improvements of 25 and 29% relative to the most precise single measurement are found for the precision of the combined measurements of F0and FL, respectively. The improvement is estimated with respect to the published values of the W boson polarization fraction determination that is given in table 1. The total correlation between the combined fractions is similar to those in the input measurements, and their uncertainties are smaller. These two factors lead to a combined right-handed polarization fraction FRthat is almost a factor two more precise than in previous publications. 5.1 Stability tests The hypotheses assumed for the correlations between the measurements, as defined in sections 4.1 and 4.2, are based on the best knowledge of the similarities and differences in the detectors, analysis methods, and simulations used in each measurement. Nevertheless, some of these correlations cannot be precisely determined. The checks described in this section are performed to test the stability of the results against this potential lack of knowledge. ρLHC(Fi, Fi)hypothesis (with i= 0, L) for the JES uncertainty. The correlation value ρLHC(Fi, Fi) = 0.2 was estimated according to the prescription given in ref. [42] and the description in section 4.2. The impact of this assumption is evaluated by repeating the combination by varying ρLHC(Fi, Fi) in the interval between 0.0 and 0.4, in steps of 0.1. The fraction values and uncertainties remained unchanged in the entire probed range. The χ2of the fit, the probability, and the total (F0,FL) correlation are found to be stable with a relative shift of less than 0.5%. ρLHC(Fi, Fi)and ρst,`+jets CMS (Fi, Fi)hypotheses for the radiation and scales uncertainties. Although addressing similar effects, the radiation and scales uncertainties are estimated in three different ways for ATLAS, CMS (single top), and the other CMS measurements, with different levels of correlations among them. Therefore, the two hypotheses, ρLHC(Fi, Fi) = 0.5 and ρst,`+jets CMS (Fi, Fi) = 1, are tested simultaneously, by variation in steps of 0.1 in the interval between 0 and 0.5 for ρLHC(Fi, Fi) and between 0.6 and 1.0 for ρst,`+jets CMS (Fi, Fi). The resulting polarization fraction mean values and uncertainties remained unchanged in the whole ranges. Small variations, below the percent level, are observed for the total correlation and fit probability. – 20 – JHEP08(2020)051 JES versus radiation and scales correlations. Since the JES and radiation and scales uncertainties are among the dominant sources of uncertainty with significant correlation between measurements, an additional test was performed varying the two correlation hypotheses simultaneously, rather than separately. The results of this test also show stable combination with maximum relative shifts of about 2% for the χ2and probability and about 0.6% for the total correlation. The combined fractions and uncertainties are found to be stable, with negligible variations for all probed hypotheses. ρe,µ+jets CMS (Fi, Fi)and ρst,`+jets CMS (Fi, Fi)hypothesis for statistical+background uncertainty. Small correlations that could arise from the background modelling from simulated samples are neglected in the combination by assuming ρe,µ+jets CMS (Fi, Fi) = 0 and ρst,`+jets CMS (Fi, Fi) = 0. In order to investigate the effect of these hypotheses, the combination was repeated by varying ρe,µ+jets CMS (Fi, Fi) and ρst,`+jets CMS (Fi, Fi), using for both the same correlation values in the range [0.0, 0.7] in steps of 0.1. In the interval between 0.0 and 0.6, the fraction values are varied by a maximum of 1.3%, with F0going from 0.693 to 0.687, and FLfrom 0.314 to 0.319. At 0.7, the combination yields F0= 0.684 ±0.014 and FL= 0.321 ±0.010, which is the maximum variation observed in all tests performed in this study. However, in this case the fit probability decreases to 28%, suggesting that the correlation assumption of 0.7 is less favoured. The fit combination does not converge for unreasonable values, i.e. correlation values above 0.7. In conclusion, the tests reported in this section indicate that the combined results are robust against variations of some poorly known or unknown input correlations. The correlations are varied over a large range, and in all cases the observed deviation from the nominal results are well covered by the uncertainties in the combined result. 5.2 Limits on anomalous couplings The result of the combination of the polarization fractions measurements can be used to set limits on beyond-the-SM physics contributing to the tWb vertex. In the two approaches presented in this section, only new physics contributions to the top quark decay vertex are considered — effects at the production vertex in single top quark processes are disregarded. In a first approach, the structure of the tWb vertex is parameterized in a general form in effective field theory, expanding the SM Lagrangian to include dimension-six terms LtWb =−g √2bγµ(VLPL+VRPR) t W− µ−g √2biσµνqν mW (gLPL+gRPR) t W− µ+ h.c., (5.1) where VL,R and gL,R are leftand right-handed vector and tensor couplings, respectively. Here, PL,R refers to the leftand right-handed chirality projection operators, mWto the W boson mass, and gto the weak coupling constant, as detailed in refs. [47,48]. In the SM, VLis given by the Cabibbo-Kobayashi-Maskawa (CKM) matrix element Vtb, with a measured value of ≈1, while VR=gL=gR= 0 at the tree level. Using this formalism, the polarization fractions can be translated into the couplings VL, VR, gL, and gR(as discussed e.g. in ref. [49]). The two independent W boson polarization measurements, F0 and FL, cannot fully constrain the four tWb couplings. Therefore additional assumptions have to be made. Figure 3shows the limits on the leftand right-handed tensor couplings, – 21 – JHEP08(2020)051 0.15−0.1−0.05−0 0.05 0.1 0.15 0.2 ) L gRe( 0.1− 0.08− 0.06− 0.04− 0.02− 0 0.02 0.04 0.06 0.08 0.1 ) R gRe( WGtopLHC ATLAS+CMS = 8 TeVs SM = 0 R V =1, L VAssumptions: -1 = 20.2 fb int ATLAS, L Best Fit 68% CL 95% CL -1 = 19.7 fb int CMS, L Best Fit 68% CL 95% CL ATLAS+CMS Best Fit 68% CL 95% CL 0.3−0.2−0.1−0 0.1 0.2 0.3 0.4 0.5 0.6 ) R VRe( 0.1− 0.05− 0 0.05 0.1 ) R gRe( WGtopLHC ATLAS+CMS = 8 TeVs SM = 0 L g =1, L VAssumptions: -1 = 20.2 fb int ATLAS, L Best Fit 68% CL 95% CL -1 = 19.7 fb int CMS, L Best Fit 68% CL 95% CL ATLAS+CMS Best Fit 68% CL 95% CL Figure 3. Allowed regions for the tWb anomalous (left) leftand right-handed tensor couplings, and (right) right-handed vector and tensor coupling. The limits are obtained from the ATLAS, CMS, and the combined measurements of the W boson polarization fractions at 68 and 95% CL. The limits from CMS are obtained using the pre-combined result of all CMS input measurements. The anomalous couplings are assumed to be real. 95% CL interval Coupling ATLAS CMS ATLAS+CMS combination Re(VR) [−0.17,0.25] [−0.12,0.16] [−0.11,0.16] Re(gL) [−0.11,0.08] [−0.09,0.06] [−0.08,0.05] Re(gR) [−0.03,0.06] [−0.06,0.01] [−0.04,0.02] Table 8. Allowed ranges for the anomalous couplings VR,gL, and gRat 95% CL. The limit on each coupling is obtained while fixing all other couplings to their SM value. The limits from CMS are obtained using the pre-combined result of all CMS input measurements. The anomalous couplings are assumed to be real. while the other couplings are fixed to their SM values, as well as limits on the right-handed vector and tensor couplings, with the other couplings fixed to their SM values. Limits on these anomalous couplings are set using the EFTfitter tool [50]. The anomalous couplings are assumed to introduce no additional CP violation, and are taken to be real. The allowed regions at 68 and 95% CL and the most probable couplings values are shown, as derived from the measured polarization fractions reported in refs. [5,6], and from the combined results presented in this paper. A second region allowed by the W boson polarization measurements around Re(gR) = 0.8 is excluded by the single top quark cross section measurements [51,52], and therefore is not shown in this figure. Table 8shows the 95% CL intervals for each anomalous coupling, while fixing all others to their SM values. These limits correspond to the set of smallest intervals containing 95% of the marginalized posterior distribution for the corresponding parameter. In a similar way, limits are set in terms of Wilson coefficients. In this second approach, effects of beyond-the-SM physics at a high scale Λ are described by an effective Lagrangian [47,53–56] as −Leff =LSM + Σx Cx Λ2Ox+O1 Λ3+··· (5.2) – 22 – JHEP08(2020)051 95% CL interval Coefficient ATLAS CMS ATLAS+CMS combination C∗ φφ [−5.64,7.68] [−3.84,4.92] [−3.48,5.16] C∗ bW [−1.30,0.96] [−1.06,0.72] [−0.96,0.67] CtW [−0.34,0.67] [−0.62,0.19] [−0.48,0.29] Table 9. Allowed ranges for the Wilson coefficients C∗ φφ,C∗ bW , and CtW at 95% CL. The limit on each coefficient is obtained while fixing all other coefficients to their SM values. The limits from CMS are obtained using the pre-combined result of all CMS input measurements. The numerical values are obtained by setting the Λ scale to 1 TeV, and the coefficients are assumed to be real. where Oxare dimension-six gauge-invariant operators and Cxare the complex constants known as Wilson coefficients that give the strength of the corresponding operator. Only dimension-six operators are considered in this analysis. The relevant operators affecting the general effective tWb vertex can be found, e.g. in ref. [56]. Three of these operators are of particular interest, since the measurement of the W boson polarization is able to constrain their corresponding Wilson coefficients. These operators are: Oφφ = i(˜ φ†Dµφ)(tRγµbR), OtW = (qLσµντItR)˜ φWI µν,and ObW = (qLσµντIbR)φWI µν, (5.3) where φrepresents a weak doublet of the Higgs field, tRand bRare the weak singlets of the right-handed top and bottom quark fields, qT L= (t,b)Ldenotes the SU(2)Lweak doublet of the third generation left-handed quark fields, and τIis the usual Pauli matrix. Assuming the Wilson coefficients to be real, they can be trivially parameterized as functions of the anomalous couplings of eq. (5.1) (as shown e.g. in refs. [48,56]), thus, as functions of the W polarization fractions. The limits on each Wilson coefficient are derived from the measured fractions, as done for the anomalous couplings, fixing all others to their SM value, i.e. to zero. They are shown at 95% CL in table 9. 