Mic oBooNE's beyond
he S anda d Model
physics p og am
M. Nebo -Guino
o he
Mic ooBooNE
Collabo a ion
M.Nebo -Guino
Mic oBooNE's beyond he S anda d Model physics p og am
•The Mic oBooNE
expe imen "
•BSM sea ches in
Mic oBooNE
2
Ou line
M.Nebo -Guino
Mic oBooNE's beyond he S anda d Model physics p og am
3
Ou line
•The Mic oBooNE
expe imen "
•BSM sea ches in
Mic oBooNE
M.Nebo -Guino
Neu inos a he Main Injec o (NuMI) beam
(BNB)
4
SBND (110m) !
aking da a
ICARUS (600m)!
aking da a
The Sho Baseline Neu ino (SBN) p og am a Fe milab
A mul i‐de ec o and mul i-beam acili y on he Boos e Neu ino Beam (& Neu inos a he Main Injec o beam) a
Fe milab o es MiniBooNE’s anomaly.$
I uses he same neu ino beam, nuclea a ge , de ec o echnology o educe sys ema ic unce ain ies.
•Neu ino beam om pion decay-in- ligh mos ly. Well-known beam, same as MiniBooNE (PRD 79, 072002).$
The same mechanisms ha p oduce neu inos a e g ea sou ces o po en ial BSM pa icles. "
•3 Liquid A gon Time P ojec ion Chambe (LA TPC) de ec o s.
The Mic oBooNE expe imen
Mic oBooNE (470m) !
inished aking da a 2021
Fo mo e de ails see!
Ch is ian Fa nese’s alk
Fo mo e de ails see!
London’s, Jai o’s, Fan’s alks
Fo mo e de ails see!
my o he alk
M.Nebo -Guino
5
Why LA TPCs?
The Mic oBooNE expe imen
•MiniBooNE: 600 ac i e olume mine al oil Che enko de ec o $
→ poo e/γ sepa a ion and mos had onic ac i i y missed. "
•LA TPCs a e capable o iden i ying diffe en species o pa icles$
econs uc ing 3D images wi h ine-g ained in o ma ion.$
Neu ino e ex, pa icle low, ack s. showe …
M.Nebo -Guino
Run 8617 Sub un 46 E en 2329
6
Why LA TPCs?
The Mic oBooNE expe imen
•MiniBooNE: 600 ac i e olume mine al oil Che enko de ec o $
→ poo e/γ sepa a ion and mos had onic ac i i y missed. "
•LA TPCs a e capable o iden i ying diffe en species o pa icles$
econs uc ing 3D images wi h ine-g ained in o ma ion.$
Neu ino e ex, pa icle low, ack s. showe …
•T acks: Simple line segmen s → single highe -mass pa icle
( , , , e c.)"
•Showe s: B anching clus e s o line segmen s$
o pai leads o a cascade o elec omagne ic
ac i i y ( , , )
p
π±
μ±
e±
γ→e+e−
γ
e+
e−
M.Nebo -Guino
Run 8617 Sub un 46 E en 2329
7
Why LA TPCs?
The Mic oBooNE expe imen
Elec on s gamma disc imina ion:
•Con e sion gap"
•dE/dx a s a o showe
•MiniBooNE: 600 ac i e olume mine al oil Che enko de ec o $
→ poo e/γ sepa a ion and mos had onic ac i i y missed. "
•LA TPCs a e capable o iden i ying diffe en species o pa icles$
econs uc ing 3D images wi h ine-g ained in o ma ion.$
Neu ino e ex, pa icle low, ack s. showe …
•T acks: Simple line segmen s → single highe -mass pa icle
( , , , e c.)"
•Showe s: B anching clus e s o line segmen s$
o pai leads o a cascade o elec omagne ic
ac i i y ( , , )
p
π±
μ±
e±
γ→e+e−
γ
e+
e−
M.Nebo -Guino
Run 9524 Sub un 127 E en 6375
Run 8617 Sub un 46 E en 2329
8
Why LA TPCs?
