Suppression of ψ(2S) production in p-Pb collisions at √sNN= 5.02 TeV

JHEP12(2014)073
Published o SISSA by Sp inge
Recei ed:May 30, 2014
Re ised:Oc obe 14, 2014
Accep ed:No embe 17, 2014
Published:Decembe 10, 2014
Supp ession o ψ(2S) p oduc ion in p-Pb collisions a
√sNN = 5.02 TeV
The ALICE collabo a ion
E-mail: [email p o ec ed]
Abs ac : The ALICE Collabo a ion has s udied he inclusi e p oduc ion o he cha -
monium s a e ψ(2S) in p o on-lead (p-Pb) collisions a he nucleon-nucleon cen e o mass
ene gy √sNN = 5.02 TeV a he CERN LHC. The measu emen was pe o med a o wa d
(2.03 < ycms <3.53) and backwa d (−4.46 < ycms <−2.96) cen e o mass apidi ies,
s udying he decays in o muon pai s. In his pape , we p esen he inclusi e p oduc ion
c oss sec ions σψ(2S), bo h in eg a ed and as a unc ion o he ans e se momen um pT,
o he wo ycms domains. The esul s a e compa ed o hose ob ained o he 1S ec o
s a e (J/ψ), by showing he a ios be ween he p oduc ion c oss sec ions, as well as he
double a ios [σψ(2S)/σJ/ψ]pPb/[σψ(2S)/σJ/ψ]pp be ween p-Pb and p o on-p o on collisions.
Finally, he nuclea modifica ion ac o o inclusi e ψ(2S) is e alua ed and compa ed o
he measu emen o he same quan i y o J/ψand o heo e ical models including pa on
shadowing and cohe en ene gy loss mechanisms. The esul s show a significan ly la ge
supp ession o he ψ(2S) compa ed o ha measu ed o J/ψand o models. These obse -
a ions ep esen a clea indica ion o sizeable final s a e effec s on ψ(2S) p oduc ion.
Keywo ds: Cha m physics, Hea y Ions
A Xi eP in : 1405.3796
Open Access, Copy igh CERN,
o he bene i o he ALICE Collabo a ion.
A icle unded by SCOAP3.
doi:10.1007/JHEP12(2014)073
JHEP12(2014)073
The physics o cha monia, bound s a es o he cha m (c) and an i-cha m (c) qua ks, is an
ex emely b oad and in e es ing field o in es iga ion [1]. The desc ip ion o he a ious
s a es and he calcula ion o hei p oduc ion c oss sec ions in had onic collisions in ol e
an in e play o pe u ba i e and non-pe u ba i e aspec s o Quan um Ch omoDynamics
(QCD) [2], which s ill oday ep esen a significan challenge o heo y [3]. Cha monium
s a es can ha e smalle sizes han ligh had ons (down o a ew en hs o a m) and la ge
binding ene gies (>500 MeV) [4]. These p ope ies make cha monia a use ul p obe o he
ho nuclea ma e c ea ed in ul a ela i is ic hea y-ion collisions, which can be seen as
a plasma o deconfined qua ks and gluons (QGP) (see [5] o a ecen o e iew o QGP
s udies). In pa icula , he ccbinding can be sc eened by he high densi y o colou
cha ges p esen in he QGP, leading o a supp ession o he yields o cha monia in high-
ene gy nuclea collisions compa ed o he co esponding p oduc ion a es in elemen a y pp
collisions a he same ene gy [6]. In he so-called “sequen ial supp ession” scena io, he
mel ing o a bound ccs a e occu s when he empe a u e o he ho medium exceeds a
h eshold dissocia ion empe a u e [7,8], which depends on he binding ene gy o he s a e
and can be calcula ed in la ice QCD [9]. A LHC ene gies, whe e he numbe o p oduced
ccpai s is la ge, his supp ession effec can be pa ly coun e balanced by cha monium
“ egene a ion” p ocesses due o he ecombina ion o cha m qua ks ha occu s as he
sys em cools and had ons o m [10–12].
Among he cha monium s a es, he s ongly bound S-wa e J/ψand he weakly bound
adially exci ed ψ(2S) ha e ecei ed mos a en ion in he con ex o QGP s udies. Bo h
decay o lep on pai s wi h a non-negligible b anching a io (5.93% and 0.77%, espec-
i ely, o he µ+µ−channel [13]). The esul s ob ained by he NA50 collabo a ion a he
CERN SPS showed a significan supp ession o he J/ψp oduc ion in Pb-Pb collisions a
√sNN = 17 GeV [14] and a compa a i ely la ge supp ession o he ψ(2S) [15], in quali-
a i e ag eemen wi h sequen ial supp ession models. Howe e , he same expe imen also
de ec ed a significan supp ession o bo h s a es (al hough no as s ong as in Pb-Pb) in
p o on-nucleus (p-A) collisions [16], whe e no QGP o ma ion was expec ed. The same ob-
se a ion was made by o he fixed- a ge expe imen s s udying p-A collisions a Fe milab
(E866 [17]) and HERA (HERA-B [18]). I was indeed ealized ha he cha monium yields
a e also sensi i e o he p esence o cold nuclea ma e (CNM) in he a ge nucleus, and
a ious mechanisms (nuclea pa on shadowing [19], cc b eak-up ia in e ac ion wi h nucle-
ons [20–22], ini ial/final s a e ene gy loss [23]) we e aken in o accoun in o de o desc ibe
expe imen al obse a ions. In pa icula , hese expe imen s obse ed a s onge supp es-
sion o ψ(2S) ela i e o J/ψa cen al apidi y, while a o wa d apidi y no diffe ence
was ound wi hin unce ain ies. This ea u e o he esul s was in e p e ed in e ms o pai
b eak-up: a cen al apidi y he ime spen by he cc s a e in he nuclea medium (c ossing
ime) is ypically la ge han he o ma ion ime o he esonances (∼0.1 m/c[24,25]),
so ha he loosely bound ψ(2S) can be mo e easily dissocia ed han he J/ψ. Con e sely,
in o wa d p oduc ion he c ossing ime is smalle han he o ma ion ime and he influ-
ence o he nucleus on he p e-had onic s a e is he same, independen o he pa icula
esonance being p oduced [26].
–1–
JHEP12(2014)073
Mo e gene ally, he s udy o cha monia in p-A collisions can be used as a ool o
a quan i a i e in es iga ion o he a o emen ioned p ocesses, ele an in he con ex o
s udies o he s ong in e ac ion. The e o e, measu emen s a high ene gies a e impo an
o es ou unde s anding o he a ious mechanisms. In pa icula , he pai b eak-up
c oss sec ions discussed abo e a e expec ed o be s ongly educed due o he inc easingly
sho e ime spen by he ccpai in CNM. On he o he hand, he o he effec s lis ed abo e
(shadowing, ene gy loss) a e no expec ed o depend on he final quan um numbe s o he
cha monium s a es. In such a si ua ion, a simila supp ession o he wo cha monium
s a es should be obse ed in high-ene gy p-A collisions.
In he con ex o compa a i e s udies be ween he esonances, he PHENIX expe imen
a RHIC has ecen ly published esul s on he ψ(2S) supp ession a cen al apidi y o d-Au
collisions a √sNN = 200 GeV [27], by s udying he nuclea modifica ion ac o Rψ(2S)
dAu =
dNψ(2S)
dAu /dy/(Ncoll×dNψ(2S)
pp /dy), which co esponds o he a io o he p oduc ion yields in
d-Au and pp a he same ene gy, no malized by he numbe o nucleon-nucleon collisions in
d-Au. The a io o he nuclea modifica ion ac o s Rψ(2S)
dAu /RJ/ψ
dAu is ound o be smalle han
1, and s ongly dec easing om pe iphe al o cen al d-Au e en s. The obse a ion o a
ψ(2S) supp ession s onge han ha o he J/ψis in con as o he expec a ion o a simila
supp ession as desc ibed abo e. Da a om he LHC can be use ul o shed u he ligh on
his obse a ion, as nuclea c ossing imes [25] may be as low as 10−4 m/c o cha monium
p oduc ion a o wa d apidi y, implying a negligible influence o pai b eak-up p ocesses
and, in mo e gene al e ms, o es ou unde s anding o cha monium p opaga ion in CNM.
In his Le e , we p esen he fi s measu emen o inclusi e ψ(2S) p oduc ion in
√sNN = 5.02 TeV p-Pb collisions a he LHC, ca ied ou by he ALICE Collabo a ion, and
we compa e he esul s wi h hose o J/ψ. The esonances we e measu ed in he dimuon
decay channel using he Muon Spec ome e (MS) [28], which co e s he pseudo apidi y
ange −4< ηlab <−2.5. The o he de ec o s in ol ed in his analysis a e: (i) he wo
inne mos laye s o he Inne T acking Sys em (Silicon Pixel De ec o s, SPD), used o
he de e mina ion o he p ima y e ex o he in e ac ion and co e ing |ηlab|<2.0 (fi s
laye ) and |ηlab|<1.4 (second laye ) [29]; (ii) he wo VZERO scin illa o hodoscopes, used
mainly o igge ing pu poses and co e ing −3.7< ηlab <−1.7 and 2.8< ηlab <5.1 [30];
(iii) he Ze o Deg ee Calo ime e s (ZDC), a 112.5 m om he in e ac ion poin [31], used
o emo e collisions ou side he nominal iming o he LHC bunches. De ails o he ALICE
expe imen al se up a e p o ided elsewhe e [32].
Due o he LHC design, he colliding beams ha e diffe en ene gies pe nucleon (Ep=
4 TeV, EPb = 1.58 ·APb TeV, whe e APb = 208 is he mass numbe o he Pb nucleus). As
a consequence, he cen e o mass o he nucleon-nucleon collision is shi ed by ∆y= 0.465
wi h espec o he labo a o y ame in he di ec ion o he p o on beam. Da a we e aken in
wo configu a ions, by in e ing he sense o he o bi s o he wo beams. In his way, bo h
o wa d (2.03 < ycms <3.53) and backwa d (−4.46 < ycms <−2.96) cen e o mass apidi-
ies we e co e ed, wi h he posi i e apidi y defined by he di ec ion o he p o on beam.