6 Summary The combination of measurements of the W boson polarization in top quark decays performed by the ATLAS and CMS collaborations is presented. The measurements are based on proton-proton collision data produced at the LHC at a centre-of-mass energy of 8 TeV, and corresponding to an integrated luminosity of about 20 fb−1for each experiment. The fractions of W bosons with longitudinal (F0) and left-handed (FL) polarizations were measured in events containing a single lepton and multiple jets, enhanced in tt or single top quark production processes. The results of the combination are F0= 0.693 ±0.009 (stat+bkg) ±0.011 (syst), FL= 0.315 ±0.006 (stat+bkg) ±0.009 (syst), where “stat+bkg” stands for the sum of the statistical and background determination uncertainties, and “syst” for the remaining systematic uncertainties. The fraction of W – 23 – JHEP08(2020)051 bosons with right-handed polarization, FR, is estimated assuming that the sum of all polarization fractions equals unity, and by taking into account the correlation coefficient of the combination, −0.85. This leads to FR=−0.008 ±0.005 (stat+bkg) ±0.006 (syst), which corresponds to FR<0.007 at 95% confidence level. The results are consistent with the standard model predictions at next-to-next-toleading-order precision in perturbative quantum chromodynamics. A limit on each anomalous tWb coupling is set while fixing all others to their standard model values, with the allowed regions being [−0.11,0.16] for VR, [−0.08,0.05] for gL, and [−0.04,0.02] for gR, at 95% confidence level. All couplings are assumed to be real. Limits on Wilson coefficients are also derived in a similar manner. Acknowledgments We congratulate our colleagues in the CERN accelerator departments for the excellent performance of the LHC and thank the technical and administrative staffs at CERN and at other institutes for their contributions to the success of the ATLAS and CMS efforts. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZˇ S, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; ERC, ERDF, Horizon 2020, Marie Sk lodowska-Curie Actions and COST, European Union; Investissements d’Avenir Labex and Idex, ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and GIF, Israel; CERCA Programme Generalitat de Catalunya and PROMETEO Programme Generalitat Valenciana, Spain; G¨oran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. We acknowledge the enduring support for the construction and operation of the LHC and the CMS detector provided by the following funding agencies: BMBWF and FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, FAPERGS, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador); – 24 – JHEP08(2020)051 S. Bethke115, A. Betti42, A.J. Bevan93, J. Beyer115, D.S. Bhattacharya176, P. Bhattarai26, R. Bi138, R.M. Bianchi138, O. Biebel114, D. Biedermann19, R. Bielski36, K. Bierwagen100, N.V. Biesuz72a,72b, M. Biglietti75a, T.R.V. Billoud110, M. Bindi53, A. Bingul12d, C. Bini73a,73b, S. Biondi23b,23a, M. Birman179, T. Bisanz53, J.P. Biswal3, D. Biswas180,i, A. Bitadze101, C. Bittrich48, K. Bjørke133, T. Blazek28a, I. Bloch46, C. Blocker26, A. Blue57, U. Blumenschein93, G.J. Bobbink120, V.S. Bobrovnikov122b,122a, S.S. Bocchetta97, A. Bocci49, D. Boerner46, D. Bogavac14, A.G. 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Corradi73a,73b, E.E. Corrigan97, F. Corriveau104,ac, A. Cortes-Gonzalez36, M.J. Costa173, F. Costanza5, D. Costanzo148, G. Cowan94, J.W. Cowley32, J. Crane101, K. Cranmer125, S.J. Crawley57, R.A. Creager136, S. Cr´ep´e-Renaudin58, F. Crescioli135, M. Cristinziani24, V. Croft169, G. Crosetti41b,41a, A. Cueto5, T. Cuhadar Donszelmann170, A.R. Cukierman152, W.R. Cunningham57, S. Czekierda85, P. Czodrowski36, M.M. Czurylo61b, M.J. Da Cunha Sargedas De Sousa60b, J.V. Da Fonseca Pinto81b, C. Da Via101, W. Dabrowski84a, F. Dachs36, T. Dado28a, S. Dahbi33e, T. Dai106, C. Dallapiccola103, M. Dam40, G. D’amen29, V. D’Amico75a,75b, J. Damp100, J.R. Dandoy136, M.F. Daneri30, N.S. Dann101, M. Danninger151, V. Dao36, G. Darbo55b, O. Dartsi5, A. Dattagupta131, T. Daubney46, S. D’Auria69a,69b, C. David167b, T. Davidek142, D.R. Davis49, I. Dawson148, K. De8, R. De Asmundis70a, M. De Beurs120, S. De Castro23b,23a, S. De Cecco73a,73b, N. De Groot119, P. de Jong120, H. De la Torre107, A. De Maria15c, D. 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Dimitrievska18, W. Ding15b, J. Dingfelder24, F. Dittus36, F. Djama102, T. Djobava158b, J.I. Djuvsland17, M.A.B. Do Vale81c, M. Dobre27b, D. Dodsworth26, C. Doglioni97, J. Dolejsi142, Z. Dolezal142, M. Donadelli81d, B. Dong60c, J. Donini38, A. D’onofrio15c, M. D’Onofrio91, J. Dopke143, A. Doria70a, M.T. Dova89, A.T. Doyle57, E. Drechsler151, E. Dreyer151, T. Dreyer53, A.S. Drobac169, D. Du60b, Y. Duan60b, F. Dubinin111, M. Dubovsky28a, A. Dubreuil54, E. Duchovni179, G. Duckeck114, O.A. Ducu110, D. Duda115, A. Dudarev36, A.C. Dudder100, E.M. Duffield18, L. Duflot65, M. D¨uhrssen36, C. D¨ulsen181, M. Dumancic179, A.E. Dumitriu27b, A.K. Duncan57, M. Dunford61a, A. Duperrin102, H. Duran Yildiz4a, M. D¨uren56, A. Durglishvili158b, D. Duschinger48, B. Dutta46, D. Duvnjak1, G.I. Dyckes136, M. Dyndal36, S. Dysch101, B.S. Dziedzic85, K.M. Ecker115, M.G. Eggleston49, T. Eifert8, G. Eigen17, K. Einsweiler18, T. Ekelof171, H. El Jarrari35e, R. El Kosseifi102, V. Ellajosyula171, M. Ellert171, F. Ellinghaus181, A.A. Elliot93, N. Ellis36, J. Elmsheuser29, M. Elsing36, D. Emeliyanov143, A. Emerman39, Y. Enari162, M.B. Epland49, J. Erdmann47, A. Ereditato20, P.A. Erland85, M. Errenst36, M. Escalier65, C. Escobar173, O. Estrada Pastor173, E. Etzion160, H. Evans66, M.O. Evans155, A. Ezhilov137, F. Fabbri57, L. Fabbri23b,23a, V. Fabiani119, G. Facini177, R.M. Faisca Rodrigues Pereira139a, R.M. Fakhrutdinov123, S. Falciano73a, P.J. Falke24, S. Falke36, J. Faltova142, Y. Fang15a, Y. Fang15a, G. Fanourakis44, M. Fanti69a,69b, M. Faraj67a,67c,r, A. Farbin8, A. Farilla75a, E.M. Farina71a,71b, T. Farooque107, S.M. Farrington50, P. Farthouat36, F. Fassi35e, P. Fassnacht36, D. Fassouliotis9, M. Faucci Giannelli50, W.J. Fawcett32, L. Fayard65, O.L. Fedin137,o, W. Fedorko174, A. Fehr20, M. Feickert172, L. Feligioni102, A. Fell148, C. Feng60b, M. Feng49, M.J. Fenton170, A.B. Fenyuk123, S.W. Ferguson43, J. Ferrando46, A. Ferrante172, A. Ferrari171, P. Ferrari120, R. Ferrari71a, D.E. Ferreira de Lima61b, A. Ferrer173, D. Ferrere54, C. Ferretti106, F. Fiedler100, A. Filipˇciˇc92, F. Filthaut119, K.D. Finelli25, M.C.N. Fiolhais139a,139c,a, L. Fiorini173, F. Fischer114, W.C. Fisher107, I. Fleck150, – 32 – JHEP08(2020)051 P. Fleischmann106, T. Flick181, B.M. Flierl114, L. Flores136, L.R. Flores Castillo63a, F.M. Follega76a,76b, N. Fomin17, J.H. Foo166, G.T. Forcolin76a,76b, A. Formica144, F.A. F¨orster14, A.C. Forti101, E. Fortin102, M.G. Foti134, D. Fournier65, H. Fox90, P. Francavilla72a,72b, S. Francescato73a,73b, M. Franchini23b,23a, S. Franchino61a, D. Francis36, L. Franco5, L. Franconi20, M. Franklin59, A.N. Fray93, P.M. Freeman21, B. Freund110, W.S. Freund81b, E.M. Freundlich47, D.C. Frizzell128, D. Froidevaux36, J.A. Frost134, M. Fujimoto126, C. Fukunaga163, E. Fullana Torregrosa173, T. Fusayasu116, J. Fuster173, A. Gabrielli23b,23a, A. Gabrielli18, S. Gadatsch54, P. Gadow115, G. Gagliardi55b,55a, L.G. Gagnon110, B. Galhardo139a, G.E. Gallardo134, E.J. Gallas134, B.J. Gallop143, G. Galster40, R. Gamboa Goni93, K.K. Gan127, S. Ganguly179, J. Gao60a, Y. Gao50, Y.S. Gao31,l, C. Garc´ıa173, J.E. Garc´ıa Navarro173, J.A. Garc´ıa Pascual15a, C. Garcia-Argos52, M. Garcia-Sciveres18, R.W. Gardner37, N. Garelli152, S. Gargiulo52, C.A. Garner166, V. Garonne133, S.J. Gasiorowski147, P. Gaspar81b, A. Gaudiello55b,55a, G. Gaudio71a, I.L. Gavrilenko111, A. Gavrilyuk124, C. Gay174, G. Gaycken46, E.N. Gazis10, A.A. Geanta27b, C.M. Gee145, C.N.P. Gee143, J. Geisen97, M. Geisen100, C. Gemme55b, M.H. Genest58, C. Geng106, S. Gentile73a,73b, S. George94, T. Geralis44, L.O. Gerlach53, P. Gessinger-Befurt100, G. Gessner47, S. Ghasemi150, M. Ghasemi Bostanabad175, M. Ghneimat150, A. Ghosh65, A. Ghosh78, B. Giacobbe23b, S. Giagu73a,73b, N. Giangiacomi23b,23a, P. Giannetti72a, A. Giannini70a,70b, G. Giannini14, S.M. Gibson94, M. Gignac145, D. Gillberg34, G. Gilles181, D.M. Gingrich3,am, M.P. Giordani67a,67c, P.F. Giraud144, G. Giugliarelli67a,67c, D. Giugni69a, F. Giuli74a,74b, S. Gkaitatzis161, I. Gkialas9,g, E.L. Gkougkousis14, P. Gkountoumis10, L.K. Gladilin113, C. Glasman99, J. Glatzer14, P.C.F. Glaysher46, A. Glazov46, G.R. Gledhill131, I. Gnesi41b, M. Goblirsch-Kolb26, D. Godin110, S. Goldfarb105, T. Golling54, D. Golubkov123, A. Gomes139a,139b, R. Goncalves Gama53, R. Gon¸calo139a, G. Gonella131, L. Gonella21, A. Gongadze80, F. Gonnella21, J.L. Gonski39, S. Gonz´alez de la Hoz173, S. Gonzalez Fernandez14, C. Gonzalez Renteria18, R. Gonzalez Suarez171, S. Gonzalez-Sevilla54, G.R. Gonzalvo Rodriguez173, L. Goossens36, N.A. Gorasia21, P.A. Gorbounov124, H.A. Gordon29, B. Gorini36, E. Gorini68a,68b, A. Goriˇsek92, A.T. Goshaw49, M.I. Gostkin80, C.A. Gottardo119, M. Gouighri35b, A.G. Goussiou147, N. Govender33c, C. Goy5, E. Gozani159, I. Grabowska-Bold84a, E.C. Graham91, J. Gramling170, E. Gramstad133, S. Grancagnolo19, M. Grandi155, V. Gratchev137, P.M. Gravila27f , F.G. Gravili68a,68b, C. Gray57, H.M. Gray18, C. Grefe24, K. Gregersen97, I.M. Gregor46, P. Grenier152, K. Grevtsov46, C. Grieco14, N.A. Grieser128, A.A. Grillo145, K. Grimm31,k, S. Grinstein14,x, J.