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BSM at Colliders
Sho IWAMOTO
This 2-hour presentation is based on my works
M. Endo, K. Hamaguchi, SI, N. Yokozaki, Higgs mass, muon g−2, and LHC prospects in gauge mediation models with vector-like matters [1112.5653]
M. Endo, K. Hamaguchi, SI, T. Yoshinaga, Muon g−2 vs LHC in Supersymmetric Models [1303.4256]
J. L. Feng, SI, Y. Shadmi, S. Tarem, Long-Lived Sleptons at the LHC and a 100 TeV Proton Collider [1505.02996]
M. Abdullah, J. L. Feng, SI, B. Lillard , Heavy Bino Dark Matter and Collider Signals in the MSSM with Vector-like 4th-Generation Particles [1608.00283]
and many works by others. Several citations could be missing; sorry for the incompleteness.
18‒19 Oct. 2016 “Search for New Physics through the Higgs boson” @ Gwangju
BSM at Colliders?
2 /134
BSM at Colliders?
3 /134
BSM at Colliders?
4 /134
= our Universe
BSM at Colliders?
5 /134
= our Universe
dark matter?
BSM at Colliders?
6 /134
= our Universe
dark matter? dark energy?
BSM at Colliders?
7 /134
Many hints of BSM
Dark matter
Dark energy
Neutrino mass
Gauge coupling unification
Higgs mass (“naturalness”)
Muon “g−2”
…
BSM at Colliders?
8 /134
SUSY
composite Higgs
composite DM
extra dimensions
extended Higgs
…
Many hints of BSM
Dark matter
Dark energy
Neutrino mass
Gauge coupling unification
Higgs mass (“naturalness”)
Muon “g−2”
…
SUSY
composite Higgs
composite DM
extra dimensions
extended Higgs
…
LHC
future pp collider
future ee collider
BSM at Colliders?
9 /134
SUSY
composite Higgs
composite DM
extra dimensions
extended Higgs
…
LHC
future pp collider
future ee collider
BSM at Colliders?
10 /134
SUSY
composite Higgs
composite DM
extra dimensions
extended Higgs
…
LHC
future pp collider
future ee collider
BSM at Colliders?
11 /134
“strange” signature ??
SUSY
composite Higgs
composite DM
extra dimensions
extended Higgs
…
LHC
future pp collider
future ee collider
BSM at Colliders?
12 /134
“strange” signature ??
high energy
high precision
[long-lived charged/colored particle]
new heavy particles
stable & neutral
stable & charged exotic tracks (LLCP)
unstable decay products
resonance
“more exotic” signatures
deviation in known parameters
Higgs-, top-, and EW-sectors.
13 /134
LHC
future pp collider
future ee collider
high energy
high precision
[long-lived charged/colored particle]
LHC
future pp collider
future ee collider
new heavy particles
stable & neutral
stable & charged exotic tracks (LLCP)
unstable decay products
resonance
“more exotic” signatures
deviation in known parameters
Higgs-, top-, and EW-sectors.
14 /134
LHC
FCC-pp 15 /134
SUSY
composite Higgs
composite DM
extra dimensions
extended Higgs
…
Dark matter
Dark energy
Neutrino mass
Gauge coupling unification
Higgs mass (“naturalness”)
Muon “g−2”
…
resonances
LLCP
“more exotic”
LHC
FCC-pp 16 /134
SUSY
composite Higgs
composite DM
extra dimensions
extended Higgs
…
Dark matter
Dark energy
Neutrino mass
Gauge coupling unification
Higgs mass (“naturalness”)
Muon “g−2”
…
resonances
LLCP
“more exotic”
hep-ex
LHC
FCC-pp 17 /134
SUSY
composite Higgs
composite DM
extra dimensions
extended Higgs
…
Dark matter
Dark energy
Neutrino mass
Gauge coupling unification
Higgs mass (“naturalness”)
Muon “g−2”
…
resonances
LLCP
“more exotic”
Outline
1)
2) LLCP
3) more exotic
18 /134
Missing energy at the LHC
19 /134
: primary search target @ LHC
proton proton
Dark matter
…neutral & (almost) stable
Missing energy at the LHC
20 /134
: primary search target @ LHC
proton proton q/g q/g
Dark matter
…neutral & (almost) stable
Missing energy at the LHC
21 /134
: primary search target @ LHC
proton proton q/g q/g
DM
DM
Dark matter
…neutral & (almost) stable
Missing energy at the LHC
22 /134
: primary search target @ LHC
proton proton q/g q/g
DM
DM
Dark matter
…neutral & (almost) stable
Missing energy at the LHC
23 /134
mET : primary search target @ LHC
proton proton q/g q/g
(mET)
Dark matter
…neutral & (almost) stable
Missing energy at the LHC
24 /134
mET : primary search target @ LHC
We cannot “see” mET.