We e e o he wo da a samples as p-Pb and Pb-p espec i ely. The in eg a ed luminosi-
ies o he wo da a samples a e LpPb
in = 5.01±0.19 nb−1and LPbp
in = 5.81±0.20 nb−1[33].
–2–
JHEP12(2014)073
Da a we e collec ed wi h a dimuon igge , defined as he coincidence o he minimum-
bias (MB) condi ion wi h he de ec ion o wo opposi e-sign muon candida es in he igge
sys em o he MS. The MB condi ion is a coincidence be ween signals in he wo VZERO
hodoscopes and has >99% efficiency o non-single diff ac i e e en s [34]. Fo he muon
candida es, a ans e se momen um pT,µ = 0.5 GeV/c igge h eshold is applied. The e -
ec o his h eshold is no sha p, and he single muon igge efficiency eaches i s pla eau
alue (∼96%) o pT,µ ∼1.5 GeV/c. The offline e en selec ion, he muon econs uc ion
and iden ifica ion c i e ia and he kinema ic cu s applied a he single and dimuon le -
els a e iden ical o hose desc ibed in [35]. In addi ion, a cu on he ans e se dis ance
om he p ima y e ex o each o he econs uc ed muon acks, weigh ed wi h i s mo-
men um (pDCA), was pe o med. T acks wi h pDCA >6×σpDCA we e ejec ed. The
quan i y σpDCA is he pDCA esolu ion, which is ob ained om da a, aking in o accoun
he esolu ion on ack momen um and slope [36]. Such a ack cu educes he backg ound
con inuum by a ew pe cen wi hou affec ing he esonances.
The ex ac ion o he esonance signals is ca ied ou by means o a fi o he dimuon
in a ian mass spec um, as illus a ed in figu e 1 o he wo apidi y anges unde s udy.
The J/ψand ψ(2S) line shapes a e desc ibed ei he by C ys al Ball (CB) unc ions [37],
wi h asymme ic ails on bo h sides o he peak, o by pseudo-Gaussian unc ions [38].
The pa ame e s o he esonance shapes a e ob ained by means o a Mon e-Ca lo (MC)
simula ion. Pu e J/ψand ψ(2S) signal samples a e gene a ed, and hen acked and e-
cons uc ed in he expe imen al se up wi h he same p ocedu e applied o eal da a. The
choice o he MC kinema ic dis ibu ions o cha monia is discussed below when in oducing
he accep ance calcula ion. Due o he la ge signal o backg ound a io (S/B) in he J/ψ
mass egion and in o de o accoun o small de ia ions o he mass (∼0.1%) and wid h
(∼10%) be ween MC and da a, he co esponding pa ame e s a e le ee in he fi . Fo
he ψ(2S), due o he less a ou able S/B, he mass and wid hs a e cons ained by hose
o he J/ψusing he ollowing ela ions, which in ol e he co esponding MC quan i ies:
mψ(2S) =mJ/ψ + (mMC
ψ(2S) −mMC
J/ψ) and σψ(2S) =σJ/ψ ·(σMC
ψ(2S)/σMC
J/ψ). Al e na i e alues o
he ψ(2S) mass esolu ion ha e also been es ed, allowing he a io (σMC
ψ(2S)/σMC
J/ψ) o a y
wi hin 10% [36]. Finally, he pa ame e s o he asymme ic ails, which can ha dly be con-
s ained by he da a, a e kep fixed o hei MC alues. Addi ional se s o ails, ob ained
om he MC, bu sampling he ycms and pTphase space, ha e also been es ed. The depen-
dence o he ex ac ed J/ψand ψ(2S) yields on he a ia ion o he ails and on he ψ(2S)
mass esolu ion is included in he sys ema ic unce ain y on he signal ex ac ion. The
backg ound con inuum unde he esonances is pa ame e ized by empi ical shapes, using
a polynomial imes an exponen ial unc ion o a Gaussian ha ing a wid h inc easing wi h
mass. In o de o assess he sys ema ic unce ain y on signal ex ac ion, fi s wi h a ious
combina ions o he signal and backg ound shapes a e pe o med, and he s a /end poin
o he fi ange is also a ied. The aw ψ(2S) yields and hei s a is ical unce ain y is finally
ob ained as he a e age o he esul s o he a ious fi s pe o med, while he sys ema ic
unce ain y is calcula ed as he oo -mean-squa e (RMS) o hei dis ibu ion. This esul s
in Nψ(2S)
pPb = 1069 ±130 ±102 and Nψ(2S)
Pbp = 697 ±111 ±65, whe e he fi s unce ain y is
–3–
JHEP12(2014)073
)
2
c (GeV/
-
µ
+
µ
m
2 2.5 3 3.5 4 4.5 5
2
cCoun s pe 50 MeV/
2
10
3
10
4
10
/nd = 1.33
2
χ
= 5.02 TeV
NN
s ALICE, p-Pb
> 0
T
p < 3.53,
cms
y2.03 <
)
2
c (GeV/
-
µ
+
µ
m
2 2.5 3 3.5 4 4.5 5
2
cCoun s pe 50 MeV/
2
10
3
10
4
10
/nd = 1.39
2
χ
= 5.02 TeV
NN
s ALICE, p-Pb
> 0
T
p < -2.96,
cms
y-4.46 <
Figu e 1. Opposi e-sign dimuon in a ian mass spec a o he p-Pb (le ) and Pb-p ( igh )
da a samples, oge he wi h he esul o a fi . Fo he fi s shown he e, C ys al Ball unc ions
(shown as dashed lines) and a a iable-wid h Gaussian ha e been used o he esonances and
he backg ound, espec i ely. The χ2/nd e e s o he goodness o he signal and backg ound
combined fi in he displayed mass ange.
s a is ical and he second is sys ema ic. The ψ(2S) mass esolu ion ex ac ed om he fi s
is ∼70 MeV/c2. As a c oss-check, an al e na i e app oach o signal ex ac ion, based on
e en coun ing, was also es ed. Mo e p ecisely, a e fi ing he in a ian mass dis ibu-
ion and sub ac ing he backg ound con ibu ion, he numbe o ψ(2S) was ob ained by
in eg a ing he backg ound sub ac ed spec um in he egion 3.5< mµµ <3.8 GeV/c2.
Co ec ions, based on he signal fi ing unc ions, we e applied o he measu ed numbe o
coun s o accoun o he ac ion o ψ(2S) ou side o he in eg a ion egion (∼15%) and o
he numbe o J/ψ alling inside he ψ(2S) mass ange (∼8%). The esul s we e ound o be
s able wi hin 1% wi h espec o 0.1 GeV/c2 a ia ions o he in eg a ion egion. The num-
be o J/ψand ψ(2S) ex ac ed in his way a e also in excellen ag eemen (i.e., well wi hin
he sys ema ic unce ain ies) wi h espec o he Nψ(2S)
pPb and Nψ(2S)
Pbp alues quo ed abo e.
The accep ance imes efficiency alues (A ×ǫ) o he ψ(2S) we e e alua ed using
MC simula ions in a simila way as de ailed in [35] o he J/ψ. The inpu pTdis ibu-
ions we e ob ained om hose used o he J/ψ[35], scaled such ha hpTiψ(2S)
pPb,5.02 TeV =
hpTiJ/ψ
pPb,5.02 TeV ×(hpTiψ(2S)
pp,7 TeV/hpTiJ/ψ
pp,7 TeV), and using he √s= 7 TeV pp alues om
LHCb [39,40] ob ained in he sligh ly la ge ange 2 < ycms <4.5. The inpu ydis i-
bu ions we e ob ained om hose used o he J/ψassuming a scaling o he wid hs wi h
yψ(2S)
max /yJ/ψ
max, whe e yi
max = log(√s/mi) is he maximum apidi y o he esonance ia he
√s alue unde s udy. An unpola ized dis ibu ion o he ψ(2S) was assumed, acco ding
o he esul s ob ained in pp collisions a √s= 7 TeV by he CMS and LHCb expe i-
men s [41,42]. The sys ema ic unce ain y o he ψ(2S) accep ance was calcula ed as
he maximum sp ead o he alues ob ained by assuming as al e na i e inpu dis ibu ions
hose used o he J/ψi sel and amoun s o 1.8% (2.5%) o p-Pb (Pb-p).
The efficiency o he acking and igge de ec o s o he MS was aken in o accoun
in he MC simula ions by means o a map o dead channels ( acking) and by building effi-
ciency ables o he de ec o elemen s ( igge ). The e olu ion o he de ec o pe o mance
–4–

JHEP12(2014)073
h oughou he da a aking was ollowed in he MC, by gene a ing a numbe o e en s which
is p opo ional o he un-by- un numbe o dimuon igge s, in o de o p ope ly weigh
he de ec o condi ions o e he en i e da a aking. The sys ema ic unce ain ies on he effi-
ciencies we e ob ained wi h algo i hms based on eal da a, wi h he same p ocedu e adop ed
in [35], and hey a e iden ical o J/ψand ψ(2S). A small unce ain y ela ed o he effi-
ciency o he ma ching be ween acking and igge ing in o ma ion was also included [35].
The pT-in eg a ed A ×ǫ alues o ψ(2S) p oduc ion, ob ained wi h his p ocedu e,
a e 0.270±0.014 (p-Pb) and 0.184±0.013 (Pb-p), whe e he lowe alue o Pb-p is mainly
due o a smalle de ec o efficiency in he co esponding da a aking pe iod, ela ed o a
wo se de ec o pe o mance. The quo ed unce ain ies a e sys ema ic and a e ob ained as
he quad a ic sum o he unce ain ies on MC inpu , acking, igge ing and ma ching
efficiencies. The s a is ical unce ain ies a e negligible.