The Mic oBooNE expe imen
Elec on s gamma disc imina ion:
: no gap
e−
: isible gap
γ
•Con e sion gap"
•dE/dx a s a o showe
•MiniBooNE: 600 ac i e olume mine al oil Che enko de ec o $
→ poo e/γ sepa a ion and mos had onic ac i i y missed. "
•LA TPCs a e capable o iden i ying diffe en species o pa icles$
econs uc ing 3D images wi h ine-g ained in o ma ion.$
Neu ino e ex, pa icle low, ack s. showe …
•T acks: Simple line segmen s → single highe -mass pa icle
( , , , e c.)"
•Showe s: B anching clus e s o line segmen s$
o pai leads o a cascade o elec omagne ic
ac i i y ( , , )
p
π±
μ±
e±
γ→e+e−
γ
e+
e−
M.Nebo -Guino
Run 9524 Sub un 127 E en 6375
Run 8617 Sub un 46 E en 2329
9
Why LA TPCs?
•MiniBooNE: 600 ac i e olume mine al oil Che enko de ec o $
→ poo e/γ sepa a ion and mos had onic ac i i y missed. "
•LA TPCs a e capable o iden i ying diffe en species o pa icles$
econs uc ing 3D images wi h ine-g ained in o ma ion.$
Neu ino e ex, pa icle low, ack s. showe …
Aux. ma e ial Phys.Re .Le . 135 (2025) 8, 081802
The Mic oBooNE expe imen
•T acks: Simple line segmen s → single highe -mass pa icle
( , , , e c.)"
•Showe s: B anching clus e s o line segmen s$
o pai leads o a cascade o elec omagne ic
ac i i y ( , , )
p
π±
μ±
e±
γ→e+e−
γ
e+
e−
Elec on s gamma disc imina ion:
: no gap
e−
: isible gap
γ
•Con e sion gap"
•dE/dx a s a o showe
: low dE/dx
e−
: high dE/dx
γ
M.Nebo -Guino
16
Mic oBooNE BSM p og am
The Mic oBooNE expe imen
M.Nebo -Guino
Mic oBooNE's beyond he S anda d Model physics p og am
17
Ou line
•The Mic oBooNE
expe imen "
•BSM sea ches in
Mic oBooNE
M.Nebo -Guino
BSM sea ches in Mic oBooNE
• Sea ch o 3+1 (eV) s e ile neu ino
oscilla ion. "
•Using BNB inclusi e sea ch o
look a 3+1 model, la ge phase
space ejec ed a 95% CLs"
•Degene acy when sin2 𝜃24 ≈
0.005 gi en (𝐵𝑁𝐵) ≈ 185 "
νe
Rνμ/νe
18
Ligh s e ile neu ino
4−
10 3−
10 2−
10 1−
10 1
eµ
θ2
2
sin
2−
10
1−
10
1
10
2
10
)
2
(eV
41
2
m∆
(allowed)σMiniBooNE 2
(allowed)σMiniBooNE 3
MiniBooNE Bes Fi
POT
20
10×Mic oBooNE 6.369
s
P o iling, 95% CL
(App. + Disapp.)
Excluded
Phys. Re . Le . 130, 011801 (2023)
M.Nebo -Guino
19
Ligh s e ile neu ino
4−
10 3−
10 2−
10 1−
10 1
eµ
θ2
2
sin
2−
10
1−
10
1
10
2
10
)
2
(eV
41
2
m∆
(allowed)σMiniBooNE 2
(allowed)σMiniBooNE 3
MiniBooNE Bes Fi
POT
20
10×Mic oBooNE 6.369
s
P o iling, 95% CL
(App. + Disapp.)
Excluded
Phys. Re . Le . 130, 011801 (2023)
•Degene acy mi iga ed by adding
da a om NuMI beamline ≈ 21
Rνμ/νe
MICROBOONE-NOTE-1132-PUB
S ay uned o he ull esul !