-F. Grivaz65, S. Groh100, E. Gross179, J. Grosse-Knetter53, Z.J. Grout95, C. Grud106, A. Grummer118, J.C. Grundy134, L. Guan106, W. Guan180, C. Gubbels174, J. Guenther36, A. Guerguichon65, J.G.R. Guerrero Rojas173, F. Guescini115, D. Guest170, R. Gugel52, T. Guillemin5, S. Guindon36, U. Gul57, J. Guo60c, W. Guo106, Y. Guo60a, Z. Guo102, R. Gupta46, S. Gurbuz12c, G. Gustavino128, M. Guth52, P. Gutierrez128, C. Gutschow95, C. Guyot144, C. Gwenlan134, C.B. Gwilliam91, A. Haas125, C. Haber18, H.K. Hadavand8, A. Hadef60a, M. Haleem176, J. Haley129, J.J. Hall148, G. Halladjian107, G.D. Hallewell102, K. Hamacher181, P. Hamal130, K. Hamano175, H. Hamdaoui35e, M. Hamer24, G.N. Hamity50, K. Han60a,w, L. Han60a, S. Han15a, Y.F. Han166, K. Hanagaki82,u, M. Hance145, D.M. Handl114, B. Haney136, M.D. Hank37, R. Hankache135, E. Hansen97, J.B. Hansen40, J.D. Hansen40, M.C. Hansen24, P.H. Hansen40, E.C. Hanson101, K. Hara168, T. Harenberg181, S. Harkusha108, P.F. Harrison177, N.M. Hartman152, N.M. Hartmann114, Y. Hasegawa149, A. Hasib50, S. Hassani144, S. Haug20, R. Hauser107, L.B. Havener39, M. Havranek141, C.M. Hawkes21, R.J. Hawkings36, S. Hayashida117, D. Hayden107, C. Hayes106, R.L. Hayes174, C.P. Hays134, J.M. Hays93, H.S. Hayward91, S.J. Haywood143, F. He60a, M.P. Heath50, V. Hedberg97, S. Heer24, A.L. Heggelund133, K.K. Heidegger52, W.D. Heidorn79, J. Heilman34, S. Heim46, T. Heim18, B. Heinemann46,ak, – 33 – JHEP08(2020)051 J.J. Heinrich131, L. Heinrich36, J. Hejbal140, L. Helary61b, A. Held125, S. Hellesund133, C.M. Helling145, S. Hellman45a,45b, C. Helsens36, R.C.W. Henderson90, Y. Heng180, L. Henkelmann32, A.M. Henriques Correia36, H. Herde26, Y. Hern´andez Jim´enez33e, H. Herr100, M.G. Herrmann114, T. Herrmann48, G. Herten52, R. Hertenberger114, L. Hervas36, T.C. Herwig136, G.G. Hesketh95, N.P. Hessey167a, H. Hibi83, A. Higashida162, S. Higashino82, E. Hig´on-Rodriguez173, K. Hildebrand37, J.C. Hill32, K.K. Hill29, K.H. Hiller46, S.J. Hillier21, M. Hils48, I. Hinchliffe18, F. Hinterkeuser24, M. Hirose132, S. Hirose52, D. Hirschbuehl181, B. Hiti92, O. Hladik140, D.R. Hlaluku33e, J. Hobbs154, N. Hod179, M.C. Hodgkinson148, A. Hoecker36, D. Hohn52, D. Hohov65, T. Holm24, T.R. Holmes37, M. Holzbock114, L.B.A.H. Hommels32, T.M. Hong138, J.C. Honig52, A. H¨onle115, B.H. Hooberman172, W.H. Hopkins6, Y. Horii117, P. Horn48, L.A. Horyn37, S. Hou157, A. Hoummada35a, J. Howarth57, J. Hoya89, M. Hrabovsky130, J. Hrdinka77, I. Hristova19, J. Hrivnac65, A. Hrynevich109, T. Hryn’ova5, P.J. Hsu64, S.-C. Hsu147, Q. Hu29, S. Hu60c, Y.F. Hu15a,15d, D.P. Huang95, Y. Huang60a, Y. Huang15a, Z. Hubacek141, F. Hubaut102, M. Huebner24, F. Huegging24, T.B. Huffman134, M. Huhtinen36, R.F.H. Hunter34, P. Huo154, N. Huseynov80,ad, J. Huston107, J. Huth59, R. Hyneman106, S. Hyrych28a, G. Iacobucci54, G. Iakovidis29, I. Ibragimov150, L. Iconomidou-Fayard65, P. Iengo36, R. Ignazzi40, O. Igonkina120,z,∗, R. Iguchi162, T. Iizawa54, Y. Ikegami82, M. Ikeno82, D. Iliadis161, N. Ilic119,166,ac, F. Iltzsche48, G. Introzzi71a,71b, M. Iodice75a, K. Iordanidou167a, V. Ippolito73a,73b, M.F. Isacson171, M. Ishino162, W. Islam129, C. Issever19,46, S. Istin159, F. Ito168, J.M. Iturbe Ponce63a, R. Iuppa76a,76b, A. Ivina179, H. Iwasaki82, J.M. Izen43, V. Izzo70a, P. Jacka140, P. Jackson1, R.M. Jacobs46, B.P. Jaeger151, V. Jain2, G. J¨akel181, K.B. Jakobi100, K. Jakobs52, T. Jakoubek140, J. Jamieson57, K.W. Janas84a, R. Jansky54, M. Janus53, P.A. Janus84a, G. Jarlskog97, A.E. Jaspan91, N. Javadov80,ad, T. Jav˚urek36, M. Javurkova103, F. Jeanneau144, L. Jeanty131, J. Jejelava158a, A. Jelinskas177, P. Jenni52,b, N. Jeong46, S. J´ez´equel5, H. Ji180, J. Jia154, H. Jiang79, Y. Jiang60a, Z. Jiang152, S. Jiggins52, F.A. Jimenez Morales38, J. Jimenez Pena115, S. Jin15c, A. Jinaru27b, O. Jinnouchi164, H. Jivan33e, P. Johansson148, K.A. Johns7, C.A. Johnson66, R.W.L. Jones90, S.D. Jones155, S. Jones7, T.J. Jones91, J. Jongmanns61a, P.M. Jorge139a, J. Jovicevic36, X. Ju18, J.J. Junggeburth115, A. Juste Rozas14,x, A. Kaczmarska85, M. Kado73a,73b, H. Kagan127, M. Kagan152, A. Kahn39, C. Kahra100, T. Kaji178, E. Kajomovitz159, C.W. Kalderon29, A. Kaluza100, A. Kamenshchikov123, M. Kaneda162, N.J. Kang145, S. Kang79, Y. Kano117, J. Kanzaki82, L.S. Kaplan180, D. Kar33e, K. Karava134, M.J. Kareem167b, I. Karkanias161, S.N. Karpov80, Z.M. Karpova80, V. Kartvelishvili90, A.N. Karyukhin123, A. Kastanas45a,45b, C. Kato60d,60c, J. Katzy46, K. Kawade149, K. Kawagoe88, T. Kawaguchi117, T. Kawamoto144, G. Kawamura53, E.F. Kay175, S. Kazakos14, V.F. Kazanin122b,122a, R. Keeler175, R. Kehoe42, J.S. Keller34, E. Kellermann97, D. Kelsey155, J.J. Kempster21, J. Kendrick21, K.E. Kennedy39, O. Kepka140, S. Kersten181, B.P. Kerˇsevan92, S. Ketabchi Haghighat166, M. Khader172, F. Khalil-Zada13, M. Khandoga144, A. Khanov129, A.G. Kharlamov122b,122a, T. Kharlamova122b,122a, E.E. Khoda174, A. Khodinov165, T.J. Khoo54, E. Khramov80, J. Khubua158b, S. Kido83, M. Kiehn54, C.R. Kilby94, E. Kim164, Y.K. Kim37, N. Kimura95, O.M. Kind19, B.T. King91,∗, D. Kirchmeier48, J. Kirk143, A.E. Kiryunin115, T. Kishimoto162, D.P. Kisliuk166, V. Kitali46, C. Kitsaki10, O. Kivernyk24, T. Klapdor-Kleingrothaus52, M. Klassen61a, C. Klein34, M.H. Klein106, M. Klein91, U. Klein91, K. Kleinknecht100, P. Klimek121, A. Klimentov29, T. Klingl24, T. Klioutchnikova36, F.F. Klitzner114, P. Kluit120, S. Kluth115, E. Kneringer77, E.B.F.G. Knoops102, A. Knue52, D. Kobayashi88, T. Kobayashi162, M. Kobel48, M. Kocian152, T. Kodama162, P. Kodys142, D.M. Koeck155, P.T. Koenig24, T. Koffas34, N.M. K¨ohler36, M. Kolb144, I. Koletsou5, T. Komarek130, T. Kondo82, K. K¨oneke52, A.X.Y. Kong1, A.C. K¨onig119, T. Kono126, V. Konstantinides95, N. Konstantinidis95, B. Konya97, – 34 – JHEP08(2020)051 R. Kopeliansky66, S. Koperny84a, K. Korcyl85, K. Kordas161, G. Koren160, A. Korn95, I. Korolkov14, E.V. Korolkova148, N. Korotkova113, O. Kortner115, S. Kortner115, V.V. Kostyukhin148,165, A. Kotsokechagia65, A. Kotwal49, A. Koulouris10, A. Kourkoumeli-Charalampidi71a,71b, C. Kourkoumelis9, E. Kourlitis148, V. Kouskoura29, A.B. Kowalewska85, R. Kowalewski175, W. Kozanecki101, A.S. Kozhin123, V.A. Kramarenko113, G. Kramberger92, D. Krasnopevtsev60a, M.W. Krasny135, A. Krasznahorkay36, D. Krauss115, J.A. Kremer100, J. Kretzschmar91, P. Krieger166, F. Krieter114, A. Krishnan61b, K. Krizka18, K. Kroeninger47, H. Kroha115, J. Kroll140, J. Kroll136, K.S. Krowpman107, U. Kruchonak80, H. Kr¨uger24, N. Krumnack79, M.C. Kruse49, J.A. Krzysiak85, T. Kubota105, O. Kuchinskaia165, S. Kuday4b, J.T. Kuechler46, S. Kuehn36, A. Kugel61a, T. Kuhl46, V. Kukhtin80, Y. Kulchitsky108,af , S. Kuleshov146b, Y.P. Kulinich172, M. Kuna58, T. Kunigo86, A. Kupco140, T. Kupfer47, O. Kuprash52, H. Kurashige83, L.L. Kurchaninov167a, Y.A. Kurochkin108, A. Kurova112, M.G. Kurth15a,15d, E.S. Kuwertz36, M. Kuze164, A.K. Kvam147, J. Kvita130, T. Kwan104, L. La Rotonda41b,41a, F. La Ruffa41b,41a, C. Lacasta173, F. Lacava73a,73b, D.P.J. Lack101, H. Lacker19, D. Lacour135, E. Ladygin80, R. Lafaye5, B. Laforge135, T. Lagouri146b, S. Lai53, I.K. Lakomiec84a, S. Lammers66, W. Lampl7, C. Lampoudis161, E. Lan¸con29, U. Landgraf52, M.P.J. Landon93, M.C. Lanfermann54, V.S. Lang52, J.C. Lange53, R.J. Langenberg103, A.J. Lankford170, F. Lanni29, K. Lantzsch24, A. Lanza71a, A. Lapertosa55b,55a, S. Laplace135, J.F. Laporte144, T. Lari69a, F. Lasagni Manghi23b,23a, M. Lassnig36, T.S. Lau63a, A. Laudrain65, A. Laurier34, M. Lavorgna70a,70b, S.D. Lawlor94, M. Lazzaroni69a,69b, B. Le101, E. Le Guirriec102, A. Lebedev79, M. LeBlanc7, T. LeCompte6, F. Ledroit-Guillon58, A.C.A. Lee95, C.A. Lee29, G.R. Lee17, L. Lee59, S.C. Lee157, S. Lee79, B. Lefebvre167a, H.P. Lefebvre94, M. Lefebvre175, C. Leggett18, K. Lehmann151, N. Lehmann20, G. Lehmann Miotto36, W.A. Leight46, A. Leisos161,v, M.A.L. Leite81d, C.E. Leitgeb114, R. Leitner142, D. Lellouch179,∗, K.J.C. Leney42, T. Lenz24, R. Leone7, S. Leone72a, C. Leonidopoulos50, A. Leopold135, C. Leroy110, R. Les166, C.G. Lester32, M. Levchenko137, J. Levˆeque5, D. Levin106, L.J. Levinson179, D.J. Lewis21, B. Li15b, B. Li106, C-Q. Li60a, F. Li60c, H. Li60a, H. Li60b, J. Li60c, K. Li147, L. Li60c, M. Li15a,15d, Q. Li15a,15d, Q.Y. Li60a, S. Li60d,60c, X. Li46, Y. Li46, Z. Li60b, Z. Li104, Z. Liang15a, M. Liberatore46, B. Liberti74a, A. Liblong166, K. Lie63c, S. Lim29, C.Y. Lin32, K. Lin107, T.H. Lin100, R.A. Linck66, R.E. Lindley7, J.H. Lindon21, A.L. Lionti54, E. Lipeles136, A. Lipniacka17, T.M. Liss172,al, A. Lister174, J.D. Little8, B. Liu79, B.L. Liu6, H.B. Liu29, H. Liu106, J.B. Liu60a, J.K.K. Liu37, K. Liu60d, M. Liu60a, P. Liu15a, Y. Liu46, Y. Liu15a,15d, Y.L. Liu106, Y.W. Liu60a, M. Livan71a,71b, A. Lleres58, J. Llorente Merino151, S.L. Lloyd93, C.Y. Lo63b, E.M. Lobodzinska46, P. Loch7, S. Loffredo74a,74b, T. Lohse19, K. Lohwasser148, M. Lokajicek140, J.D. Long172, R.E. Long90, L. Longo36, K.A. Looper127, I. Lopez Paz101, A. Lopez Solis148, J. Lorenz114, N. Lorenzo Martinez5, A.M. Lory114, P.J. L¨osel114, A. L¨osle52, X. Lou46, X. Lou15a, A. Lounis65, J. Love6, P.A. Love90, J.J. Lozano Bahilo173, M. Lu60a, Y.J. Lu64, H.J. Lubatti147, C. Luci73a,73b, A. Lucotte58, C. Luedtke52, F. Luehring66, I. Luise135, L. Luminari73a, B. Lund-Jensen153, M.S. Lutz160, D. Lynn29, H. Lyons91, R. Lysak140, E. Lytken97, F. Lyu15a, V. Lyubushkin80, T. Lyubushkina80, H. Ma29, L.L. Ma60b, Y. Ma95, G. Maccarrone51, A. Macchiolo115, C.M. Macdonald148, J. Machado Miguens136, D. Madaffari173, R. Madar38, W.F. Mader48, M. Madugoda Ralalage