The c oss sec ion imes he b anching a io B.R.(ψ(2S) →µµ) o inclusi e ψ(2S)
p oduc ion in p-Pb collisions (and simila ly o Pb-p) is:
B.R.ψ(2S)→µ+µ−·σψ(2S)
pPb =Nco
ψ(2S)→µµ
LpPb
in
(1)
whe e Nco
ψ(2S)→µµ is he numbe o ψ(2S) co ec ed o A ×ǫ, and LpPb
in is he in eg a ed
luminosi y, calcula ed as NMB/σMB
pPb.NMB is he numbe o MB e en s, ob ained as he
numbe o dimuon igge s di ided by he p obabili y o ha ing a igge ed dimuon in a MB
e en . The NMB nume ical alues and unce ain ies a e he same as hose quo ed in [35].
The c oss sec ions o he occu ence o he MB condi ion, σMB
pPb, a e measu ed in a dM
scan [33] o be 2.09 ±0.07 b o he p-Pb configu a ion and 2.12 ±0.07 b o he Pb-p one.
The luminosi y is also independen ly de e mined by means o a second luminosi y signal,
as desc ibed in [33]. The wo measu emen s diffe by a mos 1% h oughou he whole
da a- aking pe iod and such a alue is quad a ically added o he luminosi y unce ain y.
The ψ(2S) c oss sec ion alues a e:
B.R.·σψ(2S)
pPb (2.03 < ycms <3.53) = 0.791 ±0.096(s a .)±0.091(sys .unco .)±0.013(sys .co .)µb
B.R.·σψ(2S)
Pbp (−4.46 < ycms <−2.96) = 0.653 ±0.104(s a .)±0.080(sys .unco .)±0.010(sys .co .)µb
The sys ema ic unce ain ies o he ψ(2S) c oss sec ion measu emen a e ob ained as
he quad a ic sum o he a ious con ibu ions lis ed in able 1. The spli ing be ween
unco ela ed and co ela ed sou ces is also summa ized he e. The co esponding alues
o he J/ψcan be ound in [35].
The s udy o he c oss sec ion a io be ween ψ(2S) and J/ψ, and he compa ison o
his a io be ween diffe en sys ems, offe s a powe ul ool o in es iga e nuclea effec s
on cha monium p oduc ion. In addi ion, se e al sys ema ic unce ain ies cancel, o a e
significan ly educed, when s udying such a ios. In pa icula , in he p esen analysis, he
acking, igge and ma ching efficiencies, as well as he no maliza ion- ela ed quan i ies,
cancel ou . Fo he MC inpu , he ac ion o he unce ain y ela ed o he choice o he
J/ψkinema ical dis ibu ion [35] cancels in he c oss sec ion a ios, and he emaining 1%
–5–
JHEP12(2014)073
B.R.·σψ(2S)
pPb B.R.·σψ(2S)
Pbp
T acking efficiency 4 6
T igge efficiency 2.8 (2 −3.5) 3.2 (2 −3.5)
Signal ex ac ion 9.5 (8 −11.9) 9.3 (8.6 −12.7)
MC inpu 1.8 (1.5 −1.5) 2.5 (1.5 −1.7)
Ma ching efficiency 1 1
Lin (unco .) 3.4 3.1
Lin (co .) 1.6 1.6
Table 1. Sys ema ic unce ain ies (in pe cen ) affec ing he measu emen o inclusi e ψ(2S) c oss
sec ions. The Lin unce ain ies a e spli ed in wo componen s, espec i ely unco ela ed and
co ela ed be ween p-Pb and Pb-p, as de ailed in [33]. All he o he unce ain ies a e unco e-
la ed be ween o wa d and backwa d apidi y. Unce ain ies e e o pT-in eg a ed quan i ies and,
whe e hey depend on pT, he co esponding maximum and minimum alues a e also quo ed. The
efficiency- ela ed unce ain ies e e o muon pai s.
(2%) unce ain y o p-Pb (Pb-p) is assigned o his sou ce. Finally, he unce ain y on
signal ex ac ion is conside ed as unco ela ed be ween J/ψand ψ(2S), and i s alue o
he c oss sec ion a ios amoun s o 10% o bo h p-Pb and Pb-p. The esul ing alues a e:
B.R.ψ(2S)→µ+µ−σψ(2S)
B.R.J/ψ→µ+µ−σJ/ψ (2.03 < ycms <3.53) = 0.0154 ±0.0019(s a .)±0.0015(sys .)
B.R.ψ(2S)→µ+µ−σψ(2S)
B.R.J/ψ→µ+µ−σJ/ψ (−4.46 < ycms <−2.96) = 0.0116 ±0.0018(s a .)±0.0011(sys .)
In figu e 2we compa e hese a ios wi h he co esponding ALICE esul s o pp
collisions [36], ob ained in sligh ly diffe en cen e o mass ene gy and apidi y egions, √s
= 7 TeV, 2.5<|y|<4, as no LHC pp esul s a e a ailable in he same kinema ic condi ions
o p o on-nucleus collisions. The pp a ios a e significan ly highe han hose o p-Pb and
Pb-p, which a e compa ible wi hin unce ain ies.
The double a io [σψ(2S)/σJ/ψ]pPb/[σψ(2S)/σJ/ψ]pp is a use ul quan i y o di ec ly com-
pa e he ela i e supp ession o he wo s a es be ween a ious expe imen s. Fo his
analysis, since he collision ene gy and he y-co e age o he p-Pb (Pb-p) and pp mea-
su emen s a e diffe en , we ha e es ima ed he possible dependence o he σψ(2S)/σJ/ψ s
√sand yin pp collisions. We s a om he empi ical obse a ion ha his a io is e y
simila a collide ene gies o e a a he b oad ange o yand √s. In pa icula , om
he LHCb da a (√s= 7 TeV, 2 < y < 4.5) [39,40] one ge s 2.11% o he inclusi e a io
in eg a ed o e pT, while he co esponding alue om CDF da a (pp a √s= 1.96 TeV,
|y|<0.6) [43] is 2.05%, i.e., only 3% smalle ( he la e quan i y was ob ained by ex-
apola ing he CDF ψ(2S) measu emen o pT= 0 wi h he phenomenological unc ion
(pT) = (pT)/[1+(pT/a)2]b) [44]. The LHCb esul can be ex apola ed o cen al apidi y
a √s= 7 TeV, assuming a Gaussian y-dis ibu ion o bo h esonances, wi h he wid h o
he J/ψdis ibu ion uned di ec ly on da a [39] and ha o ψ(2S) ob ained om he o me
–6–
JHEP12(2014)073
cms
y
-5 -4 -3 -2 -1 0 1 2 3 4 5
ψJ/
σ
-
µ
+
µ→ψJ/
/B.R.
(2S)ψ
σ
-
µ
+
µ→(2S)ψ
B.R.
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
0.04
-
µ
+
µ→(2S)ψ, ψALICE, Inclusi e J/
= 0)
cms
y= 7 TeV (open symbol: e lec ed a ound spp
= 5.02 TeV
NN
sp-Pb
Figu e 2. The c oss sec ion a ios B.R.ψ(2S)→µ+µ−σψ(2S)/B.R.J/ψ→µ+µ−σJ/ψ o p-Pb and Pb-p
collisions, compa ed wi h he co esponding pp esul s a √s= 7 TeV [36]. The ho izon al ba s
co espond o he wid h o he apidi y egions unde s udy. The e ical e o ba s ep esen
s a is ical unce ain ies, he boxes co espond o sys ema ic unce ain ies.
assuming a scaling o he wid hs wi h yψ(2S)
max /yJ/ψ
max. The effec o his escaling is small, lead-
ing o a 3% inc ease o he a io. The cen al- apidi y a io σψ(2S)/σJ/ψ a √s= 5.02 TeV
is hen ob ained by means o an in e pola ion be ween he CDF and LHCb- escaled alues,
assuming a linea dependence o he a io s √s. Finally, one can ex apola e he a io o
he p-Pb and Pb-p apidi y anges by using o he J/ψ he Gaussian shape ob ained wi h
he in e pola ion p ocedu e desc ibed in [45] and o he ψ(2S) he co esponding shape
scaled wi h yψ(2S)
max /yJ/ψ
max. The diffe ence be ween he measu ed alue o σψ(2S)/σJ/ψ o √s
= 7 TeV, 2 < ycms <4.5 and he esul s o he in e pola ion p ocedu e o √s= 5.02 TeV,
2.03 < ycms <3.53 (−4.46 < ycms <−2.96) is -1.6% (-3.7%). When calcula ing he double
a io [σψ(2S)/σJ/ψ]pPb/[σψ(2S)/σJ/ψ]pp, we choose o use o pp he measu ed alue a √s
= 7 TeV, 2.5< ycms <4 [36] ( a he han he in e pola ed one a √s= 5.02 TeV) and o
include a 8% sys ema ic unce ain y on his quan i y, i.e., abou wice he maximum di -
e ence be ween he measu ed alues o he a io in pp and he esul s o he in e pola ion
p ocedu e. A simila unce ain y would be ob ained using as an inpu o he calcula ion,
ins ead o he LHCb da a, he mo e ecen pp esul om ALICE on σψ(2S)/σJ/ψ [36].