BSM sea ches in Mic oBooNE
• Sea ch o 3+1 (eV) s e ile neu ino
oscilla ion. "
•Using BNB inclusi e sea ch o
look a 3+1 model, la ge phase
space ejec ed a 95% CLs"
•Degene acy when sin2 𝜃24 ≈
0.005 gi en (𝐵𝑁𝐵) ≈ 185 "
νe
Rνμ/νe
M.Nebo -Guino
Hea y Neu al
Lep ons
NuMI
Abso be
Kaons
P o ons
•Fi s sea ch o 𝑵 → 𝝂 𝒆+𝒆−
o 𝑵 → 𝝂 𝝅𝟎 inal s a es in a
LA TPC
20
Hea y Neu al Lep ons (HNL)
F om NuMI
Abso be
BSM sea ches in Mic oBooNE
M.Nebo -Guino
Hea y Neu al
Lep ons
NuMI
Abso be
Kaons
P o ons
•Fi s sea ch o 𝑵 → 𝝂 𝒆+𝒆−
o 𝑵 → 𝝂 𝝅𝟎 inal s a es in a
LA TPC
21
Hea y Neu al Lep ons (HNL)
F om NuMI
Abso be
𝑁 → 𝜈 𝑒+𝑒−
𝑁 → 𝜈 𝜋0
•Se limi s on |Uμ4| 2 as a unc ion o HNL mass $
10 ≤ mHNL ≤ 150 MeV ( 𝜈𝑒+𝑒− channel) $
150 ≤ mHNL ≤ 245 MeV ( 𝜈𝜋0 channel)
Phys. Re . Le . 132, 041801 (2024)
BSM sea ches in Mic oBooNE
M.Nebo -Guino
•Neu al scala single S,
mixing angle 𝜽 wi h he
Higgs boson "
•P oduc ion om kaon
decay "
•Signa u e: 𝑺 → 𝒆+𝒆−
22
Higgs Po al Scala s
Higgs Po al
Scala s
Kaons
NuMI
Abso be
BSM sea ches in Mic oBooNE
M.Nebo -Guino
•Neu al scala single S,
mixing angle 𝜽 wi h he
Higgs boson "
•P oduc ion om kaon
decay "
•Signa u e: 𝑺 → 𝒆+𝒆−
23
Higgs Po al Scala s
Higgs Po al
Scala s
Kaons
NuMI
Abso be
a Xi :2501.08052
New!
•Se s onges limi s o da e a 95% CL:
A mS = 125 MeV, θ < 2.65 × 10−4 $
A mS = 150 MeV, θ < 1.72 × 10−4
BSM sea ches in Mic oBooNE
M.Nebo -Guino
24
Ligh da k ma e
Ligh Da k
Ma e
•Fi s sea ch o da k- iden
using a LA TPC
BSM sea ches in Mic oBooNE
P oduc ion $
DM pa icle p oduced in beam and in e ac s
in Mic oBooNE Da k pho on media o 𝑨′
Sca e !
Da k pho on media o 𝑨′ → 𝒆+𝒆−
M.Nebo -Guino
25
Ligh da k ma e
Ligh Da k
Ma e
•Fi s sea ch o da k- iden
using a LA TPC
P oduc ion $
DM pa icle p oduced in beam and in e ac s
in Mic oBooNE Da k pho on media o 𝑨′
Sca e !
Da k pho on media o 𝑨′ → 𝒆+𝒆−
MA′ = 300 MeV
•Pa ame e s o he model: $
• da k pho on (M𝑨′) $
• da k scala (o e mion) (Mχ) "
•Se wo ld-leading limi s on his
Ligh Da k Ma e model
Phys. Re . Le . 132, 241801 (2024)
BSM sea ches in Mic oBooNE
•Mic oBooNE main physics goal:$
In es iga e he MiniBooNE “Low Ene gy Excess” "
•Same BNB beam, baseline bu new de ec o !
32
MiniBooNE νe
10.1103/PhysRe D.103.052002
Main backg ounds:
•Addi ional physics p og am:$
BSM, 𝜈-A in e ac ions, LA TPC R&D
•MiniBooNE was buil o es LSND anomaly."
•Wi h da a collec ed om 2002 o 2019, sees a 4.8σ
excess o 𝜈e candida e e en s"
•Neu ino and an i-neu ino inal i s consis en wi h
LSND allowed egions.