Don129, N. Madysa48, J. Maeda83, T. Maeno29, M. Maerker48, V. Magerl52, N. Magini79, J. Magro67a,67c,r, D.J. Mahon39, C. Maidantchik81b, T. Maier114, A. Maio139a,139b,139d, K. Maj84a, O. Majersky28a, S. Majewski131, Y. Makida82, N. Makovec65, B. Malaescu135, Pa. Malecki85, V.P. Maleev137, F. Malek58, U. Mallik78, D. Malon6, C. Malone32, S. Maltezos10, S. Malyukov80, J. Mamuzic173, G. Mancini51, I. Mandi´c92, L. Manhaes de Andrade Filho81a, I.M. Maniatis161, J. Manjarres Ramos48, K.H. Mankinen97, – 35 – JHEP08(2020)051 A. Mann114, A. Manousos77, B. Mansoulie144, I. Manthos161, S. Manzoni120, A. Marantis161, G. Marceca30, L. Marchese134, G. Marchiori135, M. Marcisovsky140, L. Marcoccia74a,74b, C. Marcon97, C.A. Marin Tobon36, M. Marjanovic128, Z. Marshall18, M.U.F. Martensson171, S. Marti-Garcia173, C.B. Martin127, T.A. Martin177, V.J. Martin50, B. Martin dit Latour17, L. Martinelli75a,75b, M. Martinez14,x, P. Martinez Agullo173, V.I. Martinez Outschoorn103, S. Martin-Haugh143, V.S. Martoiu27b, A.C. Martyniuk95, A. Marzin36, S.R. Maschek115, L. Masetti100, T. Mashimo162, R. Mashinistov111, J. Masik101, A.L. Maslennikov122b,122a, L. Massa23b,23a, P. Massarotti70a,70b, P. Mastrandrea72a,72b, A. Mastroberardino41b,41a, T. Masubuchi162, D. Matakias29, A. Matic114, N. Matsuzawa162, P. M¨attig24, J. Maurer27b, B. Maˇcek92, D.A. Maximov122b,122a, R. Mazini157, I. Maznas161, S.M. Mazza145, J.P. Mc Gowan104, S.P. Mc Kee106, T.G. McCarthy115, W.P. McCormack18, E.F. McDonald105, J.A. Mcfayden36, G. Mchedlidze158b, M.A. McKay42, K.D. McLean175, S.J. McMahon143, P.C. McNamara105, C.J. McNicol177, R.A. McPherson175,ac, J.E. Mdhluli33e, Z.A. Meadows103, S. Meehan36, T. Megy38, S. Mehlhase114, A. Mehta91, B. Meirose43, D. Melini159, B.R. Mellado Garcia33e, J.D. Mellenthin53, M. Melo28a, F. Meloni46, A. Melzer24, S.B. Menary101, E.D. Mendes Gouveia139a,139e, L. Meng36, X.T. Meng106, S. Menke115, E. Meoni41b,41a, S. Mergelmeyer19, S.A.M. Merkt138, C. Merlassino134, P. Mermod54, L. Merola70a,70b, C. Meroni69a, G. Merz106, O. Meshkov113,111, J.K.R. Meshreki150, A. Messina73a,73b, J. Metcalfe6, A.S. Mete6, C. Meyer66, J-P. Meyer144, H. Meyer Zu Theenhausen61a, F. Miano155, M. Michetti19, R.P. Middleton143, L. Mijovi´c50, G. Mikenberg179, M. Mikestikova140, M. Mikuˇz92, H. Mildner148, M. Milesi105, A. Milic166, C.D. Milke42, D.W. Miller37, A. Milov179, D.A. Milstead45a,45b, R.A. Mina152, A.A. Minaenko123, M. Mi˜nano Moya173, I.A. Minashvili158b, A.I. Mincer125, B. Mindur84a, M. Mineev80, Y. Minegishi162, L.M. Mir14, M. Mironova134, A. Mirto68a,68b, K.P. Mistry136, T. Mitani178, J. Mitrevski114, V.A. Mitsou173, M. Mittal60c, O. Miu166, A. Miucci20, P.S. Miyagawa148, A. Mizukami82, J.U. Mj¨ornmark97, T. Mkrtchyan61a, M. Mlynarikova142, T. Moa45a,45b, S. Mobius53, K. Mochizuki110, P. Mogg114, S. Mohapatra39, R. Moles-Valls24, M.C. Mondragon107, K. M¨onig46, E. Monnier102, A. Montalbano151, J. Montejo Berlingen36, M. Montella95, F. Monticelli89, S. Monzani69a, N. Morange65, D. Moreno22a, M. Moreno Ll´acer173, C. Moreno Martinez14, P. Morettini55b, M. Morgenstern159, S. Morgenstern48, D. Mori151, M. Morii59, M. Morinaga178, V. Morisbak133, A.K. Morley36, G. Mornacchi36, A.P. Morris95, L. Morvaj154, P. Moschovakos36, B. Moser120, M. Mosidze158b, T. Moskalets144, H.J. Moss148, J. Moss31,m, E.J.W. Moyse103, S. Muanza102, J. Mueller138, R.S.P. Mueller114, D. Muenstermann90, G.A. Mullier97, D.P. Mungo69a,69b, J.L. Munoz Martinez14, F.J. Munoz Sanchez101, P. Murin28b, W.J. Murray177,143, A. Murrone69a,69b, M. Muˇskinja18, C. Mwewa33a, A.G. Myagkov123,ah, A.A. Myers138, J. Myers131, M. Myska141, B.P. Nachman18, O. Nackenhorst47, A.Nag Nag48, K. Nagai134, K. Nagano82, Y. Nagasaka62, J.L. Nagle29, E. Nagy102, A.M. Nairz36, Y. Nakahama117, K. Nakamura82, T. Nakamura162, H. Nanjo132, F. Napolitano61a, R.F. Naranjo Garcia46, R. Narayan42, I. Naryshkin137, T. Naumann46, G. Navarro22a, P.Y. Nechaeva111, F. Nechansky46, T.J. Neep21, A. Negri71a,71b, M. Negrini23b, C. Nellist119, M.E. Nelson45a,45b, S. Nemecek140, M. Nessi36,d, M.S. Neubauer172, F. Neuhaus100, M. Neumann181, R. Newhouse174, P.R. Newman21, C.W. Ng138, Y.S. Ng19, Y.W.Y. Ng170, B. Ngair35e, H.D.N. Nguyen102, T. Nguyen Manh110, E. Nibigira38, R.B. Nickerson134, R. Nicolaidou144, D.S. Nielsen40, J. Nielsen145, N. Nikiforou11, V. Nikolaenko123,ah, I. Nikolic-Audit135, K. Nikolopoulos21, P. Nilsson29, H.R. Nindhito54, Y. Ninomiya82, A. Nisati73a, N. Nishu60c, R. Nisius115, I. Nitsche47, T. Nitta178, T. Nobe162, Y. Noguchi86, I. Nomidis135, M.A. Nomura29, M. Nordberg36, T. Novak92, O. Novgorodova48, R. Novotny141, L. Nozka130, K. Ntekas170, E. Nurse95, F.G. Oakham34,am, H. Oberlack115, J. Ocariz135, A. Ochi83, I. Ochoa39, J.P. Ochoa-Ricoux146a, – 36 – JHEP08(2020)051 K. O’Connor26, S. Oda88, S. Odaka82, S. Oerdek53, A. Ogrodnik84a, A. Oh101, S.H. Oh49, C.C. Ohm153, H. Oide164, M.L. Ojeda166, H. Okawa168, Y. Okazaki86, M.W. O’Keefe91, Y. Okumura162, T. Okuyama82, A. Olariu27b, L.F. Oleiro Seabra139a, S.A. Olivares Pino146a, D. Oliveira Damazio29, J.L. Oliver1, M.J.R. Olsson170, A. Olszewski85, J. Olszowska85, D.C. O’Neil151, A.P. O’neill134, A. Onofre139a,139e, P.U.E. Onyisi11, H. Oppen133, R.G. Oreamuno Madriz121, M.J. Oreglia37, G.E. Orellana89, D. Orestano75a,75b, N. Orlando14, R.S. Orr166, V. O’Shea57, R. Ospanov60a, G. Otero y Garzon30, H. Otono88, P.S. Ott61a, G.J. Ottino18, M. Ouchrif35d, J. Ouellette29, F. Ould-Saada133, A. Ouraou144, Q. Ouyang15a, M. Owen57, R.E. Owen21, V.E. Ozcan12c, N. Ozturk8, J. Pacalt130, H.A. Pacey32, K. Pachal49, A. Pacheco Pages14, C. Padilla Aranda14, S. Pagan Griso18, M. Paganini182, G. Palacino66, S. Palazzo50, S. Palestini36, M. Palka84b, D. Pallin38, P. Palni84a, I. Panagoulias10, C.E. Pandini36, J.G. Panduro Vazquez94, P. Pani46, G. Panizzo67a,67c, L. Paolozzi54, C. Papadatos110, K. Papageorgiou9,g, S. Parajuli42, A. Paramonov6, C. Paraskevopoulos10, D. Paredes Hernandez63b, S.R. Paredes Saenz134, B. Parida165, T.H. Park166, A.J. Parker31, M.A. Parker32, F. Parodi55b,55a, E.W. Parrish121, J.A. Parsons39, U. Parzefall52, L. Pascual Dominguez135, V.R. Pascuzzi18, J.M.P. Pasner145, F. Pasquali120, E. Pasqualucci73a, S. Passaggio55b, F. Pastore94, P. Pasuwan45a,45b, S. Pataraia100, J.R. Pater101, A. Pathak180,i, J. Patton91, T. Pauly36, J. Pearkes152, B. Pearson115, M. Pedersen133, L. Pedraza Diaz119, R. Pedro139a, T. Peiffer53, S.V. Peleganchuk122b,122a, O. Penc140, H. Peng60a, B.S. Peralva81a, M.M. Perego65, A.P. Pereira Peixoto139a, L. Pereira Sanchez45a,45b, D.V. Perepelitsa29, F. Peri19, L. Perini69a,69b, H. Pernegger36, S. Perrella139a, A. Perrevoort120, K. Peters46, R.F.Y. Peters101, B.A. Petersen36, T.C. Petersen40, E. Petit102, A. Petridis1, C. Petridou161, P. Petroff65, F. Petrucci75a,75b, M. Pettee182, N.E. Pettersson103, K. Petukhova142, A. Peyaud144, R. Pezoa146d, L. Pezzotti71a,71b, T. Pham105, F.H. Phillips107, P.W. Phillips143, M.W. Phipps172, G. Piacquadio154, E. Pianori18, A. Picazio103, R.H. Pickles101, R. Piegaia30, D. Pietreanu27b, J.E. Pilcher37, A.D. Pilkington101, M. Pinamonti67a,67c, J.L. Pinfold3, C. Pitman Donaldson95, M. Pitt160, L. Pizzimento74a,74b, M.-A. Pleier29, V. Pleskot142, E. Plotnikova80, P. Podberezko122b,122a, R. Poettgen97, R. Poggi54, L. Poggioli135, I. Pogrebnyak107, D. Pohl24, I. Pokharel53, G. Polesello71a, A. Poley18, A. Policicchio73a,73b, R. Polifka142, A. Polini23b, C.S. Pollard46, V. Polychronakos29, D. Ponomarenko112, L. Pontecorvo36, S. Popa27a, G.A. Popeneciu27d, L. Portales5, D.M. Portillo Quintero58, S. Pospisil141, K. Potamianos46, I.N. Potrap80, C.J. Potter32, H. Potti11, T. Poulsen97, J. Poveda173, T.D. Powell148, G. Pownall46, M.E. Pozo Astigarraga36, P. Pralavorio102, S. Prell79, D. Price101, M. Primavera68a, S. Prince104, M.L. Proffitt147, N. Proklova112, K. Prokofiev63c, F. Prokoshin80, S. Protopopescu29, J. Proudfoot6, M. Przybycien84a, D. Pudzha137, A. Puri172, P. Puzo65, J. Qian106, Y. Qin101, A. Quadt53, M. Queitsch-Maitland36, A. Qureshi1, M. Racko28a, F. Ragusa69a,69b, G. Rahal98, J.A. Raine54, S. Rajagopalan29, A. Ramirez Morales93, K. Ran15a,15d, T. Rashid65, D.M. Rauch46, F. Rauscher114, S. Rave100, B. Ravina148, I. Ravinovich179, J.H. Rawling101, M. Raymond36, A.L. Read133, N.P. Readioff58, M. Reale68a,68b, D.M. Rebuzzi71a,71b, G. Redlinger29, K. Reeves43, L. Rehnisch19, J. Reichert136, D. Reikher160, A. Reiss100, A. Rej150, C. Rembser36, A. Renardi46, M. Renda27b, M. Rescigno73a, S. Resconi69a, E.D. Resseguie18, S. Rettie95, B. Reynolds127, E. Reynolds21, O.L. Rezanova122b,122a, P. Reznicek142, E. Ricci76a,76b, R. Richter115, S. Richter46, E. Richter-Was84b, O. Ricken24, M. Ridel135, P. Rieck115, O. Rifki46, M. Rijssenbeek154, A. Rimoldi71a,71b, M. Rimoldi46, L. Rinaldi23b, G. Ripellino153, I. Riu14, J.C. Rivera Vergara175, F. Rizatdinova129, E. Rizvi93, C. Rizzi36, R.T. Roberts101, S.H. Robertson104,ac, M. Robin46, D. Robinson32, C.M. Robles Gajardo146d, M. Robles Manzano100, A. Robson57, A. Rocchi74a,74b, E. Rocco100, C. Roda72a,72b, S. Rodriguez Bosca173, D. Rodriguez Rodriguez173, A.M. Rodr´ıguez Vera167b, S. Roe36, O. Røhne133, R. R¨ohrig115, R.A. Rojas146d, B. Roland52, – 37 – JHEP08(2020)051 C.P.A. Roland66, J. Roloff29, A. Romaniouk112, M. Romano23b,23a, N. Rompotis91, M. Ronzani125, L. Roos135, S. Rosati73a, G. Rosin103, B.J. Rosser136, E. Rossi46, E. Rossi75a,75b, E. Rossi70a,70b, L.P. Rossi55b, L. Rossini69a,69b, R. Rosten14, M. Rotaru27b, B. Rottler52, D. Rousseau65, G. Rovelli71a,71b, A. Roy11, D. Roy33e, A. Rozanov102, Y. Rozen159, X. Ruan33e, F. R¨uhr52, A. Ruiz-Martinez173, A. Rummler36, Z. Rurikova52, N.A. Rusakovich80, H.L. Russell104, L. Rustige38,47, J.P. Rutherfoord7, E.M. R¨uttinger148, M. Rybar39, G. Rybkin65, E.B. Rye133, A. Ryzhov123, J.A. Sabater Iglesias46, P. Sabatini53, S. Sacerdoti65, H.F-W. Sadrozinski145, R. Sadykov80, F. Safai Tehrani73a, B. Safarzadeh Samani155, M. Safdari152, P. Saha121, S. Saha104, M. Sahinsoy61a, A. Sahu181, M. Saimpert36, M. Saito162, T. Saito162, H. Sakamoto162, D. Salamani54, G. Salamanna75a,75b, J.E. Salazar