The alues o he double a io a e shown in figu e 3, whe e hey a e also compa ed
wi h he co esponding esul s ob ained by he PHENIX expe imen a √sNN = 200 GeV,
o |y|<0.35 [27]. When o ming he double a io, he sys ema ic unce ain ies on he pp
a io, including he 8% con ibu ion desc ibed in he p e ious pa ag aph, a e conside ed as
co ela ed be ween o wa d and backwa d apidi y, while he o he sys ema ic unce ain ies
a e ea ed as unco ela ed. The domina ing con ibu ions o he sys ema ic unce ain y
come om he signal ex ac ion and om he in e pola ion p ocedu e used o he pp c oss
–7–
JHEP12(2014)073
cms
y
-5 -4 -3 -2 -1 0 1 2 3 4 5
pp
]
ψJ/
σ /
(2S)ψ
σ / [
pPb (dAu)
]
ψJ/
σ /
(2S)ψ
σ[
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
= 5.02 TeV
NN
sALICE, p-Pb,
= 0.2 TeV
NN
sPHENIX, d-Au,
Figu e 3. Double a ios [σψ(2S)/σJ/ψ]pPb/[σψ(2S)/σJ/ψ]pp o p-Pb and Pb-p collisions, compa ed
o he co esponding PHENIX esul a √sNN = 200 GeV [27]. The ho izon al ba s co espond o
he wid h o he apidi y egions unde s udy. Fo ALICE, he e ical e o ba s co espond o
s a is ical unce ain ies, he boxes o unco ela ed sys ema ic unce ain ies, and he shaded a eas
o co ela ed unce ain ies. Fo PHENIX, he a ious sou ces o sys ema ic unce ain ies we e
combined in quad a u e.
sec ion. The ALICE esul s show ha , compa ed o pp, he ψ(2S) is mo e supp essed han
he J/ψ o a 2.3σ(4.1σ) le el in p-Pb (Pb-p). The PHENIX esul shows a simila ea u e,
a a 1.3σle el.
The supp ession o cha monium s a es wi h espec o he co esponding pp yield
can be quan ified using he nuclea modifica ion ac o . Fo ψ(2S), Rψ(2S)
pPb is ob ained by
combining RJ/ψ
pPb [35] wi h he double a io e alua ed abo e:
Rψ(2S)
pPb =RJ/ψ
pPb ·σψ(2S)
pPb
σJ/ψ
pPb ·σJ/ψ
pp
σψ(2S)
pp
(2)
In figu e 4,Rψ(2S)
pPb is shown and compa ed wi h RJ/ψ
pPb. Fo he double a ios, he
diffe ence in he √sand ydomains be ween p-Pb and pp is aken in o accoun by he
inclusion o he 8% sys ema ic unce ain y desc ibed abo e. The o he quo ed unce ain ies
combine hose om RJ/ψ
pPb [35] wi h hose o he double a io, a oiding a double coun ing
o he J/ψ ela ed unce ain ies. Figu e 4indica es ha he ψ(2S) supp ession is much
s onge han o he J/ψand eaches a ac o ∼2 wi h espec o pp. The esul s a e
compa ed wi h heo e ical calcula ions including ei he nuclea shadowing only [46,47]
o cohe en ene gy loss, wi h o wi hou a shadowing con ibu ion [48]. Fo he o me
mechanism, he alues co espond o calcula ions pe o med o he J/ψ. Howe e , due o
he ela i ely simila kinema ic dis ibu ions o gluons ha p oduce he ccpai which will
hen had onize o a J/ψo a ψ(2S), he shadowing effec s a e expec ed o be he same,
–8–
JHEP12(2014)073
[12] A. And onic, P. B aun-Munzinge , K. Redlich and J. S achel, S a is ical had oniza ion o
hea y qua ks in ul a- ela i is ic nucleus-nucleus collisions,Nucl. Phys. A 789 (2007) 334
[nucl- h/0611023] [INSPIRE].
[13] Pa icle Da a G oup collabo a ion, J. Be inge e al., Re iew o pa icle physics (RPP),
Phys. Re . D 86 (2012) 010001 [INSPIRE].
[14] NA50 collabo a ion, B. Alessand o e al., A new measu emen o J/ψ supp ession in Pb-Pb
collisions a 158 GeV pe nucleon,Eu . Phys. J. C 39 (2005) 335 [hep-ex/0412036]
[INSPIRE].
[15] NA50 collabo a ion, B. Alessand o e al., ψ′p oduc ion in Pb-Pb collisions a
158 GeV/nucleon,Eu . Phys. J. C 49 (2007) 559 [nucl-ex/0612013] [INSPIRE].
[16] NA50 collabo a ion, B. Alessand o e al., J/ψ and ψ′p oduc ion and hei no mal nuclea
abso p ion in p o on-nucleus collisions a 400 GeV,Eu . Phys. J. C 48 (2006) 329
[nucl-ex/0612012] [INSPIRE].
[17] NuSea collabo a ion, M.J. Lei ch e al., Measu emen o J/ψ and ψ′supp ession in p-A
collisions a 800 GeV/c,Phys. Re . Le . 84 (2000) 3256 [nucl-ex/9909007] [INSPIRE].
[18] HERA-B collabo a ion, I. Ab e al., A measu emen o he ψ′ o J/ψ p oduc ion a io in
920 GeV p o on-nucleus in e ac ions,Eu . Phys. J. C 49 (2007) 545 [hep-ex/0607046]
[INSPIRE].
[19] K.J. Eskola, H. Paukkunen and C.A. Salgado, EP S09: a new gene a ion o NLO and LO
nuclea pa on dis ibu ion unc ions,JHEP 04 (2009) 065 [a Xi :0902.4154] [INSPIRE].
[20] R. Vog , A e he J/ψ and χcA dependencies he same?,Nucl. Phys. A 700 (2002) 539
[hep-ph/0107045] [INSPIRE].
[21] B.Z. Kopelio ich and B.G. Zakha o , Quan um e ec s and colo anspa ency in
cha monium pho op oduc ion on nuclei,Phys. Re . D 44 (1991) 3466 [INSPIRE].
[22] D.C. McGlinchey, A.D. F awley and R. Vog , Impac pa ame e dependence o he nuclea
modi ica ion o J/ψ p oduc ion in d+Au collisions a √sNN = 200 GeV,
Phys. Re . C 87 (2013) 054910 [a Xi :1208.2667] [INSPIRE].
[23] F. A leo and S. Peigne, J/ψ supp ession in p-A collisions om pa on ene gy loss in cold
QCD ma e ,Phys. Re . Le . 109 (2012) 122301 [a Xi :1204.4609] [INSPIRE].
[24] F. A leo, P.B. Gossiaux, T. Gousse and J. Aichelin, Cha monium supp ession in p-A
collisions,Phys. Re . C 61 (2000) 054906 [hep-ph/9907286] [INSPIRE].
[25] D.C. McGlinchey, A.D. F awley and R. Vog , Impac pa ame e dependence o he nuclea
modi ica ion o J/ψ p oduc ion in d+Au collisions a √sNN = 200 GeV,
Phys. Re . C 87 (2013) 054910 [a Xi :1208.2667] [INSPIRE].
[26] R. Vog , The xFdependence o ψand D ell-Yan p oduc ion,Phys. Re . C 61 (2000) 035203
[hep-ph/9907317] [INSPIRE].
[27] PHENIX collabo a ion, A. Ada e e al., Nuclea modi ica ion o ψ′,χcand J/ψ p oduc ion
in d+Au collisions a √sNN = 200 GeV,Phys. Re . Le . 111 (2013) 202301
[a Xi :1305.5516] [INSPIRE].
[28] ALICE collabo a ion, Rapidi y and ans e se momen um dependence o inclusi e J/ψ
p oduc ion in pp collisions a √s= 7 TeV,Phys. Le . B 704 (2011) 442 [E a um ibid. B
718 (2012) 692] [a Xi :1105.0380] [INSPIRE].
– 15 –

JHEP12(2014)073
[29] ALICE collabo a ion, Alignmen o he ALICE Inne T acking Sys em wi h cosmic- ay
acks,2010 JINST 5P03003 [a Xi :1001.0502] [INSPIRE].
[30] ALICE collabo a ion, Pe o mance o he ALICE VZERO sys em,2013 JINST 8P10016
[a Xi :1306.3130] [INSPIRE].
[31] ALICE collabo a ion, Measu emen o he c oss sec ion o elec omagne ic dissocia ion wi h
neu on emission in Pb-Pb collisions a √sNN = 2.76 TeV,
Phys. Re . Le . 109 (2012) 252302 [a Xi :1203.2436] [INSPIRE].
[32] ALICE collabo a ion, The ALICE expe imen a he CERN LHC,2008 JINST 3S08002
[INSPIRE].
[33] ALICE collabo a ion, Measu emen o isible c oss sec ions in p o on-lead collisions a
√sNN = 5.02 TeV in an de Mee scans wi h he ALICE de ec o ,2014 JINST 9P11003
[a Xi :1405.1849] [INSPIRE].
[34] ALICE collabo a ion, Pseudo apidi y densi y o cha ged pa icles p-Pb collisions a
√sNN = 5.02 TeV,Phys. Re . Le . 110 (2013) 032301 [a Xi :1210.3615] [INSPIRE].
[35] ALICE collabo a ion, J/ψ p oduc ion and nuclea e ec s in p-Pb collisions a
√sNN = 5.02 TeV,JHEP 02 (2014) 073 [a Xi :1308.6726] [INSPIRE].
[36] ALICE collabo a ion, Measu emen o qua konium p oduc ion a o wa d apidi y in pp
collisions a √s= 7 TeV,Eu . Phys. J. C 74 (2014) 2974 [a Xi :1403.3648] [INSPIRE].
[37] J. Gaise , Line shape and esolu ion, in Cha monium spec oscdpy om adia i e decays o
he J/ψ and ψ′,SLAC-255, SLAC, S an o d U.S.A. (1982), pg. 177 [INSPIRE].
[38] R. Shahoyan, J/ψ and ψ′p oduc ion in 450 GeV pA in e ac ions and i s dependence on he
apidi y and XF, Ph.D. hesis, h p://www.ce n.ch/NA50/ heses/ uben.ps.gz, Ins i u o
Supe io T´ecnico, Lisbon Po ugal (2001).
[39] LHCb collabo a ion, Measu emen o J/ψ pola iza ion in pp collisions a √s= 7 TeV,
Eu . Phys. J. C 73 (2013) 2631 [a Xi :1307.6379] [INSPIRE].
[40] LHCb collabo a ion, Measu emen o ψ(2S)meson p oduc ion in pp collisions a
√s= 7 TeV,Eu . Phys. J. C 72 (2012) 2100 [a Xi :1204.1258] [INSPIRE].