mET + something
from ISR: “mono-jet” “mono-photon” etc. DM searches at LHC (Shih-Chieh Hsu’s talk)
from cascade decay: “SUSY” searches
“SUSY” searches at the LHC
25 /134
“SUSY” searches : something + mET
the list of “something”
“SUSY” searches at the LHC
26 /134
“SUSY” searches : something + mET
… What is “something”?
hep-ex people: We will look at anything we can see!
... if we had infinite time.
hep-ph people will answer
based on their theory
hep-ex hep-ph
“what should we see at first?”
SUSY
27 /134
A theory : SUSY (supersymmetry)
SM MSSM
Boson — Fermion
[Higgsino]
[smu]
[squark]
+SUSY
SUSY
28 /134
MSSM =
Image by MissBJ [CC BY 3.0], via Wikimedia Commons (changes were made by S.I.)
[Standard Model]
[Minimal Supersymmetric Standard Model]
SUSY
29 /134
MSSM =
Image by MissBJ [CC BY 3.0], via Wikimedia Commons (changes were made by S.I.)
[Minimal Supersymmetric Standard Model]
SUSY
30 /134
MSSM =
Image by MissBJ [CC BY 3.0], via Wikimedia Commons (changes were made by S.I.)
SUSY
31 /134
Why SUSY?
( )
Dark matter
Dark energy
Neutrino mass
Gauge coupling unification
Higgs mass “naturalness”
Muon “g−2”
…
Outline
1)
2) LLCP
3) more exotic
32 /134
“SUSY” filter
Naturalness problem
33 /134
104 GeV2 cut-off (Planck or GUT scale)
unnatural
Naturalness problem
34 /134
104 GeV2 cut-off (Planck or GUT scale)
cancel
Naturalness problem little hierarchy problem
35 /134
104 GeV2 cut-off (Planck or GUT scale)
cancel
Kitano, Nomura [hep-ph/0602096]
“natural” if
Naturalness problem little hierarchy problem
36 /134
cancel
“natural” if
Kitano, Nomura [hep-ph/0602096]
MSSM condition for EWSB:
“natural” if
Higgsino mass
Naturalness problem little hierarchy problem
37 /134
Papucci, Ruderman, Weiler [1110.6926]
“Natural SUSY”
interesting channel: “stop search”
(and squark/gluon search
)
[GeV]t~m
200 400 600 800 1000 1200
[G
eV
]10
c~m
0
100
200
300
400
500
600
700
800
900
CMS Preliminary
10c~ t® t
~, t
~t~ ®pp ICHEP 2016
13 TeVExpected
Observed-1
), 12.9 fbmissTSUS-16-014, 0-lep (H
-1), 12.9 fbT2SUS-16-015, 0-lep (M
-1), 12.9 fbTaSUS-16-016, 0-lep (
-1SUS-16-029, 0-lep stop, 12.9 fb
-1SUS-16-030, 0-lep (top tag), 12.9 fb
-1SUS-16-028, 1-lep stop, 12.9 fb
-1Combination 0-lep and 1-lep stop, 12.9 fb
0
1c~
+ m
t
= m
t~m
Naturalness stop search
38 /134
10% tuning
20% tuning
Naturalness stop search
39 /134
10% tuning
20% tuning
last resort?? Do we need more fine-tune?
Cf. gluon searches
40 /134
10% tuning
20% tuning
A comment on Naturalness: Higgs mass = 125 GeV
41 /134
LHC:
tree
stop left-right mixing α is Large and/or
(at least one) heavy stop
disfavors “natural”
A comment on Naturalness: Higgs mass = 125 GeV
42 /134
LHC:
tree
stop left-right mixing α is Large and/or
(at least one) heavy stop
A comment on Naturalness: Higgs mass = 125 GeV
43 /134
A canonical illustration: Hall, Pinner, Ruderman [1112.2703]
Outline
1)
2) LLCP
3) more exotic
44 /134
“SUSY” filter
Muon g−2 anomaly: Overview
45 /134
Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]
Muon g−2 [anomalous magnetic moment]
…3.3σ
extra contribution? MSSM!