Loyola146d, A. Salnikov152, J. Salt173, A. Salvador Salas14, D. Salvatore41b,41a, F. Salvatore155, A. Salvucci63a,63b,63c, A. Salzburger36, J. Samarati36, D. Sammel52, D. Sampsonidis161, D. Sampsonidou161, J. S´anchez173, A. Sanchez Pineda67a,36,67c, H. Sandaker133, C.O. Sander46, I.G. Sanderswood90, M. Sandhoff181, C. Sandoval22a, D.P.C. Sankey143, M. Sannino55b,55a, Y. Sano117, A. Sansoni51, C. Santoni38, H. Santos139a,139b, S.N. Santpur18, A. Santra173, A. Sapronov80, J.G. Saraiva139a,139d, O. Sasaki82, K. Sato168, F. Sauerburger52, E. Sauvan5, P. Savard166,am, R. Sawada162, C. Sawyer143, L. Sawyer96,ag, C. Sbarra23b, A. Sbrizzi23a, T. Scanlon95, J. Schaarschmidt147, P. Schacht115, B.M. Schachtner114, D. Schaefer37, L. Schaefer136, J. Schaeffer100, S. Schaepe36, U. Sch¨afer100, A.C. Schaffer65, D. Schaile114, R.D. Schamberger154, E. Schanet114, N. Scharmberg101, V.A. Schegelsky137, D. Scheirich142, F. Schenck19, M. Schernau170, C. Schiavi55b,55a, L.K. Schildgen24, Z.M. Schillaci26, E.J. Schioppa68a,68b, M. Schioppa41b,41a, K.E. Schleicher52, S. Schlenker36, K.R. Schmidt-Sommerfeld115, K. Schmieden36, C. Schmitt100, S. Schmitt46, S. Schmitz100, J.C. Schmoeckel46, L. Schoeffel144, A. Schoening61b, P.G. Scholer52, E. Schopf134, M. Schott100, J.F.P. Schouwenberg119, J. Schovancova36, S. Schramm54, F. Schroeder181, A. Schulte100, H-C. Schultz-Coulon61a, M. Schumacher52, B.A. Schumm145, Ph. Schune144, A. Schwartzman152, T.A. Schwarz106, Ph. Schwemling144, R. Schwienhorst107, A. Sciandra145, G. Sciolla26, M. Scodeggio46, M. Scornajenghi41b,41a, F. Scuri72a, F. Scutti105, L.M. Scyboz115, C.D. Sebastiani73a,73b, P. Seema19, S.C. Seidel118, A. Seiden145, B.D. Seidlitz29, T. Seiss37, C. Seitz46, J.M. Seixas81b, G. Sekhniaidze70a, S.J. Sekula42, N. Semprini-Cesari23b,23a, S. Sen49, C. Serfon29, L. Serin65, L. Serkin67a,67b, M. Sessa60a, H. Severini128, S. Sevova152, F. Sforza55b,55a, A. Sfyrla54, E. Shabalina53, J.D. Shahinian145, N.W. Shaikh45a,45b, D. Shaked Renous179, L.Y. Shan15a, M. Shapiro18, A. Sharma134, A.S. Sharma1, P.B. Shatalov124, K. Shaw155, S.M. Shaw101, M. Shehade179, Y. Shen128, A.D. Sherman25, P. Sherwood95, L. Shi157, S. Shimizu82, C.O. Shimmin182, Y. Shimogama178, M. Shimojima116, I.P.J. Shipsey134, S. Shirabe164, M. Shiyakova80,aa, J. Shlomi179, A. Shmeleva111, M.J. Shochet37, J. Shojaii105, D.R. Shope128, S. Shrestha127, E.M. Shrif33e, E. Shulga179, P. Sicho140, A.M. Sickles172, P.E. Sidebo153, E. Sideras Haddad33e, O. Sidiropoulou36, A. Sidoti23b,23a, F. Siegert48, Dj. Sijacki16, M.Jr. Silva180, M.V. Silva Oliveira81a, S.B. Silverstein45a, S. Simion65, R. Simoniello100, C.J. Simpson-allsop21, S. Simsek12b, P. Sinervo166, V. Sinetckii113, S. Singh151, M. Sioli23b,23a, I. Siral131, S.Yu. Sivoklokov113, J. Sj¨olin45a,45b, A. Skaf53, E. Skorda97, P. Skubic128, M. Slawinska85, K. Sliwa169, R. Slovak142, V. Smakhtin179, B.H. Smart143, J. Smiesko28b, N. Smirnov112, S.Yu. Smirnov112, Y. Smirnov112, L.N. Smirnova113,s, O. Smirnova97, J.W. Smith53, M. Smizanska90, K. Smolek141, A. Smykiewicz85, A.A. Snesarev111, H.L. Snoek120, I.M. Snyder131, S. Snyder29, R. Sobie175,ac, A. Soffer160, A. Søgaard50, F. Sohns53, C.A. Solans Sanchez36, E.Yu. Soldatov112, U. Soldevila173, A.A. Solodkov123, A. Soloshenko80, O.V. Solovyanov123, V. Solovyev137, P. Sommer148, H. Son169, W. Song143, W.Y. Song167b, A. Sopczak141, A.L. Sopio95, F. Sopkova28b, C.L. Sotiropoulou72a,72b, S. Sottocornola71a,71b, R. Soualah67a,67c,f, A.M. Soukharev122b,122a, D. South46, S. Spagnolo68a,68b, M. Spalla115, – 38 – JHEP08(2020)051 M. Spangenberg177, F. Span`o94, D. Sperlich52, T.M. Spieker61a, G. Spigo36, M. Spina155, D.P. Spiteri57, M. Spousta142, A. Stabile69a,69b, B.L. Stamas121, R. Stamen61a, M. Stamenkovic120, E. Stanecka85, B. Stanislaus134, M.M. Stanitzki46, M. Stankaityte134, B. Stapf120, E.A. Starchenko123, G.H. Stark145, J. Stark58, P. Staroba140, P. Starovoitov61a, S. St¨arz104, R. Staszewski85, G. Stavropoulos44, M. Stegler46, P. Steinberg29, A.L. Steinhebel131, B. Stelzer151, H.J. Stelzer138, O. Stelzer-Chilton167a, H. Stenzel56, T.J. Stevenson155, G.A. Stewart36, M.C. Stockton36, G. Stoicea27b, M. Stolarski139a, S. Stonjek115, A. Straessner48, J. Strandberg153, S. Strandberg45a,45b, M. Strauss128, P. Strizenec28b, R. Str¨ohmer176, D.M. Strom131, R. Stroynowski42, A. Strubig50, S.A. Stucci29, B. Stugu17, J. Stupak128, N.A. Styles46, D. Su152, W. Su60c, S. Suchek61a, V.V. Sulin111, M.J. Sullivan91, D.M.S. Sultan54, S. Sultansoy4c, T. Sumida86, S. Sun106, X. Sun101, K. Suruliz155, C.J.E. Suster156, M.R. Sutton155, S. Suzuki82, M. Svatos140, M. Swiatlowski167a, S.P. Swift2, T. Swirski176, A. Sydorenko100, I. Sykora28a, M. Sykora142, T. Sykora142, D. Ta100, K. Tackmann46,y, J. Taenzer160, A. Taffard170, R. Tafirout167a, R. Takashima87, K. Takeda83, T. Takeshita149, E.P. Takeva50, Y. Takubo82, M. Talby102, A.A. Talyshev122b,122a, K.C. Tam63b, N.M. Tamir160, J. Tanaka162, R. Tanaka65, S. Tapia Araya172, S. Tapprogge100, A. Tarek Abouelfadl Mohamed107, S. Tarem159, K. Tariq60b, G. Tarna27b,c, G.F. Tartarelli69a, P. Tas142, M. Tasevsky140, T. Tashiro86, E. Tassi41b,41a, A. Tavares Delgado139a, Y. Tayalati35e, A.J. Taylor50, G.N. Taylor105, W. Taylor167b, H. Teagle91, A.S. Tee90, R. Teixeira De Lima152, P. Teixeira-Dias94, H. Ten Kate36, J.J. Teoh120, S. Terada82, K. Terashi162, J. Terron99, S. Terzo14, M. Testa51, R.J. Teuscher166,ac, S.J. Thais182, N. Themistokleous50, T. Theveneaux-Pelzer46, F. Thiele40, D.W. Thomas94, J.O. Thomas42, J.P. Thomas21, E.A. Thompson46, P.D. Thompson21, E. Thomson136, E.J. Thorpe93, R.E. Ticse Torres53, V.O. Tikhomirov111,ai, Yu.A. Tikhonov122b,122a, S. Timoshenko112, P. Tipton182, S. Tisserant102, K. Todome23b,23a, S. Todorova-Nova142, S. Todt48, J. Tojo88, S. Tok´ar28a, K. Tokushuku82, E. Tolley127, K.G. Tomiwa33e, M. Tomoto117, L. Tompkins152, P. Tornambe103, E. Torrence131, H. Torres48, E. Torr´o Pastor147, C. Tosciri134, J. Toth102,ab, D.R. Tovey148, A. Traeet17, C.J. Treado125, T. Trefzger176, F. Tresoldi155, A. 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Vorobev112, M. Vos173, J.H. Vossebeld91, M. Vozak101, N. Vranjes16, M. Vranjes Milosavljevic16, V. Vrba141, M. Vreeswijk120, R. Vuillermet36, I. Vukotic37, S. Wada168, P. Wagner24, W. Wagner181, J. Wagner-Kuhr114, S. Wahdan181, H. Wahlberg89, R. Wakasa168, V.M. Walbrecht115, J. Walder90, R. Walker114, S.D. Walker94, W. Walkowiak150, V. Wallangen45a,45b, A.M. Wang59, A.Z. Wang180, C. Wang60c, F. Wang180, H. Wang18, H. Wang3, J. Wang63a, J. Wang61b, P. Wang42, Q. Wang128, R.-J. Wang100, R. Wang60a, R. Wang6, S.M. Wang157, W.T. Wang60a, W. Wang15c, W.X. Wang60a, Y. Wang60a, Z. Wang60c, C. Wanotayaroj46, A. Warburton104, C.P. Ward32, D.R. Wardrope95, N. Warrack57, A. Washbrook50, A.T. Watson21, M.F. Watson21, G. Watts147, B.M. Waugh95, A.F. Webb11, C. Weber29, M.S. Weber20, S.A. Weber34, S.M. Weber61a, A.R. Weidberg134, J. Weingarten47, M. Weirich100, C. Weiser52, P.S. Wells36, T. Wenaus29, T. Wengler36, S. Wenig36, N. Wermes24, M.D. Werner79, M. Wessels61a, T.D. Weston20, K. 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Zwalinski36 1Department of Physics, University of Adelaide, Adelaide, Australia 2Physics Department, SUNY Albany, Albany NY, United States of America 3Department of Physics, University of Alberta, Edmonton AB, Canada 4 (a)Department of Physics, Ankara University, Ankara; (b)Istanbul Aydin University, Istanbul; (c)Division of Physics, TOBB University of Economics and Technology, Ankara, Turkey 5LAPP, Universit´e Grenoble Alpes, Universit´e Savoie Mont Blanc, CNRS/IN2P3, Annecy, France 6High Energy Physics Division, Argonne National Laboratory, Argonne IL, United States of America 7Department of Physics, University of Arizona, Tucson AZ, United States of America 8Department of Physics, University of Texas at Arlington, Arlington TX, United States of America 9Physics Department, National and Kapodistrian University of Athens, Athens, Greece – 40 – JHEP08(2020)051 The CMS collaboration Yerevan Physics Institute, Yerevan, Armenia A.M. Sirunyan†, A. Tumasyan Institut f¨ur Hochenergiephysik, Wien, Austria W. Adam, F. Ambrogi, T. Bergauer, M. Dragicevic, J. Er¨o, A. Escalante Del Valle, M. Flechl, R. Fr¨uhwirth1, M. Jeitler1, N. Krammer, I. Kr¨atschmer, D. Liko, T. Madlener, I. Mikulec, N. Rad, J. Schieck1, R. Sch¨ofbeck, M. Spanring, W. Waltenberger, C.