[41] CMS collabo a ion, Measu emen o he p omp J/ψ and ψ(2S)pola iza ions in pp collisions
a √s= 7 TeV,Phys. Le . B 727 (2013) 381 [a Xi :1307.6070] [INSPIRE].
[42] LHCb collabo a ion, Measu emen o ψ(2S)pola isa ion in pp collisions a √s= 7 TeV,
Eu . Phys. J. C 74 (2014) 2872 [a Xi :1403.1339] [INSPIRE].
[43] CDF collabo a ion, T. Aal onen e al., P oduc ion o ψ(2S)mesons in p¯pcollisions a
1.96 TeV,Phys. Re . D 80 (2009) 031103 [a Xi :0905.1982] [INSPIRE].
[44] PHENIX collabo a ion, A. Ada e e al., J/ψ p oduc ion e sus ans e se momen um and
apidi y in p+pcollisions a √s= 200 GeV,Phys. Re . Le . 98 (2007) 232002
[hep-ex/0611020] [INSPIRE].
[45] ALICE and LHCb collabo a ions, Re e ence pp c oss-sec ions o J/ψ s udies in p o on-lead
collisions a √sNN = 5.02 TeV and compa isons be ween ALICE and LHCb esul s,
ALICE-PUBLIC-2013-002, CERN, Gene a Swi ze land (2013) [LHCb-CONF-2013-013].
[46] J.L. Albace e e al., P edic ions o p+Pb collisions a √sNN = 5 TeV,
In . J. Mod. Phys. E 22 (2013) 1330007 [a Xi :1301.3395] [INSPIRE].
[47] R. Vog , p i a e communica ion.
– 16 –
JHEP12(2014)073
[48] F. A leo and S. Peigne, Hea y-qua konium supp ession in p-A collisions om pa on ene gy
loss in cold QCD ma e ,JHEP 03 (2013) 122 [a Xi :1212.0434] [INSPIRE].
[49] E.G. Fe ei o, F. Fleu e , J.P. Lansbe g and A. Rako ozafind abe, J/ψ and ψ′p oduc ion in
p o on(deu e on)-nucleus collisions: lessons om RHIC o he p o on-lead LHC un,
J. Phys. Con . Se . 422 (2013) 012018 [a Xi :1211.4749] [INSPIRE].
[50] E.G. Fe ei o, p i a e communica ion.
[51] F. A leo, p i a e communica ion.
[52] M.L. Mille , K. Reyge s, S.J. Sande s and P. S einbe g, Glaube modeling in high ene gy
nuclea collisions,Ann. Re . Nucl. Pa . Sci. 57 (2007) 205 [nucl-ex/0701025] [INSPIRE].
[53] ALICE collabo a ion, B. Abele e al., Rapidi y and ans e se momen um dependence o
he inclusi e J/ψ nuclea modi ica ion ac o in p-Pb collisions a √sNN = 5.02 TeV, in
p epa a ion.
– 17 –
JHEP12(2014)073
The ALICE collabo a ion
B. Abele 69, J. Adam37, D. Adamo ´a77, M.M. Agga wal81, M. Agnello105,88, A. Agos inelli26,
N. Ag awal44, Z. Ahammed124, N. Ahmad18, I. Ahmed15, S.U. Ahn62, S.A. Ahn62, I. Aimo105,88,
S. Aiola129, M. Ajaz15, A. Akindino 53, S.N. Alam124, D. Aleksand o 94, B. Alessand o105,
D. Alexand e96, A. Alici12,99, A. Alkin3, J. Alme35, T. Al 39, S. Al inpina 17, I. Al sybee 123,
C. Al es Ga cia P ado113, C. And ei72, A. And onic91, V. Anguelo 87, J. Anielski49, T. An iˇci´c92,
F. An ino i102, P. An onioli99, L. Aphece che107, H. Appelsh¨ause 48, S. A celli26, N. A mes o16,
R. A naldi105, T. A onsson129, I.C. A sene91, M. A slandok48, A. Augus inus34, R. A e beck91,
T.C. Awes78, M.D. Azmi83, M. Bach39, A. Badal`a101, Y.W. Baek40,64, S. Bagnasco105,
R. Bailhache48, R. Bala84, A. Baldisse i14, F. Bal asa Dos San os Ped osa34, R.C. Ba al56,
R. Ba be a27, F. Ba ile31, G.G. Ba na ¨oldi128, L.S. Ba nby96, V. Ba e 64, J. Ba ke110,
M. Basile26, N. Bas id64, S. Basu124, B. Ba hen49, G. Ba igne107, A. Ba is a Camejo64,
B. Ba yunya61, P.C. Ba zing21, C. Baumann48, I.G. Bea den74, H. Beck48, C. Bedda88,
N.K. Behe a44, I. Beliko 50, F. Bellini26, R. Bellwied115, E. Belmon -Mo eno59, R. Belmon III127,
V. Belyae 70, G. Bencedi128, S. Beole25, I. Be ceanu72, A. Be cuci72, Y. Be dniko II,79,
D. Be enyi128, M.E. Be ge 86, R.A. Be ens52, D. Be zano25, L. Be e 34, A. Bhasin84, I.R. Bha 84,
A.K. Bha i81, B. Bha acha jee41, J. Bhom120, L. Bianchi25, N. Bianchi66, C. Bianchin52,
J. Bielˇc´ık37, J. Bielˇc´ıko ´a77, A. Bilandzic74, S. Bjelog lic52, F. Blanco10, D. Blau94, C. Blume48,
F. Bock68,87, A. Bogdano 70, H. Bøggild74, M. Bogolyubsky106, F.V. B¨ohme 86, L. Boldizs´a 128,
M. Bomba a38, J. Book48, H. Bo el14, A. Bo isso 127,90, F. Boss´u60, M. Bo je75, E. Bo a25,
S. B¨o ge 47, P. B aun-Munzinge 91, M. B egan 113, T. B ei ne 47, T.A. B oke 48,
T.A. B owning89, M. B oz37, E. B una105, G.E. B uno31, D. Budniko 93, H. Buesching48,
S. Bu alino105, P. Buncic34, O. Busch87, Z. Bu helezi60, D. Caffa i28, X. Cai7, H. Caines129,
L. Cale o Diaz66, A. Cali a52, E. Cal o Villa 97, P. Came ini24, F. Ca ena34, W. Ca ena34,
J. Cas illo Cas ellanos14, E.A.R. Casula23, V. Ca anescu72, C. Ca icchioli34,
C. Ceballos Sanchez9, J. Cepila37, P. Ce ello105, B. Chang116, S. Chapeland34, J.L. Cha e 14,
S. Cha opadhyay124, S. Cha opadhyay95, V. Chelnoko 3, M. Che ney80, C. Cheshko 122,
B. Cheynis122, V. Chiban e Ba oso34, D.D. Chinella o115, P. Chochula34, M. Chojnacki74,
S. Choudhu y124, P. Ch is akoglou75, C.H. Ch is ensen74, P. Ch is iansen32, T. Chujo120,
S.U. Chung90, C. Cicalo100, L. Ci a elli26,12, F. Cindolo99, J. Cleymans83, F. Colama ia31,
D. Colella31, A. Collu23, M. Colocci26, G. Conesa Balbas e65, Z. Conesa del Valle46,
M.E. Conno s129, J.G. Con e as11, T.M. Co mie 127, Y. Co ales Mo ales25, P. Co ese30,
I. Co ´es Maldonado2, M.R. Cosen ino113, F. Cos a34, P. C oche 64, R. C uz Albino11,
E. Cuau le58, L. Cunquei o66, A. Dainese102, R. Dang7, A. Danu57, D. Das95, I. Das46, K. Das95,
S. Das4, A. Dash114, S. Dash44, S. De124, H. Delag angeI,107, A. Deloff71, E. D´enes128,
G. D’E asmo31, A. De Ca o29,12, G. de Ca aldo98, J. de Cu eland39, A. De Falco23,
D. De G u ola29,12, N. De Ma co105, S. De Pasquale29, R. de Rooij52, M.A. Diaz Co che o10,
T. Die el49, P. Dillensege 48, R. Di i`a34, D. Di Ba i31, S. Di Libe o103, A. Di Mau o34,
P. Di Nezza66, Ø. Dju sland17, A. Dob in52, T. Dob owolski71, D. Domenicis Gimenez113,
B. D¨onigus48, O. Do dic21, S. Dø heim86, A.K. Dubey124, A. Dubla52, L. Duc oux122,
P. Dupieux64, A.K. Du a Majumda 95, T. E. Hilden42, R.J. Ehle s129, D. Elia98, H. Engel47,
B. E azmus34,107, H.A. E dal35, D. Eschweile 39, B. Espagnon46, M. Esposi o34, M. Es ienne107,
S. Esumi120, D. E ans96, S. E dokimo 106, D. Fab is102, J. Fai e65, D. Falchie i26, A. Fan oni66,