Muon g−2 SM expectation : discrepancy!
46 /134
QED W,Z,H
(5-loop) (2+-loop)
QCD
QED: Aoyama, Hayakawa, Kinoshita, Nio [1205.5370]. EW: Gnendiger, Stöckinger, Stöckinger-Kim [1306.5546]. HVP: Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]. HLbL: Prades, De Rafael, Vainshtein [0901.0306].
See also: HVP-LO: Davier, Hoecker, Malaescu, Zhang [1010.4180], HVP-HO: Kurz, Liu, Marquard, Steinhauser [1403.6400], HLbL: Jegerlehner, Nyffeler [0902.3360], Colangelo, Hoferichter, Nyffeler, Passera, Stoffer [1403.7512]
Muon g−2 SM expectation : discrepancy!
47 /134
QED W,Z,H
(5-loop) (2+-loop)
QCD
QED: Aoyama, Hayakawa, Kinoshita, Nio [1205.5370]. EW: Gnendiger, Stöckinger, Stöckinger-Kim [1306.5546]. HVP: Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]. HLbL: Prades, De Rafael, Vainshtein [0901.0306].
See also: HVP-LO: Davier, Hoecker, Malaescu, Zhang [1010.4180], HVP-HO: Kurz, Liu, Marquard, Steinhauser [1403.6400], HLbL: Jegerlehner, Nyffeler [0902.3360], Colangelo, Hoferichter, Nyffeler, Passera, Stoffer [1403.7512]
Muon g−2 SM expectation : discrepancy!
48 /134
QED W,Z,H
(5-loop) (2+-loop)
QCD
QED: Aoyama, Hayakawa, Kinoshita, Nio [1205.5370]. EW: Gnendiger, Stöckinger, Stöckinger-Kim [1306.5546]. HVP: Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]. HLbL: Prades, De Rafael, Vainshtein [0901.0306].
See also: HVP-LO: Davier, Hoecker, Malaescu, Zhang [1010.4180], HVP-HO: Kurz, Liu, Marquard, Steinhauser [1403.6400], HLbL: Jegerlehner, Nyffeler [0902.3360], Colangelo, Hoferichter, Nyffeler, Passera, Stoffer [1403.7512]
Muon g−2 SM expectation : discrepancy!
49 /134
had. vac. polarization
QED W,Z,H
(5-loop) (2+-loop) (low-energy EFT) (dispersion rel.)
had. light-by-light
See also: HVP-LO: Davier, Hoecker, Malaescu, Zhang [1010.4180], HVP-HO: Kurz, Liu, Marquard, Steinhauser [1403.6400], HLbL: Jegerlehner, Nyffeler [0902.3360], Colangelo, Hoferichter, Nyffeler, Passera, Stoffer [1403.7512]
QED: Aoyama, Hayakawa, Kinoshita, Nio [1205.5370]. EW: Gnendiger, Stöckinger, Stöckinger-Kim [1306.5546]. HVP: Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]. HLbL: Prades, De Rafael, Vainshtein [0901.0306].
Muon g−2 SM expectation : discrepancy!
50 /134
had. vac. polarization
QED W,Z,H
(5-loop) (2+-loop) (low-energy EFT) (dispersion rel.)
had. light-by-light
+)
See also: HVP-LO: Davier, Hoecker, Malaescu, Zhang [1010.4180], HVP-HO: Kurz, Liu, Marquard, Steinhauser [1403.6400], HLbL: Jegerlehner, Nyffeler [0902.3360], Colangelo, Hoferichter, Nyffeler, Passera, Stoffer [1403.7512]
QED: Aoyama, Hayakawa, Kinoshita, Nio [1205.5370]. EW: Gnendiger, Stöckinger, Stöckinger-Kim [1306.5546]. HVP: Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]. HLbL: Prades, De Rafael, Vainshtein [0901.0306].
Muon g−2 SM expectation : discrepancy!
51 /134
had. vac. polarization
QED W,Z,H
(5-loop) (2+-loop) (low-energy EFT) (dispersion rel.)
had. light-by-light
+)
See also: HVP-LO: Davier, Hoecker, Malaescu, Zhang [1010.4180], HVP-HO: Kurz, Liu, Marquard, Steinhauser [1403.6400], HLbL: Jegerlehner, Nyffeler [0902.3360], Colangelo, Hoferichter, Nyffeler, Passera, Stoffer [1403.7512]
QED: Aoyama, Hayakawa, Kinoshita, Nio [1205.5370]. EW: Gnendiger, Stöckinger, Stöckinger-Kim [1306.5546]. HVP: Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]. HLbL: Prades, De Rafael, Vainshtein [0901.0306].