I excess is uly elec on neu inos om
oscilla ion hen could be e idence o a 3+N
s e ile neu ino heo y
Sho -Baseline neu ino anomalies
M.Nebo -Guino
M.Nebo -Guino
33
Ti le Tex
27
▪Da a aking
▪BNB Full Da ase : 1.1 X 1021 POT ▪NuMI Full Da ase : 2.37 X 1021 POT
| Diego And ade | Lep on-Pho on 2025
•Mic oBooNE collec ed BNB and NuMI da a be ween 2015 and 2021 spli in o i e uns
M.Nebo -Guino
34
Ti le Tex
6
Beamlines
~470 m
| Diego And ade | Lep on-Pho on 2025
•La ge lux o cha ged/neu al mesons om high in ensi y p o on beams
•New pa icles can be p oduced om meson decays
•P oximi y o he NuMI abso be
→ Pa icles su i e long enough o each Mic oBooNE
▪Neu ino Beamlines a Fe milab
TEAM NAME
PLAYER NAME
TEAM NAME
PLAYER NAME
TEAM NAME
PLAYER NAME
TEAM NAME
PLAYER NAME
NuMI
TEAM NAME
PLAYER NAME
TEAM NAME
PLAYER NAME
TEAM NAME
PLAYER NAME
TEAM NAME
PLAYER NAME
BNB
•8° off-axis"
•95% $
5% "
•120 GeV POT"
•50/50
νμ
νe
ν/ ¯ν
•on-axis"
•99.5% $
0.5% "
• 8 GeV POT
νμ
νe
BSM Possibili ies
o he LEE
Snowmass Whi e Pape on Ligh S e ile Neu inos"
J. Phys. G: Nucl. Pa . Phys. 51 120501 (2024)
•The MiniBooNE LEE has o en been
in e p e ed as an excess o
e en s, po en ially om s e ile neu ino
sho baseline oscilla ions"
•Bu he e a e lo s o well mo i a ed
beyond-s anda d-model possibili ies
o and e en s as well
e−
νμ→νe
γ
e+e−
M.Nebo -Guino
eV-scale s e ile neu ino sea ches
36
Ti le Tex
•Rein e p e LEE analysis unde 3+1 s e ile neu ino oscilla ion amewo k
νe
PRL 130 (2023) 1, 01180
inclusi e analysis. pe o med wi h BNB da a."
νe
Sensi i i y no s a is ics limi ed!"
Mic oBooNE’s ’22 analyis: 3+1 wi h BNB
M.Nebo -Guino
eV-scale s e ile neu ino sea ches
•3+1 degene acy: $
appea ance cancels ou disappea ance"
•Degene acy depends on in insic a e o s. in he beam. $
Fo BNB
νe
νe
νe
νμ
Nνμ
Nνe
∼200
37
•Impac on NuMI spec um is la ge due o he
diffe en "
•NuMI beam allows us o b eak he degene acy
νe
Nνμ
Nνe
∼25
Upda ed NuMI lux a
Mic oBooNE
MICROBOONE-
NOTE-1129-PUB
BNB + NuMI
eV-scale s e ile neu ino sea ches
M.Nebo -Guino
38
Ti le Tex
Hea y Neu al Lep ons (HNLs)
Magnus Handley – [email protected] 14
HNLs No
p oduced he e i
|Ue4|=0
•Kinema ic uppe bound o ~390 MeV o he
HNL masses we can p obe a uBooNE
•Dominan isible s a es below his a e:
1. e+e-", )'< )()
2. +)", )() < )'< )($
3. -+", )'> " )($
M.Nebo -Guino
39
Ti le Tex
30
▪Ongoing BSM sea ches
| Diego And ade | Lep on-Pho on 2025
M.Nebo -Guino
40
Ti le Tex
Mic oBooNE Collabo a ion
A gonne Na ional Labo a o y: Z. Dju cic, A. Ra ique
Uni e si y o Be n, Swi ze land: R. Diu ba, S. Mulle iababu,M. Webe
B ookha en: M. Bishai, J. Calcu , W. Gu, J.H. Jo, M. Ki by, Y. Li, S. Ma ynenko,N. Nayak, X. Qian, V. Radeka, D. To buno ,B. Vi en, H. Yu, C. Zhang
Uni e si y o Cali o nia, San a Ba ba a: S. B ickne , D. Ca a elli,C. Fang, F. Gao, X. Luo, L. Nguyen, C. Saue
Uni e si y o Camb idge: S. Dennis, P. De je,M. Handley, K. W esilo