-E. Wulz1, M. Zarucki Institute for Nuclear Problems, Minsk, Belarus V. Drugakov, V. Mossolov, J. Suarez Gonzalez Universiteit Antwerpen, Antwerpen, Belgium M.R. Darwish, E.A. De Wolf, D. Di Croce, X. Janssen, T. Kello2, A. Lelek, M. Pieters, H. Rejeb Sfar, H. Van Haevermaet, P. Van Mechelen, S. Van Putte, N. Van Remortel Vrije Universiteit Brussel, Brussel, Belgium F. Blekman, E.S. Bols, S.S. Chhibra, J. D’Hondt, J. De Clercq, D. Lontkovskyi, S. Lowette, I. Marchesini, S. Moortgat, Q. Python, S. Tavernier, W. Van Doninck, P. Van Mulders Universit´e Libre de Bruxelles, Bruxelles, Belgium D. Beghin, B. Bilin, B. Clerbaux, G. De Lentdecker, H. Delannoy, B. Dorney, L. Favart, A. Grebenyuk, A.K. Kalsi, L. Moureaux, A. Popov, N. Postiau, E. Starling, L. Thomas, C. Vander Velde, P. Vanlaer, D. Vannerom Ghent University, Ghent, Belgium T. Cornelis, D. Dobur, I. Khvastunov3, M. Niedziela, C. Roskas, K. Skovpen, M. Tytgat, W. Verbeke, B. Vermassen, M. Vit Universit´e Catholique de Louvain, Louvain-la-Neuve, Belgium G. Bruno, C. Caputo, P. David, C. Delaere, M. Delcourt, A. Giammanco, V. Lemaitre, J. Prisciandaro, A. Saggio, P. Vischia, J. Zobec Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil G.A. Alves, G. Correia Silva, C. Hensel, A. Moraes Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil E. Belchior Batista Das Chagas, W. Carvalho, J. Chinellato4, E. Coelho, E.M. Da Costa, G.G. Da Silveira5, D. De Jesus Damiao, C. De Oliveira Martins, S. Fonseca De Souza, H. Malbouisson, J. Martins6, D. Matos Figueiredo, M. Medina Jaime7, M. Melo De Almeida, C. Mora Herrera, L. Mundim, H. Nogima, W.L. Prado Da Silva, P. Rebello Teles, L.J. Sanchez Rosas, A. Santoro, A. Sznajder, M. Thiel, E.J. Tonelli Manganote4, F. Torres Da Silva De Araujo, A. Vilela Pereira – 47 – JHEP08(2020)051 Universidade Estadual Paulistaa, Universidade Federal do ABCb, S˜ao Paulo, Brazil C.A. Bernardesa, L. Calligarisa, T.R. Fernandez Perez Tomeia, E.M. Gregoresb, D.S. Lemos, P.G. Mercadanteb, S.F. Novaesa, SandraS. Padulaa Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria A. Aleksandrov, G. Antchev, R. Hadjiiska, P. Iaydjiev, M. Misheva, M. Rodozov, M. Shopova, G. Sultanov University of Sofia, Sofia, Bulgaria M. Bonchev, A. Dimitrov, T. Ivanov, L. Litov, B. Pavlov, P. Petkov, A. Petrov Beihang University, Beijing, China W. Fang2, X. Gao2, L. Yuan Department of Physics, Tsinghua University, Beijing, China M. Ahmad, Z. Hu, Y. Wang Institute of High Energy Physics, Beijing, China G.M. Chen8, H.S. Chen8, M. Chen, C.H. Jiang, D. Leggat, H. Liao, Z. Liu, A. Spiezia, J. Tao, E. Yazgan, H. Zhang, S. Zhang8, J. Zhao State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China A. Agapitos, Y. Ban, G. Chen, A. Levin, J. Li, L. Li, Q. Li, Y. Mao, S.J. Qian, D. Wang, Q. Wang Zhejiang University, Hangzhou, China M. Xiao Universidad de Los Andes, Bogota, Colombia C. Avila, A. Cabrera, C. Florez, C.F. Gonz´alez Hern´andez, M.A. Segura Delgado Universidad de Antioquia, Medellin, Colombia J. Mejia Guisao, J.D. Ruiz Alvarez, C.A. Salazar Gonz´alez, N. Vanegas Arbelaez University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia D. Giljanovi´c, N. Godinovic, D. Lelas, I. Puljak, T. Sculac University of Split, Faculty of Science, Split, Croatia Z. Antunovic, M. Kovac Institute Rudjer Boskovic, Zagreb, Croatia V. Brigljevic, D. Ferencek, K. Kadija, B. Mesic, M. Roguljic, A. Starodumov9, T. Susa University of Cyprus, Nicosia, Cyprus M.W. Ather, A. Attikis, E. Erodotou, A. Ioannou, M. Kolosova, S. Konstantinou, G. Mavromanolakis, J. Mousa, C. Nicolaou, F. Ptochos, P.A. Razis, H. Rykaczewski, H. Saka, D. Tsiakkouri – 48 – JHEP08(2020)051 Charles University, Prague, Czech Republic M. Finger10, M. Finger Jr.10, A. Kveton, J. Tomsa Escuela Politecnica Nacional, Quito, Ecuador E. Ayala Universidad San Francisco de Quito, Quito, Ecuador E. Carrera Jarrin Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt A.A. Abdelalim11,12, S. Abu Zeid13 National Institute of Chemical Physics and Biophysics, Tallinn, Estonia S. Bhowmik, A. Carvalho Antunes De Oliveira, R.K. Dewanjee, K. Ehataht, M. Kadastik, M. Raidal, C. Veelken Department of Physics, University of Helsinki, Helsinki, Finland P. Eerola, L. Forthomme, H. Kirschenmann, K. Osterberg, M. Voutilainen Helsinki Institute of Physics, Helsinki, Finland F. Garcia, J. Havukainen, J.K. Heikkil¨a, V. Karim¨aki, M.S. Kim, R. Kinnunen, T. Lamp´en, K. Lassila-Perini, S. Laurila, S. Lehti, T. Lind´en, H. Siikonen, E. Tuominen, J. Tuominiemi Lappeenranta University of Technology, Lappeenranta, Finland P. Luukka, T. Tuuva IRFU, CEA, Universit´e Paris-Saclay, Gif-sur-Yvette, France M. Besancon, F. Couderc, M. Dejardin, D. Denegri, B. Fabbro, J.L. Faure, F. Ferri, S. Ganjour, A. Givernaud, P. Gras, G. Hamel de Monchenault, P. Jarry, C. Leloup, B. Lenzi, E. Locci, J. Malcles, J. Rander, A. Rosowsky, M. ¨ O. Sahin, A. Savoy-Navarro14, M. Titov, G.B. Yu Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris S. Ahuja, C. Amendola, F. Beaudette, M. Bonanomi, P. Busson, C. Charlot, B. Diab, G. Falmagne, R. Granier de Cassagnac, I. Kucher, A. Lobanov, C. Martin Perez, M. Nguyen, C. Ochando, P. Paganini, J. Rembser, R. Salerno, J.B. Sauvan, Y. Sirois, A. Zabi, A. Zghiche Universit´e de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France J.-L. Agram15, J. Andrea, D. Bloch, G. Bourgatte, J.-M. Brom, E.C. Chabert, C. Collard, E. Conte15, J.-C. Fontaine15, D. Gel´e, U. Goerlach, C. Grimault, A.-C. Le Bihan, N. Tonon, P. Van Hove Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France S. Gadrat – 49 – JHEP08(2020)051 Universit´e de Lyon, Universit´e Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucl´eaire de Lyon, Villeurbanne, France S. Beauceron, C. Bernet, G. Boudoul, C. Camen, A. Carle, N. Chanon, R. Chierici, D. Contardo, P. Depasse, H. El Mamouni, J. Fay, S. Gascon, M. Gouzevitch, B. Ille, Sa. Jain, I.B. Laktineh, H. Lattaud, A. Lesauvage, M. Lethuillier, L. Mirabito, S. Perries, V. Sordini, L. Torterotot, G. Touquet, M. Vander Donckt, S. Viret Georgian Technical University, Tbilisi, Georgia A. Khvedelidze10 Tbilisi State University, Tbilisi, Georgia Z. Tsamalaidze10 RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany C. Autermann, L. Feld, K. Klein, M. Lipinski, D. Meuser, A. Pauls, M. Preuten, M.P. Rauch, J. Schulz, M. Teroerde RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany M. Erdmann, B. Fischer, S. Ghosh, T. Hebbeker, K. Hoepfner, H. Keller, L. Mastrolorenzo, M. Merschmeyer, A. Meyer, P. Millet, G. Mocellin, S. Mondal, S. Mukherjee, D. Noll, A. Novak, T. Pook, A. Pozdnyakov, T. Quast, M. Radziej, Y. Rath, H. Reithler, J. Roemer, A. Schmidt, S.C. Schuler, A. Sharma, S. Wiedenbeck, S. Zaleski RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany G. Fl¨ugge, W. Haj Ahmad16, O. Hlushchenko, T. Kress, T. M¨uller, A. Nowack, C. Pistone, O. Pooth, D. Roy, H. Sert, A. Stahl17 Deutsches Elektronen-Synchrotron, Hamburg, Germany M. Aldaya Martin, P. Asmuss, I. Babounikau, H. Bakhshiansohi, K. Beernaert, O. Behnke, A. Berm´udez Mart´ınez, A.A. Bin Anuar, K. Borras18, V. Botta, A. Campbell, A. Cardini, P. Connor, S. Consuegra Rodr´ıguez, C. Contreras-Campana, V. Danilov, A. De Wit, M.M. Defranchis, C. Diez Pardos, D. Dom´ınguez Damiani, G. Eckerlin, D. Eckstein, T. Eichhorn, A. Elwood, E. Eren, E. Gallo19, A. Geiser, A. Grohsjean, M. Guthoff, M. Haranko, A. Harb, A. Jafari, N.Z. Jomhari, H. Jung, A. Kasem18, M. Kasemann, H. Kaveh, J. Keaveney, C. Kleinwort, J. Knolle, D. Kr¨ucker, W. Lange, T. Lenz, J. Lidrych, K. Lipka, W. Lohmann20, R. Mankel, I.-A. Melzer-Pellmann, A.B. Meyer, M. Meyer, M. Missiroli, J. Mnich, A. Mussgiller, V. Myronenko, D. P´erez Ad´an, S.K. Pflitsch, D. Pitzl, A. Raspereza, A. Saibel, M. Savitskyi, V. Scheurer, P. Sch¨utze, C. Schwanenberger, R. Shevchenko, A. Singh, R.E. Sosa Ricardo, H. Tholen, O. Turkot, A. Vagnerini, M. Van De Klundert, R. Walsh, Y. Wen, K. Wichmann, C. Wissing, O. Zenaiev, R. Zlebcik University of Hamburg, Hamburg, Germany R. Aggleton, S. Bein, L. Benato, A. Benecke, T. Dreyer, A. Ebrahimi, F. Feindt, A. Fr¨ohlich, C. Garbers, E. Garutti, D. Gonzalez, P. Gunnellini, J. Haller, A. Hinzmann, A. Karavdina, G. Kasieczka, R. Klanner, R. Kogler, N. Kovalchuk, S. Kurz, V. Kutzner, J. Lange, T. Lange, A. Malara, J. Multhaup, C.E.N. Niemeyer, A. Reimers, – 50 – JHEP08(2020)051 O. Rieger, P. Schleper, S. Schumann, J. Schwandt, J. Sonneveld, H. Stadie, G. Steinbr¨uck, B. Vormwald, I. Zoi Karlsruher Institut fuer Technologie, Karlsruhe, Germany M. Akbiyik, M. Baselga, S. Baur, T. Berger, E. Butz, R. Caspart, T. Chwalek, W. De Boer, A. Dierlamm, K. El Morabit, N. Faltermann, M. Giffels, A. Gottmann, F. Hartmann17, C. Heidecker, U. Husemann, M.A. Iqbal, S. Kudella, S. Maier, S. Mitra, M.U. Mozer, D. M¨uller, Th. M¨uller, M. Musich, A. N¨urnberg, G. Quast, K. Rabbertz, D. Savoiu, D. Sch¨afer, M. Schnepf, M. Schr¨oder, I. Shvetsov, H.J. Simonis, R. Ulrich, M. Wassmer, M. Weber, C. W¨ohrmann, R. Wolf, S. Wozniewski Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece G. Anagnostou, P. Asenov, G. Daskalakis, T. Geralis, A. Kyriakis, D. Loukas, G. Paspalaki, A. Stakia National and Kapodistrian University of Athens, Athens, Greece M. Diamantopoulou, G. Karathanasis, P. Kontaxakis, A. Manousakis-katsikakis, A. Panagiotou, I. Papavergou, N. Saoulidou, K. Theofilatos, K. Vellidis, E. Vourliotis National Technical University of Athens, Athens, Greece G. Bakas, K. Kousouris, I. Papakrivopoulos, G. Tsipolitis, A. Zacharopoulou University of Io´annina, Io´annina, Greece I. Evangelou, C. Foudas, P. Gianneios, P. Katsoulis, P. Kokkas, S. Mallios, K. Manitara, N. Manthos, I. Papadopoulos, J. Strologas, F.A. Triantis, D. Tsitsonis MTA-ELTE Lend¨ulet CMS Particle and Nuclear Physics Group, E¨otv¨os Lor´and University, Budapest, Hungary M. Bart´ok21, R. Chudasama, M. Csanad, P. Major, K. Mandal, A. Mehta, G. Pasztor, O. Sur´anyi, G.I. Veres Wigner Research Centre for Physics, Budapest, Hungary G. Bencze, C. Hajdu, D. Horvath22, F. Sikler, V. Veszpremi, G. Vesztergombi† Institute of Nuclear Research ATOMKI, Debrecen, Hungary N. Beni, S. Czellar, J. Karancsi21, J. Molnar, Z. Szillasi Institute of Physics, University of Debrecen, Debrecen, Hungary P. Raics, D. Teyssier, Z.L. Trocsanyi, B. Ujvari Eszterhazy Karoly University, Karoly Robert Campus, Gyongyos, Hungary T. Csorgo, W.J. Metzger, F. Nemes, T. Novak Indian Institute of Science (IISc), Bangalore, India S. Choudhury, J.R. Komaragiri, P.C. Tiwari – 51 – JHEP08(2020)051 National Institute of Science Education and Research, HBNI, Bhubaneswar, India S. Bahinipati24, C. Kar, G. Kole, P. Mal, V.K. Muraleedharan Nair Bindhu, A. Nayak25, D.K. Sahoo24, S.K. Swain Panjab University, Chandigarh, India S. Bansal, S.B. Beri, V. Bhatnagar, S. Chauhan, N. Dhingra26, R. Gupta, A. Kaur, M. Kaur, S. Kaur, P. Kumari, M. Lohan, M. Meena, K. Sandeep, S. Sharma, J.B. Singh, A.K. Virdi, G. Walia University of Delhi, Delhi, India A. Bhardwaj, B.C. Choudhary, R.B. Garg, M. Gola, S. Keshri, Ashok Kumar, M. Naimuddin, P. Priyanka, K. Ranjan, Aashaq Shah, R. Sharma Saha Institute of Nuclear Physics, HBNI, Kolkata, India