3.3σ anomaly
Muon g−2 SM expectation : discrepancy!
52 /134
had. vac. polarization
QED W,Z,H
(5-loop) (2+-loop) (low-energy EFT) (dispersion rel.)
had. light-by-light
+)
See also: HVP-LO: Davier, Hoecker, Malaescu, Zhang [1010.4180], HVP-HO: Kurz, Liu, Marquard, Steinhauser [1403.6400], HLbL: Jegerlehner, Nyffeler [0902.3360], Colangelo, Hoferichter, Nyffeler, Passera, Stoffer [1403.7512]
QED: Aoyama, Hayakawa, Kinoshita, Nio [1205.5370]. EW: Gnendiger, Stöckinger, Stöckinger-Kim [1306.5546]. HVP: Hagiwara, Liao, Martin, Nomura, Teubner [1105.3149]. HLbL: Prades, De Rafael, Vainshtein [0901.0306].
3.3σ anomaly
Lopez, Nanopoulos, Wang [ph/9308336] Chattopadhyay, Nath [ph/9507386]
Moroi [ph/9512396]
Muon g−2 anomaly can be solved by SUSY
53 /134
SM SUSY ?
MSSM Drell-Yan cross section (in gauge eigenstates)
54 /134
(tree-level)
[GeV]
[fb]
Five types of signatures from Neutralino-Chargino production
55 /134
; then?
Z-unlike
but Z-like leptons
Five types of signatures from Neutralino-Chargino production
56 /134
; then?
Five types of signatures from Neutralino-Chargino production
57 /134
; then?
(some may be soft)
Muon g−2 vs LHC (1) 3-lepton signature
58 /134
pMSSM w. -decoupled.
also decoupled.
Endo, Hamaguchi, SI, Yoshinaga [1303.4256]
8TeV, 13.0/fb ATL-CONF-2012-154
Muon g−2 vs LHC (1) 3-lepton signature
59 /134
Endo, Hamaguchi, SI, Yoshinaga [1303.4256]
8TeV, 13.0/fb ATL-CONF-2012-154
pMSSM w. -decoupled.
also decoupled.
Muon g−2 vs LHC (1) 3-lepton signature : LHC Run 2
60 /134
Warning Assumptions for model simplification! Crosssection is for !! Read the papers!
Muon g−2 vs LHC (1) 3-lepton signature : LHC Run 2
61 /134
Warning Assumptions for model simplification! Crosssection is for !! Read the papers!
Muon g−2 vs LHC (1) 3-lepton signature : LHC Run 2
62 /134
Warning Assumptions for model simplification! Crosssection is for !! Read the papers!
Muon g−2 vs LHC (1) 3-lepton signature : CMS degenerate at Run 1
63 /134
ISR + 2-lepton [1512.08002] VBF + 2-lepton [1508.07628]
Outline
1)
2) LLCP
3) more exotic
64 /134
“SUSY” filter
Outline
1)
2) LLCP
3) more exotic
65 /134
“SUSY” filter
SUSY contribution to muon g−2 : gauge basis
66 /134
“mass insertion”
SUSY contribution to muon g−2 : gauge basis
67 /134
Muon g−2 vs LHC (1) 3-lepton signature coming from Wino-Higgsino contribution
68 /134
Wino contributions [red+blue; tree; slep=sneu]
Muon g−2 vs LHC (2) Pure-bino contribution results in slepton pair-production
69 /134
from
μ tanβ has upper bounds:
Endo, Hamaguchi, Kitahara, Yoshinaga [1309.3065]
Muon g−2 vs LHC (2) Pure-bino contribution results in slepton pair-production
70 /134
from
μ tanβ has upper bounds:
Endo, Hamaguchi, Kitahara, Yoshinaga [1309.3065]
Muon g−2 vs LHC (2) Pure-bino contribution results in slepton pair-production
71 /134
[1403.5294]
Muon g−2 vs LHC (2) Pure-bino contribution results in slepton pair-production
72 /134
Outline
1)
2) LLCP
3) more exotic
73 /134
“SUSY” filter
Outline
1)
2) LLCP
3) more exotic
74 /134
“SUSY” filter
One more comment…
75 /134
Ready for single-quark observation!