Uni e si y o Chicago: A. Bha , A. E edi a o (join wi h FNAL), B.T. Fleming, D. F anco, D.W. Schmi z, A. Whi e
CIEMAT: J. C espo
Uni e si y o Cincinna i: R.A. Johnson
Colo ado S a e Uni e si y: D. Ca be , M. Mooney,D. To ani
Columbia Uni e si y: L. Camille i, S. Chung, D. Kal a, L. Hagaman, G. Ka agio gi, K. Kuma , N. Oza,M. Ross-Lone gan, W. Seligman, M. Shae i z
Uni e si y o Edinbu gh: C. Ba chelo , M. Nebo -Guino , H. Pa kinson, A.M. Szelc, W. Wang
Fe milab: V. Basque, M. Bha acha ya, F. Ca anna, G. Ce a i, M. Del Tu o, A. E edi a o (join wi h Chicago), S. Ga dine , H. G eenlee,
C. James, W. Ke chum, T. Kobila cik, J. Li, L Liu, C. Moo e, O. Palama a, Z. Pa lo ic, J.L. Raa , A. Schuk a , R. Sha anko a, E. Snide ,
M. S anca i, J. S . John, T. S auss, M. Toups*, S. Wolbe s, G.P. Zelle , J, Zennamo
Uni e si y o G anada: D. Gamez
Illinois Ins i u e o Technology: D. And ade Aldana, O. Rod iguez, B. Li lejohn, M. G. Manuel Al es
Impe ial College London: A. He genhan, A. Na e -Agasson, S. Söldne -Rembold, M. Uchida
Indiana Uni e si y: A. Binau, A. Johnson, A. Kelly, F. Ma inez Lopez, B. McConnell T. Mohayai
Kansas S a e Uni e si y: T. Bol on, G. Ho on-Smi h, A. Hussain, N. Majeed, J. Tyle
Uni e si y o Kansas: M. B. B une i
Lancas e Uni e si y: A. Blake, I. Mawby, J. Nowak, N. Pa el, I. Pophale
Los Alamos: V. Bhelande,W Fo eman, S. Gollapinni, W.C. Louis, A. Papadopoulou, L. Sil a, E. Yandel
Louisiana S a e Uni e si y: J. Mendez, H. Wei
Uni e si y o Manches e : J. Ba eman, J. Bu idge, J.J. E ans*, E. G amellini, R. Guene e, N. Lane, M. Moudgalya, C. Tho pe, A. T e in
MIT-HEP:J.M. Con ad, J. Micalle (join wi h Tu s)
MIT-NP:O. Hen
Michigan S a e Uni e si y: S. Be kman, S. Hawkins, L. Melle ,K. Ple che
Uni e si y o Michigan, Ann A bo : B. Boga , J. Spi z
Uni e si y o Minneso a: J. Ba ow, A. Fu manski, K. Hildeb and , B. I win, N. Palla
Nankai Uni e si y: X. Ji, , S. Liu, S. Zhai
New Mexico S a e Uni e si y: V. Papa assiliou, S.F. Pa e, L. Ren
Uni e si y o No e Dame: L. Ya es
Uni e si y o Ox o d: A. Ba na d, G. Ba , D. Ba ow, K. Du y, P. G een
Uni e si y o Pi sbu gh: L. Coope -T oendle, S. Dy man, M. Ismail, D. Naples, V. Paolone, W. Wu
Queen Ma y Uni e si y o London: N. McConkey
Ru ge s: P. Englezos, K. Lin, A. Mas baum, C. Nguyen
SLAC: Y. Chen, M. Con e y, K. Te ao, Y-T. Tsai, T. Ushe
Sou h Dako a School o Mines & Technology : B. Behe a, D. Ma inez, J. Rod iguez Rondon,
Uni e si y o Sou he n Maine: B. Ebe ly
Tel A i Uni e si y: A. Ashkenazi, A. G ube , L. Ral e
Uni e si y o Texas a A ling on: J. Asaadi
Tu s Uni e si y: P. Ab a enko, O. Al e kai , V. DaSil a, Z. Imani, , J. Micalle (join wi h MIT), M. Rosenbe g, T. Wongji ad
Vi ginia Tech: C. Ma iani
Uni e si y o Wa wick: A. Chappell, R. C oss, J. Ma shall
*spokespeople
185 collabo a o s
41 ins i u ions
42 pos docs
52 g ad s uden s
(33% in e na ional s uden s)
no e: also includes Mas e s, pos -bacc
Augus 2025
M.Nebo -Guino
41
Ti le Tex
Mic oBooNE pape s