M. Fasel87, D. Fehlke 17, L. Feldkamp49, D. Felea57, A. Feliciello105, G. Feofilo 123, J. Fe encei77,
A. Fe n´andez T´ellez2, E.G. Fe ei o16, A. Fe e i25, A. Fes an i28, J. Figiel110,
M.A.S. Figue edo117, S. Filchagin93, D. Finogee 51, F.M. Fionda31, E.M. Fio e31, E. Flo a os82,
M. Flo is34, S. Foe sch60, P. Foka91, S. Fokin94, E. F agiacomo104, A. F ancescon34,28,
– 18 –
JHEP12(2014)073
U. F anken eld91, U. Fuchs34, C. Fu ge 65, M. Fusco Gi a d29, J.J. Gaa dhøje74, M. Gaglia di25,
A.M. Gago97, M. Gallio25, D.R. Gangadha an19, P. Gano i78, C. Ga aba os91, E. Ga cia-Solis13,
C. Ga giulo34, I. Ga ish ili69, J. Ge ha d39, M. Ge main107, A. Ghea a34, M. Ghea a34,57,
B. Ghidini31, P. Ghosh124, S.K. Ghosh4, P. Giano i66, P. Giubellino34, E. Gladysz-Dziadus110,
P. Gl¨assel87, A. Gomez Rami ez47, P. Gonz´alez-Zamo a10, S. Go buno 39, L. G¨o lich110,
S. Go o ac109, L.K. G aczykowski126, A. G elli52, A. G igo as34, C. G igo as34, V. G igo ie 70,
A. G igo yan1, S. G igo yan61, B. G inyo 3, N. G ion104, J.F. G osse-Oe inghaus34,
J.-Y. G ossio d122, R. G osso34, F. Gube 51, R. Gue nane65, B. Gue zoni26, M. Guilbaud122,
K. Gulb andsen74, H. Gulkanyan1, M. Gumbo83, T. Gunji119, A. Gup a84, R. Gup a84,
K. H. Khan15, R. Haake49, Ø. Haaland17, C. Hadjidakis46, M. Haiduc57, H. Hamagaki119,
G. Hama 128, L.D. Han a y96, A. Hansen74, J.W. Ha is129, H. Ha mann39, A. Ha on13,
D. Ha zi o iadou99, S. Hayashi119, S.T. Heckel48, M. Heide49, H. Hels up35, A. He ghelegiu72,
G. He e a Co al11, B.A. Hess33, K.F. He land35, B. Hippoly e50, J. Hladky55, P. H is o 34,
M. Huang17, T.J. Humanic19, N. Hussain41, D. Hu e 39, D.S. Hwang20, R. Ilkae 93, I. Ilki 71,
M. Inaba120, G.M. Innocen i25, C. Ioni a34, M. Ippoli o 94, M. I an18, M. I ano 91, V. I ano 79,
A. Jacho lkowski27, P.M. Jacobs68, C. Jahnke113, H.J. Jang62, M.A. Janik126,
P.H.S.Y. Jaya a hna115, C. Jena28, S. Jena115, R.T. Jimenez Bus aman e58, P.G. Jones96,
H. Jung40, A. Jusko96, V. Kadyshe skiy61, S. Kalche 39, P. Kalinak54, A. Kalwei 34, J. Kamin48,
J.H. Kang130, V. Kaplin70, S. Ka 124, A. Ka asu Uysal63, O. Ka a iche 51, T. Ka a iche a51,
E. Ka peche 51, U. Kebschull47, R. Keidel131, D.L.D. Keijdene 52, M. Keil SVN34,
M.M. KhanIII,18, P. Khan95, S.A. Khan124, A. Khanzadee 79, Y. Kha lo 106, B. Kileng35,
B. Kim130, D.W. Kim62,40, D.J. Kim116, J.S. Kim40, M. Kim40, M. Kim130, S. Kim20, T. Kim130,
S. Ki sch39, I. Kisel39, S. Kisele 53, A. Kisiel126, G. Kiss128, J.L. Klay6, J. Klein87,
C. Klein-B¨osing49, A. Kluge34, M.L. Knichel91, A.G. Knospe111, C. Kobdaj34,108, M. Ko a ago34,
M.K. K¨ohle 91, T. Kollegge 39, A. Koloj a i123, V. Kond a ie 123, N. Kond a ye a70,
A. Kone skikh51, V. Ko alenko123, M. Kowalski110, S. Kox65, G. Koyi ha a Mee hale eedu44,
J. K al116, I. K ´alik54, F. K ame 48, A. K a ˇc´ako ´a38, M. K elina37, M. K e z39, M. K i da96,54,
F. K izek77, E. K yshen34, M. K zewicki91, V. Kuˇce a77, Y. Kuche iae I,94, T. Kuga hasan34,
C. Kuhn50, P.G. Kuije 75, I. Kulako 48, J. Kuma 44, P. Ku ash ili71, A. Ku epin51,
A.B. Ku epin51, A. Ku yakin93, S. Kushpil77, M.J. Kweon87, Y. Kwon130, P. Lad on de
Gue a a58, C. Lagana Fe nandes113, I. Lakomo 46, R. Langoy125, C. La a47, A. La deux107,
A. La uca25, S.L. La Poin e52, P. La Rocca27, R. Lea24, L. Lea dini87, G.R. Lee96, I. Leg and34,
J. Lehne 48, R.C. Lemmon76, V. Len i98, E. Leog ande52, M. Leoncino25, I. Le´on Monz´on112,
P. L´e ai128, S. Li64,7, J. Lien125, R. Lie a a96, S. Lindal21, V. Lindens u h39, C. Lippmann91,
M.A. Lisa19, H.M. Ljungg en32, D.F. Loda o52, P.I. Loenne17, V.R. Loggins127, V. Logino 70,
D. Lohne 87, C. Loizides68, X. Lopez64, E. L´opez To es9, X.-G. Lu87, P. Lue ig48,
M. Luna don28, G. Lupa ello52, R. Ma129, A. Mae skaya51, M. Mage 34, D.P. Mahapa a56,
S.M. Mahmood21, A. Mai e87, R.D. Majka129, M. Malae 79, I. Maldonado Ce an es58,
L. MalininaIV,61, D. Mal’Ke ich53, P. Malzache 91, A. Mamono 93, L. Manceau105, V. Manko94,
F. Manso64, V. Manza i98, M. Ma chisone64,25, J. Ma eˇs55, G.V. Ma gaglio i24, A. Ma go i99,
A. Ma ´ın91, C. Ma ke 111, M. Ma qua d48, I. Ma ash ili118, N.A. Ma in91, P. Ma inengo34,
M.I. Ma ´ınez2, G. Ma ´ınez Ga c´ıa107, J. Ma in Blanco107, Y. Ma yno 3, A. Mas107,
S. Masciocchi91, M. Mase a25, A. Masoni100, L. Massac ie 107, A. Mas ose io31, A. Ma yja110,
C. Maye 110, J. Maze 118, M.A. Mazzoni103, F. Meddi22, A. Menchaca-Rocha59,
J. Me cado P´e ez87, M. Me es36, Y. Miake120, K. Mikhaylo 61,53, L. Milano34, J. Milose icV,21,
A. Mischke52, A.N. Mish a45, D. Mi´skowiec91, J. Mi a124, C.M. Mi u57, J. Mlyna z127,
N. Mohammadi52, B. Mohan y73,124, L. Molna 50, L. Mon a˜no Ze ina11, E. Mon es10,
M. Mo ando28, D.A. Mo ei a De Godoy113, S. Mo e o28, A. Mo sch34, V. Mucci o a66,
– 19 –
JHEP12(2014)073
E. Mudnic109, D. M¨uhlheim49, S. Muhu i124, M. Mukhe jee124, H. M¨ulle 34, M.G. Munhoz113,
S. Mu ay83, L. Musa34, J. Musinsky54, B.K. Nandi44, R. Nania99, E. Nappi98, C. Na ass118,
K. Nayak73, T.K. Nayak124, S. Naza enko93, A. Nedosekin53, M. Nicassio91, M. Niculescu34,57,
B.S. Nielsen74, S. Nikolae 94, S. Nikulin94, V. Nikulin79, B.S. Nilsen80, F. No e ini12,99,
P. Nomokono 61, G. Noo en52, J. No man117, A. Nyanin94, J. Nys and17, H. Oeschle 87,
S. Oh129, S.K. OhVI,40, A. Oka an63, L. Olah128, J. Oleniacz126, A.C. Oli ei a Da Sil a113,
J. Onde waa e 91, C. Oppedisano105, A. O iz Velasquez32, A. Oska sson32, J. O winowski91,
K. Oyama87, P. Sahoo45, Y. Pachmaye 87, M. Pach 37, P. Pagano29, G. Pai´c58, F. Painke39,
C. Paja es16, S.K. Pal124, A. Palme i101, D. Pan 44, V. Papikyan1, G.S. Pappala do101,
P. Pa eek45, W.J. Pa k91, S. Pa ma 81, A. Pass eld49, D.I. Pa alakha106, V. Pa icchio98,
B. Paul95, T. Pawlak126, T. Pei zmann52, H. Pe ei a Da Cos a14, E. Pe ei a De Oli ei a Filho113,