LLCP
1. Motivations
2. How to detect?
3. Current and future
Motivations for LLCP
77 /134
DM relic abundance (esp. to ameliorate DM over-abundance)
co-annihilation
super-WIMP scenario
Li problem
MSSM with
active in the early Universe cosmological motivations
Sato, Shimomura, Yamanaka [1604.04769]
next slides
LLCP signature charged (quasi-) stable particles
DM as a thermal relic
78 /134
Early Universe with
thermal equilibrium pair creation pair annihilation
DM as a thermal relic
79 /134
Early Universe with
thermal equilibrium pair creation pair annihilation
DM as a thermal relic
80 /134
Early Universe with
pair creation pair annihilation
far apart due to • pair annihilation • Universe’s expansion
“thermal relic”
DM as a thermal relic : overabundance
81 /134
“observed” relic density
“proper” crosssection of (DM)(DM)SM
Figure from Gelmini and Gondolo, 1009.3690
DM as a thermal relic : overabundance
82 /134
“observed” relic density
“proper” crosssection of (DM)(DM)SM
Sometimes overabundant :
e.g. MSSM with -DM 100 GeV overabundant
mechanisms for
co-annihilation Binetruy, Girardi, Salati (1984), Griest, Seckel (1991)
super-WIMP Feng, Rajaraman, Takayama [ph/0306024]
MSSM4G Abdullah, Feng [1510.06089]
and a lot more…
Co-annihilation scenario
83 /134
Co-annihilation
extra process
small mass splitting LLCP
Co-annihilation scenario
84 /134
Co-annihilation
Bino-stau 700 GeV
Bino-Wino 3 TeV
Bino-gluino 7-8 TeV
Bino-stop ~8 TeV
cf. [1403.0715], [1404.5571], etc.
late-time decay
Super-WIMP scenario
85 /134
Super-WIMP
slepton as thermal relic with
gravitino
NLSP
LSP (DM)
Super-WIMP scenario
86 /134
SM
SM
LLCP ( as a working example)
1. Motivations
2. How to detect?
3. Current and future
ATLAS detector
88 /134
p p
ATLAS detector
89 /134
p p
ATLAS detector
90 /134
p p
0 1 2 3 4 5 10 [m]
inner detectors (trackers)
calorimeters muon spectrometer
hadron
Ecal Hcal
light
heavy
91 /134
“Mass measurement” to distinguish long-lived sleptons
92 /134
mass measurement = p & β measurements
momentum & velocity
momentum velocity
• TOF [time-of-flight]
• dE/dx [ionization energy loss]
“Mass measurement” to distinguish long-lived sleptons
93 /134
mass measurement = p & β measurements
momentum & velocity
momentum ATLAS: muon β resolution
velocity
• TOF [time-of-flight]
• dE/dx [ionization energy loss]
LLCP ( as a working example)
1. Motivations
2. How to detect?
3. Current and future
Latest limits
95 /134
360 GeV [CMS]
[CMS-PAS-EXO-16-036]
286 GeV [ATLAS] [1411.6795]
See also: LHCb-CONF-2014-001
For
(direct production)
14 TeV LHC expectation
96 /134
Detector
similar to ATLAS/CMS
β-resolution same as ATLAS (resolution: 2.4%)
Signal: Madgraph5 + Pythia6 + Delphes3 (calculated at the LO)
BKG: “Snowmass 2013” BKG set for 14 TeV (publicly available)
Pile-up not considered
Feng, SI, Shadmi, Tarem [1505.02996]
-selection flow
Event selection
14 TeV LHC expectation
97 /134
14 TeV LHC expectation
98 /134
14 TeV LHC prospects are also studied in [1106.0764] & [1203.1581] by J. Heisig and J. Kersten.
LLCP ( as a working example)