R. Bhardwaj27, M. Bharti27, R. Bhattacharya, S. Bhattacharya, U. Bhawandeep27, D. Bhowmik, S. Dutta, S. Ghosh, B. Gomber28, M. Maity29, K. Mondal, S. Nandan, A. Purohit, P.K. Rout, G. Saha, S. Sarkar, M. Sharan, B. Singh27, S. Thakur27 Indian Institute of Technology Madras, Madras, India P.K. Behera, S.C. Behera, P. Kalbhor, A. Muhammad, P.R. Pujahari, A. Sharma, A.K. Sikdar Bhabha Atomic Research Centre, Mumbai, India D. Dutta, V. Jha, D.K. Mishra, P.K. Netrakanti, L.M. Pant, P. Shukla Tata Institute of Fundamental Research-A, Mumbai, India T. Aziz, M.A. Bhat, S. Dugad, G.B. Mohanty, N. Sur, RavindraKumar Verma Tata Institute of Fundamental Research-B, Mumbai, India S. Banerjee, S. Bhattacharya, S. Chatterjee, P. Das, M. Guchait, S. Karmakar, S. Kumar, G. Majumder, K. Mazumdar, N. Sahoo, S. Sawant Indian Institute of Science Education and Research (IISER), Pune, India S. Dube, B. Kansal, A. Kapoor, K. Kothekar, S. Pandey, A. Rane, A. Rastogi, S. Sharma Institute for Research in Fundamental Sciences (IPM), Tehran, Iran S. Chenarani, S.M. Etesami, M. Khakzad, M. Mohammadi Najafabadi, M. Naseri, F. Rezaei Hosseinabadi University College Dublin, Dublin, Ireland M. Felcini, M. Grunewald INFN Sezione di Baria, Universit`a di Barib, Politecnico di Baric, Bari, Italy M. Abbresciaa,b, R. Alya,b,30, C. Calabriaa,b, A. Colaleoa, D. Creanzaa,c, L. Cristellaa,b, N. De Filippisa,c, M. De Palmaa,b, A. Di Florioa,b, W. Elmetenaweea,b, L. Fiorea, A. Gelmia,b, G. Iasellia,c, M. Incea,b, S. Lezkia,b, G. Maggia,c, M. Maggia, J.A. Merlina, G. Minielloa,b, S. Mya,b, S. Nuzzoa,b, A. Pompilia,b, G. Pugliesea,c, R. Radognaa, A. Ranieria, G. Selvaggia,b, L. Silvestrisa, F.M. Simonea,b, R. Vendittia, P. Verwilligena – 52 – JHEP08(2020)051 INFN Sezione di Bolognaa, Universit`a di Bolognab, Bologna, Italy G. Abbiendia, C. Battilanaa,b, D. Bonacorsia,b, L. Borgonovia,b, S. Braibant-Giacomellia,b, R. Campaninia,b, P. Capiluppia,b, A. Castroa,b, F.R. Cavalloa, C. Cioccaa, G. Codispotia,b, M. Cuffiania,b, G.M. Dallavallea, F. Fabbria, A. Fanfania,b, E. Fontanesia,b, P. Giacomellia, C. Grandia, L. Guiduccia,b, F. Iemmia,b, S. Lo Meoa,31, S. Marcellinia, G. Masettia, F.L. Navarriaa,b, A. Perrottaa, F. Primaveraa,b, A.M. Rossia,b, T. Rovellia,b, G.P. Sirolia,b, N. Tosia INFN Sezione di Cataniaa, Universit`a di Cataniab, Catania, Italy S. Albergoa,b,32, S. Costaa,b, A. Di Mattiaa, R. Potenzaa,b, A. Tricomia,b,32, C. Tuvea,b INFN Sezione di Firenzea, Universit`a di Firenzeb, Firenze, Italy G. Barbaglia, A. Cassesea, R. Ceccarellia,b, V. Ciullia,b, C. Civininia, R. D’Alessandroa,b, F. Fioria,c, E. Focardia,b, G. Latinoa,b, P. Lenzia,b, M. Meschinia, S. Paolettia, G. Sguazzonia, L. Viliania INFN Laboratori Nazionali di Frascati, Frascati, Italy L. Benussi, S. Bianco, D. Piccolo INFN Sezione di Genovaa, Universit`a di Genovab, Genova, Italy M. Bozzoa,b, F. Ferroa, R. Mulargiaa,b, E. Robuttia, S. Tosia,b INFN Sezione di Milano-Bicoccaa, Universit`a di Milano-Bicoccab, Milano, Italy A. Benagliaa, A. Beschia,b, F. Brivioa,b, V. Cirioloa,b,17, M.E. Dinardoa,b, P. Dinia, S. Gennaia, A. Ghezzia,b, P. Govonia,b, L. Guzzia,b, M. Malbertia, S. Malvezzia, D. Menascea, F. Montia,b, L. Moronia, M. Paganonia,b, D. Pedrinia, S. Ragazzia,b, T. Tabarelli de Fatisa,b, D. Valsecchia,b,17, D. Zuoloa,b INFN Sezione di Napolia, Universit`a di Napoli ‘Federico II’b, Napoli, Italy, Universit`a della Basilicatac, Potenza, Italy, Universit`a G. Marconid, Roma, Italy S. Buontempoa, N. Cavalloa,c, A. De Iorioa,b, A. Di Crescenzoa,b, F. Fabozzia,c, F. Fiengaa, G. Galatia, A.O.M. Iorioa,b, L. Layera,b, L. Listaa,b, S. Meolaa,d,17, P. Paoluccia,17, B. Rossia, C. Sciaccaa,b, E. Voevodinaa,b INFN Sezione di Padovaa, Universit`a di Padovab, Padova, Italy, Universit`a di Trentoc, Trento, Italy P. Azzia, N. Bacchettaa, D. Biselloa,b, A. Bolettia,b, A. Bragagnoloa,b, R. Carlina,b, P. Checchiaa, P. De Castro Manzanoa, T. Dorigoa, U. Dossellia, F. Gasparinia,b, U. Gasparinia,b, A. Gozzelinoa, S.Y. Hoha,b, M. Margonia,b, A.T. Meneguzzoa,b, J. Pazzinia,b, M. Presillab, P. Ronchesea,b, R. Rossina,b, F. Simonettoa,b, A. Tikoa, M. Tosia,b, M. Zanettia,b, P. Zottoa,b, A. Zucchettaa,b, G. Zumerlea,b INFN Sezione di Paviaa, Universit`a di Paviab, Pavia, Italy A. Braghieria, D. Fiorinaa,b, P. Montagnaa,b, S.P. Rattia,b, V. Rea, M. Ressegottia,b, C. Riccardia,b, P. Salvinia, I. Vaia, P. Vituloa,b – 53 – JHEP08(2020)051 INFN Sezione di Perugiaa, Universit`a di Perugiab, Perugia, Italy M. Biasinia,b, G.M. Bileia, D. Ciangottinia,b, L. Fan`oa,b, P. Laricciaa,b, R. Leonardia,b, E. Manonia, G. Mantovania,b, V. Mariania,b, M. Menichellia, A. Rossia,b, A. Santocchiaa,b, D. Spigaa INFN Sezione di Pisaa, Universit`a di Pisab, Scuola Normale Superiore di Pisac, Pisa, Italy K. Androsova, P. Azzurria, G. Bagliesia, V. Bertacchia,c, L. Bianchinia, T. Boccalia, R. Castaldia, M.A. Cioccia,b, R. Dell’Orsoa, S. Donatoa, L. Gianninia,c, A. Giassia, M.T. Grippoa, F. Ligabuea,c, E. Mancaa,c, G. Mandorlia,c, A. Messineoa,b, F. Pallaa, A. Rizzia,b, G. Rolandia,c, S. Roy Chowdhurya,c, A. Scribanoa, P. Spagnoloa, R. Tenchinia, G. Tonellia,b, N. Turinia, A. Venturia, P.G. Verdinia INFN Sezione di Romaa, Sapienza Universit`a di Romab, Rome, Italy F. Cavallaria, M. Cipriania,b, D. Del Rea,b, E. Di Marcoa, M. Diemoza, E. Longoa,b, P. Meridiania, G. Organtinia,b, F. Pandolfia, R. Paramattia,b, C. Quarantaa,b, S. Rahatloua,b, C. Rovellia, F. Santanastasioa,b, L. Soffia,b, R. Tramontanoa,b INFN Sezione di Torinoa, Universit`a di Torinob, Torino, Italy, Universit`a del Piemonte Orientalec, Novara, Italy N. Amapanea,b, R. Arcidiaconoa,c, S. Argiroa,b, M. Arneodoa,c, N. Bartosika, R. Bellana,b, A. Belloraa,b, C. Biinoa, A. Cappatia,b, N. Cartigliaa, S. Comettia, M. Costaa,b, R. Covarellia,b, N. Demariaa, J.R. Gonz´alez Fern´andeza, B. Kiania,b, F. Leggera, C. Mariottia, S. Masellia, E. Migliorea,b, V. Monacoa,b, E. Monteila,b, M. Montenoa, M.M. Obertinoa,b, G. Ortonaa, L. Pachera,b, N. Pastronea, M. Pelliccionia, G.L. Pinna Angionia,b, A. Romeroa,b, M. Ruspaa,c, R. Salvaticoa,b, V. Solaa, A. Solanoa,b, D. Soldia,b, A. Staianoa, D. Trocinoa,b INFN Sezione di Triestea, Universit`a di Triesteb, Trieste, Italy S. Belfortea, V. Candelisea,b, M. Casarsaa, F. Cossuttia, A. Da Rolda,b, G. Della Riccaa,b, F. Vazzolera,b, A. Zanettia Kyungpook National University, Daegu, Korea B. Kim, D.H. Kim, G.N. Kim, J. Lee, S.W. Lee, C.S. Moon, Y.D. Oh, S.I. Pak, S. Sekmen, D.C. Son, Y.C. Yang Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea H. Kim, D.H. Moon Hanyang University, Seoul, Korea B. Francois, T.J. Kim, J. Park Korea University, Seoul, Korea S. Cho, S. Choi, Y. Go, S. Ha, B. Hong, K. Lee, K.S. Lee, J. Lim, J. Park, S.K. Park, Y. Roh, J. Yoo – 54 – JHEP08(2020)051 Kyung Hee University, Department of Physics J. Goh Sejong University, Seoul, Korea H.S. Kim Seoul National University, Seoul, Korea J. Almond, J.H. Bhyun, J. Choi, S. Jeon, J. Kim, J.S. Kim, H. Lee, K. Lee, S. Lee, K. Nam, M. Oh, S.B. Oh, B.C. Radburn-Smith, U.K. Yang, H.D. Yoo, I. Yoon University of Seoul, Seoul, Korea D. Jeon, J.H. Kim, J.S.H. Lee, I.C. Park, I.J Watson Sungkyunkwan University, Suwon, Korea Y. Choi, C. Hwang, Y. Jeong, J. Lee, Y. Lee, I. Yu Riga Technical University, Riga, Latvia V. Veckalns33 Vilnius University, Vilnius, Lithuania V. Dudenas, A. Juodagalvis, A. Rinkevicius, G. Tamulaitis, J. Vaitkus National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia F. Mohamad Idris34, W.A.T. Wan Abdullah, M.N. Yusli, Z. Zolkapli Universidad de Sonora (UNISON), Hermosillo, Mexico J.F. Benitez, A. Castaneda Hernandez, J.A. Murillo Quijada, L. Valencia Palomo Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico H. Castilla-Valdez, E. De La Cruz-Burelo, I. Heredia-De La Cruz35, R. Lopez-Fernandez, A. Sanchez-Hernandez Universidad Iberoamericana, Mexico City, Mexico S. Carrillo Moreno, C. Oropeza Barrera, M. Ramirez-Garcia, F. Vazquez Valencia Benemerita Universidad Autonoma de Puebla, Puebla, Mexico J. Eysermans, I. Pedraza, H.A. Salazar Ibarguen, C. Uribe Estrada Universidad Aut´onoma de San Luis Potos´ı, San Luis Potos´ı, Mexico A. Morelos Pineda University of Montenegro, Podgorica, Montenegro J. Mijuskovic3, N. Raicevic University of Auckland, Auckland, New Zealand D. Krofcheck University of Canterbury, Christchurch, New Zealand S. Bheesette, P.H. Butler, P. Lujan – 55 – JHEP08(2020)051 National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan A. Ahmad, M. Ahmad, M.I.M. Awan, Q. Hassan, H.R. Hoorani, W.A. Khan, M.A. Shah, M. Shoaib, M. Waqas AGH University of Science and Technology Faculty of Computer Science, Electronics and Telecommunications, Krakow, Poland V. Avati, L. Grzanka, M. Malawski National Centre for Nuclear Research, Swierk, Poland H. Bialkowska, M. Bluj, B. Boimska, M. G´orski, M. Kazana, M. Szleper, P. Zalewski Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland K. Bunkowski, A. Byszuk36, K. Doroba, A. Kalinowski, M. Konecki, J. Krolikowski, M. Olszewski, M. Walczak Laborat´orio de Instrumenta¸c˜ao e F´ısica Experimental de Part´ıculas, Lisboa, Portugal M. Araujo, P. Bargassa, D. Bastos, A. Di Francesco, P. Faccioli, B. Galinhas, M. Gallinaro, J. Hollar, N. Leonardo, T. Niknejad, J. Seixas, K. Shchelina, G. Strong, O. Toldaiev, J. Varela Joint Institute for Nuclear Research, Dubna, Russia S. Afanasiev, V. Alexakhin, P. Bunin, M. Gavrilenko, I. Golutvin, I. Gorbunov, A. Kamenev, V. Karjavine, A. Lanev, A. Malakhov, V. Matveev37,38, P. Moisenz, V. Palichik, V. Perelygin, M. Savina, S. Shmatov, S. Shulha, V. Smirnov, N. Voytishin, A. Zarubin Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia L. Chtchipounov, V. Golovtcov, Y. Ivanov, V. Kim39, E. Kuznetsova40, P. Levchenko, V. Murzin, V. Oreshkin, I. Smirnov, D. Sosnov, V. Sulimov, L. Uvarov, A. Vorobyev Institute for Nuclear Research, Moscow, Russia Yu. Andreev, A. Dermenev, S. Gninenko, N. Golubev, A. Karneyeu, M. Kirsanov, N. Krasnikov, A. Pashenkov, D. Tlisov, A. Toropin Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘Kurchatov Institute’, Moscow, Russia V. Epshteyn, V. Gavrilov, N. Lychkovskaya, A. Nikitenko41, V. Popov, I. Pozdnyakov, G. Safronov, A. Spiridonov, A. Stepennov, M. Toms, E. Vlasov, A. Zhokin Moscow Institute of Physics and Technology, Moscow, Russia T. Aushev National Research Nuclear University ‘Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia M. Chadeeva42, P. Parygin, D. Philippov, V. Rusinov, E. Zhemchugov – 56 – JHEP08(2020)051 University of Nebraska-Lincoln, Lincoln, U.S.A. K. Bloom, S. Chauhan, D.R. Claes, C. Fangmeier, L. Finco, F. Golf, R. Kamalieddin, I. Kravchenko, J.E. Siado, G.R. Snow†, B. Stieger, W. Tabb State University of New York at Buffalo, Buffalo, U.S.A. G. Agarwal, C. Harrington, I. Iashvili, A. Kharchilava, C. McLean, D. Nguyen, A. Parker, J. Pekkanen, S. Rappoccio, B. Roozbahani Northeastern University, Boston, U.S.A. G. Alverson, E. Barberis, C. Freer, Y. Haddad, A. Hortiangtham, G. Madigan, B. Marzocchi, D.M. Morse, V. Nguyen, T. Orimoto, L. Skinnari, A. Tishelman-Charny, T. Wamorkar, B. Wang, A. Wisecarver, D. Wood Northwestern University, Evanston, U.S.A. S. Bhattacharya, J. Bueghly, G. Fedi, A. Gilbert, T. Gunter, K.A. Hahn, N. Odell, M.H. Schmitt, K. Sung, M. Velasco University of Notre Dame, Notre Dame, U.S.A. R. Bucci, N. Dev, R. Goldouzian, M. Hildreth, K. Hurtado Anampa, C. Jessop, D.J. Karmgard, K. Lannon, W. Li, N. Loukas, N. Marinelli, I. Mcalister, F. Meng, Y. Musienko37, R. Ruchti, P. Siddireddy, G. Smith, S. Taroni, M. Wayne, A. Wightman, M. Wolf The Ohio State University, Columbus, U.S.A. J. Alimena, B. Bylsma, B. Cardwell, L.S. Durkin, B. Francis, C. Hill, W. Ji, A. Lefeld, T.Y. Ling, B.L. Winer Princeton University, Princeton, U.S.A. G. Dezoort, P. Elmer, J. Hardenbrook, N. Haubrich, S. Higginbotham, A. Kalogeropoulos, S. Kwan, D. Lange, M.T. Lucchini, J. Luo, D. Marlow, K. Mei, I. Ojalvo, J. Olsen, C. Palmer, P. Pirou´e, D. Stickland, C. Tully University of Puerto Rico, Mayaguez, U.S.A. S. Malik, S. Norberg Purdue University, West Lafayette, U.S.A. A. Barker, V.E. Barnes, R. Chawla, S. Das, L. Gutay, M. Jones, A.W. Jung, B. Mahakud, D.H. Miller, G. Negro, N. Neumeister, C.C. Peng, S. Piperov, H. Qiu, J.F. Schulte, N. Trevisani, F. Wang, R. Xiao, W. Xie Purdue University Northwest, Hammond, U.S.A. T. Cheng, J. Dolen, N. Parashar Rice University, Houston, U.S.A. A. Baty, U. Behrens, S. Dildick, K.M. Ecklund, S. Freed, F.J.M. Geurts, M. Kilpatrick, Arun Kumar, W. Li, B.P. Padley, R. Redjimi, J. Roberts, J. Rorie, W. Shi, A.G. Stahl Leiton, Z. Tu, A. Zhang – 63 – JHEP08(2020)051 University of Rochester, Rochester, U.S.A. A. Bodek, P. de Barbaro, R. Demina, J.L. Dulemba, C. Fallon, T. Ferbel, M. Galanti, A. Garcia-Bellido, O. Hindrichs, A. Khukhunaishvili, E. Ranken, R. Taus Rutgers, The State University of New Jersey, Piscataway, U.S.A. B. Chiarito, J.P. Chou, A. Gandrakota, Y. Gershtein, E. Halkiadakis, A. Hart, M. Heindl, E. Hughes, S. Kaplan, I. Laflotte, A. Lath, R. Montalvo, K. Nash, M. Osherson, S. Salur, S. Schnetzer, S. Somalwar, R. Stone, S. Thomas University of Tennessee, Knoxville, U.S.A. H. Acharya, A.G. Delannoy, S. Spanier Texas A&M University, College Station, U.S.A. O. Bouhali79, M. Dalchenko, M. De Mattia, A. Delgado, R. Eusebi, J. Gilmore, T. Huang, T. Kamon80, H. Kim, S. Luo, S. Malhotra, D. Marley, R. Mueller, D. Overton, L. Perni`e, D. Rathjens, A. Safonov Texas Tech University, Lubbock, U.S.A. N. Akchurin, J. Damgov, F. De Guio, V. Hegde, S. Kunori, K. Lamichhane, S.W. Lee, T. Mengke, S. Muthumuni, T. Peltola, S. Undleeb, I. Volobouev, Z. Wang, A. Whitbeck Vanderbilt University, Nashville, U.S.A. S. Greene, A. Gurrola, R. Janjam, W. Johns, C. Maguire, A. Melo, H. Ni, K. Padeken, F. Romeo, P. Sheldon, S. Tuo, J. Velkovska, M. Verweij University of Virginia, Charlottesville, U.S.A. M.W. Arenton, P. Barria, B. Cox, G. Cummings, J. Hakala, R. Hirosky, M. Joyce, A. Ledovskoy, C. Neu, B. Tannenwald, Y. Wang, E. Wolfe, F. Xia Wayne State University, Detroit, U.S.A. R. Harr, P.E. Karchin, N. Poudyal, J. Sturdy, P. Thapa University of Wisconsin — Madison, Madison, WI, U.S.A. K. Black, T. Bose, J. Buchanan, C. Caillol, D. Carlsmith, S. Dasu, I. De Bruyn, L. Dodd, C. Galloni, H. He, M. Herndon, A. Herv´e, U. Hussain, A. Lanaro, A. Loeliger, R. Loveless, J. Madhusudanan Sreekala, A. Mallampalli, D. Pinna, T. Ruggles, A. Savin, V. Sharma, W.H. Smith, D. Teague, S. Trembath-reichert †: Deceased 1: Also at Vienna University of Technology, Vienna, Austria 2: Also at Universit´e Libre de Bruxelles, Bruxelles, Belgium 3: Also at IRFU, CEA, Universit´e Paris-Saclay, Gif-sur-Yvette, France 4: Also at Universidade Estadual de Campinas, Campinas, Brazil 5: Also at Federal University of Rio Grande do Sul, Porto Alegre, Brazil 6: Also at UFMS, Nova Andradina, Brazil 7: Also at Universidade Federal de Pelotas, Pelotas, Brazil 8: Also at University of Chinese Academy of Sciences, Beijing, China – 64 – JHEP08(2020)051 9: Also at Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘Kurchatov Institute’, Moscow, Russia 10: Also at Joint Institute for Nuclear Research, Dubna, Russia 11: Also at Helwan University, Cairo, Egypt 12: Now at Zewail City of Science and Technology, Zewail, Egypt 13: Also at Ain Shams University, Cairo, Egypt 14: Also at Purdue University, West Lafayette, U.S.A. 15: Also at Universit´e de Haute Alsace, Mulhouse, France 16: Also at Erzincan Binali Yildirim University, Erzincan, Turkey 17: Also at CERN, European Organization for Nuclear Research, Geneva, Switzerland 18: Also at RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany 19: Also at University of Hamburg, Hamburg, Germany 20: Also at Brandenburg University of Technology, Cottbus, Germany 21: Also at Institute of Physics, University of Debrecen, Debrecen, Hungary, Debrecen, Hungary 22: Also at Institute of Nuclear Research ATOMKI, Debrecen, Hungary 23: Also at MTA-ELTE Lend¨ulet CMS Particle and Nuclear Physics Group, E¨otv¨os Lor´and University, Budapest, Hungary, Budapest, Hungary 24: Also at IIT Bhubaneswar, Bhubaneswar, India, Bhubaneswar, India 25: Also at Institute of Physics, Bhubaneswar, India 26: Also at G.H.G. Khalsa College, Punjab, India 27: Also at Shoolini University, Solan, India 28: Also at University of Hyderabad, Hyderabad, India 29: Also at University of Visva-Bharati, Santiniketan, India 30: Now at INFN Sezione di Baria, Universit`a di Barib, Politecnico di Baric, Bari, Italy 31: Also at Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Bologna, Italy 32: Also at Centro Siciliano di Fisica Nucleare e di Struttura Della Materia, Catania, Italy 33: Also at Riga Technical University, Riga, Latvia, Riga, Latvia 34: Also at Malaysian Nuclear Agency, MOSTI, Kajang, Malaysia 35: Also at Consejo Nacional de Ciencia y Tecnolog´ıa, Mexico City, Mexico 36: Also at Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland 37: Also at Institute for Nuclear Research, Moscow, Russia 38: Now at National Research Nuclear University ‘Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia 39: Also at St. Petersburg State Polytechnical University, St. Petersburg, Russia 40: Also at University of Florida, Gainesville, U.S.A. 41: Also at Imperial College, London, United Kingdom 42: Also at P.N. Lebedev Physical Institute, Moscow, Russia 43: Also at California Institute of Technology, Pasadena, U.S.A. 44: Also at Budker Institute of Nuclear Physics, Novosibirsk, Russia 45: Also at Faculty of Physics, University of Belgrade, Belgrade, Serbia 46: Also at Universit`a degli Studi di Siena, Siena, Italy 47: Also at INFN Sezione di Paviaa, Universit`a di Paviab, Pavia, Italy, Pavia, Italy 48: Also at National and Kapodistrian University of Athens, Athens, Greece 49: Also at Universit¨at Z¨urich, Zurich, Switzerland 50: Also at Stefan Meyer Institute for Subatomic Physics, Vienna, Austria, Vienna, Austria 51: Also at Burdur Mehmet Akif Ersoy University, BURDUR, Turkey 52: Also at S¸irnak University, Sirnak, Turkey – 65 – JHEP08(2020)051 53: Also at Department of Physics, Tsinghua University, Beijing, China, Beijing, China 54: Also at Near East University, Research Center of Experimental Health Science, Nicosia, Turkey 55: Also at Beykent University, Istanbul, Turkey, Istanbul, Turkey 56: Also at Istanbul Aydin University, Application and Research Center for Advanced Studies (App. & Res. Cent. for Advanced Studies), Istanbul, Turkey 57: Also at Mersin University, Mersin, Turkey 58: Also at Piri Reis University, Istanbul, Turkey 59: Also at Ozyegin University, Istanbul, Turkey 60: Also at Izmir Institute of Technology, Izmir, Turkey 61: Also at Bozok Universitetesi Rekt¨orl¨ug¨u, Yozgat, Turkey 62: Also at Marmara University, Istanbul, Turkey 63: Also at Milli Savunma University, Istanbul, Turkey 64: Also at Kafkas University, Kars, Turkey 65: Also at Istanbul Bilgi University, Istanbul, Turkey 66: Also at Hacettepe University, Ankara, Turkey 67: Also at Adiyaman University, Adiyaman, Turkey 68: Also at Vrije Universiteit Brussel, Brussel, Belgium 69: Also at School of Physics and Astronomy, University of Southampton, Southampton, United Kingdom 70: Also at IPPP Durham University, Durham, United Kingdom 71: Also at Monash University, Faculty of Science, Clayton, Australia 72: Also at Bethel University, St. Paul, Minneapolis, U.S.A., St. Paul, U.S.A. 73: Also at Karamano˘glu Mehmetbey University, Karaman, Turkey 74: Also at Bingol University, Bingol, Turkey 75: Also at Georgian Technical University, Tbilisi, Georgia 76: Also at Sinop University, Sinop, Turkey 77: Also at Mimar Sinan University, Istanbul, Istanbul, Turkey 78: Also at Nanjing Normal University Department of Physics, Nanjing, China 79: Also at Texas A&M University at Qatar, Doha, Qatar 80: Also at Kyungpook National University, Daegu, Korea, Daegu, Korea – 66 –