D. Pe esunko94, C.E. P´e ez La a75, A. Pesci99, V. Pesko 48, Y. Pes o 5, V. Pe ´aˇcek37,
M. Pe an37, M. Pe is72, M. Pe o ici72, C. Pe a27, S. Piano104, M. Pikna36, P. Pillo 107,
O. Pinazza99,34, L. Pinsky115, D.B. Piya a hna115, M. P losko´n68, M. Planinic121,92, J. Plu a126,
S. Pochybo a128, P.L.M. Podes a-Le ma112, M.G. Poghosyan34, E.H.O. Pohjoisaho42,
B. Polich chouk106, N. Poljak92, A. Pop72, S. Po eboeu -Houssais64, J. Po e 68, B. Po ukuchi84,
S.K. P asad127, R. P eghenella99,12, F. P ino105, C.A. P uneau127, I. Pshenichno 51, G. Puddu23,
P. Pujaha i127, V. Punin93, J. Pu schke127, H. Q igs ad21, A. Rache ski104, S. Raha4, J. Rak116,
A. Rako ozafind abe14, L. Ramello30, R. Raniwala85, S. Raniwala85, S.S. R¨as¨anen42,
B.T. Rascanu48, D. Ra hee81, A.W. Rau 15, V. Razazi23, K.F. Read118, J.S. Real65,
K. RedlichVII,71, R.J. Reed129, A. Rehman17, P. Reichel 48, M. Reiche 52, F. Reid 87,34,
R. Ren o d 48, A.R. Reolon66, A. Reshe in51, F. Re ig39, J.-P. Re ol34, K. Reyge s87,
V. Riabo 79, R.A. Ricci67, T. Riche 32, M. Rich e 21, P. Riedle 34, W. Riegle 34, F. Riggi27,
A. Ri e i105, E. Rocco52, M. Rod ´ıguez Cahuan zi2, A. Rod iguez Manso75, K. Røed21,
E. Rogochaya61, S. Rohni84, D. Roh 39, D. R¨oh ich17, R. Romi a76, F. Ronche i66,
L. Ronfle e107, P. Rosne 64, A. Rossi34, F. Roukou akis82, A. Roy45, C. Roy50, P. Roy95,
A.J. Rubio Mon e o10, R. Rui24, R. Russo25, E. Ryabinkin94, Y. Ryabo 79, A. Rybicki110,
S. Sado sky106, K. ˇ
Sa aˇ ´ık34, B. Sahlmulle 48, R. Sahoo45, P.K. Sahu56, J. Saini124, S. Sakai66,
C.A. Salgado16, J. Salzwedel19, S. Sambyal84, V. Samsono 79, X. Sanchez Cas o50,
F.J. S´anchez Rod ´ıguez112, L. ˇ
S´ando 54, A. Sando al59, M. Sano120, G. San aga i27, D. Sa ka 124,
E. Scappa one99, F. Sca lassa a28, R.P. Scha enbe g89, C. Schiaua72, R. Schicke 87, C. Schmid 91,
H.R. Schmid 33, S. Schuchmann48, J. Schuk a 34, M. Schulc37, T. Schus e 129, Y. Schu z107,34,
K. Schwa z91, K. Schweda91, G. Scioli26, E. Scompa in105, R. Sco 118, G. Sega o28, J.E. Sege 80,
Y. Sekiguchi119, I. Selyuzhenko 91, J. Seo90, E. Se adilla10,59, A. Se cenco57, A. Shabe ai107,
G. Shab a o a61, R. Shahoyan34, A. Shanga ae 106, N. Sha ma118, S. Sha ma84, K. Shigaki43,
K. Sh eje 25, Y. Sibi iak94, S. Siddhan a100, T. Siemia czuk71, D. Sil e my 78, C. Sil es e65,
G. Sima o ic121, R. Singa aju124, R. Singh84, S. Singha124,73, V. Singhal124, B.C. Sinha124,
T. Sinha95, B. Si a 36, M. Si a30, T.B. Skaali21, K. Skje dal17, M. Slupecki116, N. Smi no 129,
R.J.M. Snellings52, C. Søgaa d32, R. Sol z69, J. Song90, M. Song130, F. So amel28, S. So ensen118,
M. Spacek37, E. Spi i i66, I. Spu owska110, M. Spy opoulou-S assinaki82, B.K. S i as a a89,
J. S achel87, I. S an57, G. S e anek71, M. S einp eis19, E. S enlund32, G. S eyn60, J.H. S ille 87,
D. S occo107, M. S olpo skiy106, P. S men36, A.A.P. Suaide113, T. Sugi a e43, C. Sui e46,
M. Suleymano 15, R. Sul ano 53, M. ˇ
Sumbe a77, T. Susa92, T.J.M. Symons68, A. Szabo36,
A. Szan o de Toledo113, I. Sza ka36, A. Szczepankiewicz34, M. Szymanski126, J. Takahashi114,
M.A. Tanga o31, J.D. Tapia TakakiVIII,46, A. Ta an ola Peloni48, A. Ta azona Ma inez34,
M.G. Ta zila72, A. Tau o34, G. Tejeda Mu˜noz2, A. Telesca34, C. Te e oli23, J. Th¨ade 91,
D. Thomas52, R. Tieulen 122, A.R. Timmins115, A. Toia102, V. T ubniko 3, W.H. T zaska116,
T. Tsuji119, A. Tumkin93, R. Tu isi102, T.S. T e e 21, K. Ullaland17, A. U as122, G.L. Usai23,
– 20 –

JHEP12(2014)073
M. Vajze 77, M. Vala54,61, L. Valencia Palomo64, S. Valle o87, P. Vande Vy e34,
J. Van De Maa el52, J.W. Van Hoo ne34, M. an Leeuwen52, A. Va gas2, M. Va gyas116,
R. Va ma44, M. Vasileiou82, A. Vasilie 94, V. Veche nin123, M. Veldhoen52, A. Velu e17,
M. Vena uzzo24,67, E. Ve cellin25, S. Ve ga a Lim´on2, R. Ve ne 8, M. Ve weij127, L. Vicko ic109,
G. Vies i28, J. Viinikainen116, Z. Vilakazi60, O. Villalobos Baillie96, A. Vinog ado 94,
L. Vinog ado 123, Y. Vinog ado 93, T. Vi gili29, Y.P. Viyogi124, A. Vodopyano 61, M.A. V¨olkl87,
K. Voloshin53, S.A. Voloshin127, G. Volpe34, B. on Halle 34, I. Vo obye 123, D. V anic91,34,
J. V l´ako ´a38, B. Vulpescu64, A. Vyushin93, B. Wagne 17, J. Wagne 91, V. Wagne 37,
M. Wang7,107, Y. Wang87, D. Wa anabe120, M. Webe 115, J.P. Wessels49, U. Wes e hoff49,
J. Wiechula33, J. Wikne21, M. Wilde49, G. Wilk71, J. Wilkinson87, M.C.S. Williams99,
B. Windelband87, M. Winn87, C.G. Yaldo127, Y. Yamaguchi119, H. Yang52, P. Yang7, S. Yang17,
S. Yano43, S. Yasnopolskiy94, J. Yi90, Z. Yin7, I.-K. Yoo90, I. Yushmano 94, V. Zaccolo74,
C. Zach37, A. Zaman15, C. Zampolli99, S. Zapo ozhe s61, A. Za ochen se 123, P. Z´a ada55,
N. Za iyalo 93, H. Zb oszczyk126, I.S. Zgu a57, M. Zhalo 79, H. Zhang7, X. Zhang7,68, Y. Zhang7,
C. Zhao21, N. Zhiga e a53, D. Zhou7, F. Zhou7, Y. Zhou52, Zhou, Zhuo17, H. Zhu7, J. Zhu7,
X. Zhu7, A. Zichichi12,26, A. Zimme mann87, M.B. Zimme mann49,34, G. Zino je 3,
Y. Zocca a o122 and M. Zyzak48
IDeceased
II Also a : S . Pe e sbu g S a e Poly echnical Uni e si y
III Also a : Depa men o Applied Physics, Aliga h Muslim Uni e si y, Aliga h, India
IV Also a : M.V. Lomonoso Moscow S a e Uni e si y, D.V. Skobel syn Ins i u e o Nuclea Physics,
Moscow, Russia
VAlso a : Uni e si y o Belg ade, Facul y o Physics and “Vinˇca” Ins i u e o Nuclea Sciences,
Belg ade, Se bia
VI Pe manen Add ess: Konkuk Uni e si y, Seoul, Ko ea
VII Also a : Ins i u e o Theo e ical Physics, Uni e si y o W oclaw, W oclaw, Poland
VIII Also a : Uni e si y o Kansas, Law ence, KS, Uni ed S a es
1A.I. Alikhanyan Na ional Science Labo a o y (Ye e an Physics Ins i u e) Founda ion, Ye e an,
A menia
2Benem´e i a Uni e sidad Au ´onoma de Puebla, Puebla, Mexico
3Bogolyubo Ins i u e o Theo e ical Physics, Kie , Uk aine
4Bose Ins i u e, Depa men o Physics and Cen e o As opa icle Physics and Space Science
(CAPSS), Kolka a, India
5Budke Ins i u e o Nuclea Physics, No osibi sk, Russia
6Cali o nia Poly echnic S a e Uni e si y, San Luis Obispo, CA, Uni ed S a es
7Cen al China No mal Uni e si y, Wuhan, China
8Cen e de Calcul de l’IN2P3, Villeu banne, F ance
9Cen o de Aplicaciones Tecnol´ogicas y Desa ollo Nuclea (CEADEN), Ha ana, Cuba
10 Cen o de In es igaciones Ene g´e icas Medioambien ales y Tecnol´ogicas (CIEMAT), Mad id, Spain
11 Cen o de In es igaci´on y de Es udios A anzados (CINVESTAV), Mexico Ci y and M´e ida, Mexico
12 Cen o Fe mi - Museo S o ico della Fisica e Cen o S udi e Rice che “En ico Fe mi”, Rome, I aly
13 Chicago S a e Uni e si y, Chicago, U.S.A.
14 Commissa ia `a l’Ene gie A omique, IRFU, Saclay, F ance
15 COMSATS Ins i u e o In o ma ion Technology (CIIT), Islamabad, Pakis an
16 Depa amen o de F´ısica de Pa ´ıculas and IGFAE, Uni e sidad de San iago de Compos ela,
San iago de Compos ela, Spain
17 Depa men o Physics and Technology, Uni e si y o Be gen, Be gen, No way
18 Depa men o Physics, Aliga h Muslim Uni e si y, Aliga h, India
– 21 –
JHEP12(2014)073
19 Depa men o Physics, Ohio S a e Uni e si y, Columbus, OH, Uni ed S a es
20 Depa men o Physics, Sejong Uni e si y, Seoul, Sou h Ko ea
21 Depa men o Physics, Uni e si y o Oslo, Oslo, No way
22 Dipa imen o di Fisica dell’Uni e si `a ‘La Sapienza’ and Sezione INFN Rome, I aly
23 Dipa imen o di Fisica dell’Uni e si `a and Sezione INFN, Caglia i, I aly
24 Dipa imen o di Fisica dell’Uni e si `a and Sezione INFN, T ies e, I aly
25 Dipa imen o di Fisica dell’Uni e si `a and Sezione INFN, Tu in, I aly
26 Dipa imen o di Fisica e As onomia dell’Uni e si `a and Sezione INFN, Bologna, I aly
27 Dipa imen o di Fisica e As onomia dell’Uni e si `a and Sezione INFN, Ca ania, I aly
28 Dipa imen o di Fisica e As onomia dell’Uni e si `a and Sezione INFN, Pado a, I aly
29 Dipa imen o di Fisica ‘E.R. Caianiello’ dell’Uni e si `a and G uppo Collega o INFN, Sale no, I aly
30 Dipa imen o di Scienze e Inno azione Tecnologica dell’Uni e si `a del Piemon e O ien ale and
G uppo Collega o INFN, Alessand ia, I aly
31 Dipa imen o In e a eneo di Fisica ‘M. Me lin’ and Sezione INFN, Ba i, I aly
32 Di ision o Expe imen al High Ene gy Physics, Uni e si y o Lund, Lund, Sweden
33 Ebe ha d Ka ls Uni e si ¨a T¨ubingen, T¨ubingen, Ge many
34 Eu opean O ganiza ion o Nuclea Resea ch (CERN), Gene a, Swi ze land
35 Facul y o Enginee ing, Be gen Uni e si y College, Be gen, No way
36 Facul y o Ma hema ics, Physics and In o ma ics, Comenius Uni e si y, B a isla a, Slo akia
37 Facul y o Nuclea Sciences and Physical Enginee ing, Czech Technical Uni e si y in P ague,
P ague, Czech Republic
38 Facul y o Science, P.J. ˇ
Sa ´a ik Uni e si y, Koˇsice, Slo akia
39 F ank u Ins i u e o Ad anced S udies, Johann Wol gang Goe he-Uni e si ¨a F ank u ,
F ank u , Ge many
40 Gangneung-Wonju Na ional Uni e si y, Gangneung, Sou h Ko ea
41 Gauha i Uni e si y, Depa men o Physics, Guwaha i, India
42 Helsinki Ins i u e o Physics (HIP), Helsinki, Finland
43 Hi oshima Uni e si y, Hi oshima, Japan
44 Indian Ins i u e o Technology Bombay (IIT), Mumbai, India
45 Indian Ins i u e o Technology Indo e, Indo e (IITI), India
46 Ins i u de Physique Nucl´eai e d’O say (IPNO), Uni e si ´e Pa is-Sud, CNRS-IN2P3, O say, F ance
47 Ins i u ¨u In o ma ik, Johann Wol gang Goe he-Uni e si ¨a F ank u , F ank u , Ge many
48 Ins i u ¨u Ke nphysik, Johann Wol gang Goe he-Uni e si ¨a F ank u , F ank u , Ge many
49 Ins i u ¨u Ke nphysik, Wes ¨alische Wilhelms-Uni e si ¨a M¨uns e , M¨uns e , Ge many
50 Ins i u Plu idisciplinai e Hube Cu ien (IPHC), Uni e si ´e de S asbou g, CNRS-IN2P3,
S asbou g, F ance
51 Ins i u e o Nuclea Resea ch, Academy o Sciences, Moscow, Russia
52 Ins i u e o Suba omic Physics o U ech Uni e si y, U ech , Ne he lands
53 Ins i u e o Theo e ical and Expe imen al Physics, Moscow, Russia
54 Ins i u e o Expe imen al Physics, Slo ak Academy o Sciences, Koˇsice, Slo akia
55 Ins i u e o Physics, Academy o Sciences o he Czech Republic, P ague, Czech Republic
56 Ins i u e o Physics, Bhubaneswa , India
57 Ins i u e o Space Science (ISS), Bucha es , Romania
58 Ins i u o de Ciencias Nuclea es, Uni e sidad Nacional Au ´onoma de M´exico, Mexico Ci y, Mexico
59 Ins i u o de F´ısica, Uni e sidad Nacional Au ´onoma de M´exico, Mexico Ci y, Mexico
60 iThemba LABS, Na ional Resea ch Founda ion, Some se Wes , Sou h A ica
61 Join Ins i u e o Nuclea Resea ch (JINR), Dubna, Russia
62 Ko ea Ins i u e o Science and Technology In o ma ion, Daejeon, Sou h Ko ea
63 KTO Ka a ay Uni e si y, Konya, Tu key
64 Labo a oi e de Physique Co pusculai e (LPC), Cle mon Uni e si ´e, Uni e si ´e Blaise Pascal,
CNRS-IN2P3, Cle mon -Fe and, F ance
65 Labo a oi e de Physique Suba omique e de Cosmologie, Uni e si ´e G enoble-Alpes, CNRS-IN2P3,
– 22 –
JHEP12(2014)073
G enoble, F ance
66 Labo a o i Nazionali di F asca i, INFN, F asca i, I aly
67 Labo a o i Nazionali di Legna o, INFN, Legna o, I aly
68 Law ence Be keley Na ional Labo a o y, Be keley, CA, Uni ed S a es
69 Law ence Li e mo e Na ional Labo a o y, Li e mo e, CA, Uni ed S a es
70 Moscow Enginee ing Physics Ins i u e, Moscow, Russia
71 Na ional Cen e o Nuclea S udies, Wa saw, Poland
72 Na ional Ins i u e o Physics and Nuclea Enginee ing, Bucha es , Romania
73 Na ional Ins i u e o Science Educa ion and Resea ch, Bhubaneswa , India
74 Niels Boh Ins i u e, Uni e si y o Copenhagen, Copenhagen, Denma k
75 Nikhe , Na ional Ins i u e o Suba omic Physics, Ams e dam, Ne he lands
76 Nuclea Physics G oup, STFC Da esbu y Labo a o y, Da esbu y, Uni ed Kingdom
77 Nuclea Physics Ins i u e, Academy o Sciences o he Czech Republic, ˇ
Reˇz u P ahy, Czech Republic
78 Oak Ridge Na ional Labo a o y, Oak Ridge, TN, Uni ed S a es
79 Pe e sbu g Nuclea Physics Ins i u e, Ga china, Russia
80 Physics Depa men , C eigh on Uni e si y, Omaha, NE, Uni ed S a es
81 Physics Depa men , Panjab Uni e si y, Chandiga h, India
82 Physics Depa men , Uni e si y o A hens, A hens, G eece
83 Physics Depa men , Uni e si y o Cape Town, Cape Town, Sou h A ica
84 Physics Depa men , Uni e si y o Jammu, Jammu, India
85 Physics Depa men , Uni e si y o Rajas han, Jaipu , India
86 Physik Depa men , Technische Uni e si ¨a M¨unchen, Munich, Ge many
87 Physikalisches Ins i u , Rup ech -Ka ls-Uni e si ¨a Heidelbe g, Heidelbe g, Ge many
88 Poli ecnico di To ino, Tu in, I aly
89 Pu due Uni e si y, Wes La aye e, IN, Uni ed S a es
90 Pusan Na ional Uni e si y, Pusan, Sou h Ko ea
91 Resea ch Di ision and Ex eMe Ma e Ins i u e EMMI, GSI Helmhol zzen um ¨u
Schwe ionen o schung, Da ms ad , Ge many
92 Rudje Boˇsko i´c Ins i u e, Zag eb, C oa ia
93 Russian Fede al Nuclea Cen e (VNIIEF), Sa o , Russia
94 Russian Resea ch Cen e Ku cha o Ins i u e, Moscow, Russia
95 Saha Ins i u e o Nuclea Physics, Kolka a, India
96 School o Physics and As onomy, Uni e si y o Bi mingham, Bi mingham, Uni ed Kingdom
97 Secci´on F´ısica, Depa amen o de Ciencias, Pon i icia Uni e sidad Ca ´olica del Pe ´u, Lima, Pe u
98 Sezione INFN, Ba i, I aly
99 Sezione INFN, Bologna, I aly
100 Sezione INFN, Caglia i, I aly
101 Sezione INFN, Ca ania, I aly
102 Sezione INFN, Pado a, I aly
103 Sezione INFN, Rome, I aly
104 Sezione INFN, T ies e, I aly
105 Sezione INFN, Tu in, I aly
106 SSC IHEP o NRC Ku cha o ins i u e, P o ino, Russia
107 SUBATECH, Ecole des Mines de Nan es, Uni e si ´e de Nan es, CNRS-IN2P3, Nan es, F ance
108 Su ana ee Uni e si y o Technology, Nakhon Ra chasima, Thailand
109 Technical Uni e si y o Spli FESB, Spli , C oa ia
110 The Hen yk Niewodniczanski Ins i u e o Nuclea Physics, Polish Academy o Sciences, C acow,
Poland
111 The Uni e si y o Texas a Aus in, Physics Depa men , Aus in, TX, U.S.A.
112 Uni e sidad Au ´onoma de Sinaloa, Culiac´an, Mexico
113 Uni e sidade de S˜ao Paulo (USP), S˜ao Paulo, B azil
114 Uni e sidade Es adual de Campinas (UNICAMP), Campinas, B azil
– 23 –
JHEP12(2014)073
115 Uni e si y o Hous on, Hous on, TX, Uni ed S a es
116 Uni e si y o Jy ¨askyl¨a, Jy ¨askyl¨a, Finland
117 Uni e si y o Li e pool, Li e pool, Uni ed Kingdom
118 Uni e si y o Tennessee, Knox ille, TN, Uni ed S a es
119 Uni e si y o Tokyo, Tokyo, Japan
120 Uni e si y o Tsukuba, Tsukuba, Japan
121 Uni e si y o Zag eb, Zag eb, C oa ia
122 Uni e si ´e de Lyon, Uni e si ´e Lyon 1, CNRS/IN2P3, IPN-Lyon, Villeu banne, F ance
123 V. Fock Ins i u e o Physics, S . Pe e sbu g S a e Uni e si y, S . Pe e sbu g, Russia
124 Va iable Ene gy Cyclo on Cen e, Kolka a, India
125 Ves old Uni e si y College, Tonsbe g, No way
126 Wa saw Uni e si y o Technology, Wa saw, Poland
127 Wayne S a e Uni e si y, De oi , MI, Uni ed S a es
128 Wigne Resea ch Cen e o Physics, Hunga ian Academy o Sciences, Budapes , Hunga y
129 Yale Uni e si y, New Ha en, CT, Uni ed S a es
130 Yonsei Uni e si y, Seoul, Sou h Ko ea
131 Zen um ¨u Technologie ans e und Telekommunika ion (ZTT), Fachhochschule Wo ms, Wo ms,
Ge many
– 24 –