1. Motivations
2. How to detect?
3. Current and future and more
0 1 2 3 4 5 10 [m]
inner detectors (trackers)
calorimeters muon spectrometer
hadron
Ecal Hcal
light
heavy
100 /134
Figure from Groom, Mokhov, Striganov, Atom. Nucl. Data Tab. 78 (2001) 183-356 [also in PDG Review “Passage of particles through matter”]
Muon energy loss in matter
101 /134
Figure from Groom, Mokhov, Striganov, Atom. Nucl. Data Tab. 78 (2001) 183-356 [also in PDG Review “Passage of particles through matter”]
Muon energy loss in matter
102 /134
Bremsstrahlung
Photonuclear interaction
pair-production
Muon radiative energy loss
Muon energy loss in 3m iron (Fe) “calorimeter”
103 /134
Feng, SI, Shadmi, Tarem [1505.02996]
[Simulated with GEANT 4]
Assumptions
104 /134
Detector
similar to ATLAS/CMS
β-resolution same as ATLAS (resolution: 2.4%)
Signal: Madgraph5 + Pythia6 + Delphes3 (calculated at the LO)
BKG: “Snowmass 2013” BKG set for 100TeV (publicly available)
Pile-up not considered
Feng, SI, Shadmi, Tarem [1505.02996]
-selection flow
Event selection
Result: cut flow
105 /134
-selection flow
Event selection
LLCP selection flow
Event categorization
SR
Feng, SI, Shadmi, Tarem [1505.02996]
signal SM BKG
SR
signal SM BKG
LLCP selection flow
Event categorization
Result: cut flow
106 /134
-selection flow
Event selection
Eloss reduces 34% of BKG
Feng, SI, Shadmi, Tarem [1505.02996]
Result: Expected exclusion limit
107 /134
Feng, SI, Shadmi, Tarem [1505.02996]
Result: Expected exclusion limit
108 /134
mixing-angle dependence
Feng, SI, Shadmi, Tarem [1505.02996]
The mass resolution is very bad?
109 /134
Implication to Cosmology
110 /134
will covered @ LHC
Outline
1)
2) LLCP
3) more exotic
111 /134
“SUSY” filter
co-annihilation in coming years!
(R-hadron, displaced vertex, disappearing track, …)
(ph/0511034, 1403.0715, 1409.4533,1504.00504, 1506.08206, ...)
“Exotic” searches by ATLAS + CMS
112 /134
“Exotic” searches by ATLAS + CMS
113 /134
List of 13 TeV EXO results (ATLAS-EXO, CMS-EXO, CMS-B2G)
DM searches
Resonances
LLCP and new signature
“new phenomena” (signature based)
OTHERS
“Exotic” searches by ATLAS + CMS
114 /134
“others” ?
black holes
doubly-charged Higgs
strong gravity
TeV-scale gravity signatures
excited leptons / quarks
four-top-quark production
composite Majorana neutrinos
quark contact interactions & extra dim
type-III seesaw fermion
pair-produced Higgs
pair-produced resonances in four jets
pair-produced first- / second-generation scalar LQ
right-handed W and third-generation scalar LQ
right-handed nu and third-generation scalar LQ
vector-like quarks (pair-production) (single-production)
“Exotic” searches by ATLAS + CMS
115 /134
“others” ?
black holes
doubly-charged Higgs
strong gravity
TeV-scale gravity signatures
excited leptons / quarks
four-top-quark production
composite Majorana neutrinos
quark contact interactions & extra dim
type-III seesaw fermion
pair-produced Higgs
pair-produced resonances in four jets
pair-produced first- / second-generation scalar LQ
right-handed W and third-generation scalar LQ
right-handed nu and third-generation scalar LQ
vector-like quarks (pair-production) (single-production)
Extending (MS)SM with vector-like fermions
116 /134
SM + vector-like fermions:
MSSM + vector-like fermions
no gauge anomaly
consistent w. EWPT & Higgs data (unlike chiral 4th gen)
one Dirac fermion “vector-like fermion”
QUE model : MSSM +
gauge coupling unification
SU(5) GUT
extra interaction mh
QDEE model : MSSM +
gauge coupling unification
SU(5) GUT
extra coupling mh slightly
Vector-like fermions : motivations in MSSM
117 /134
MSSM + VLF
2 models for coupling unification
(you can also append pairs)
Vector-like fermions : motivations in MSSM
118 /134
Gauge coupling unification
measured theoretical prediction
Vector-like fermions : motivations in MSSM
119 /134
Gauge coupling unification
measured theoretical prediction
Vector-like fermions : motivations in MSSM
120 /134
MSSM + VLF
2 models for coupling unification
QUE model : MSSM +
gauge coupling unification
SU(5) GUT
extra interaction mh
QDEE model : MSSM +
gauge coupling unification
SU(5) GUT
extra coupling mh slightly
SUSY scale can be lowered. (but still unnatural because μ is enhanced.)
Vector-like quark search
121 /134
(otherwise stable VLQ)
depending on mixing btw. vec-like/SM quarks.
(usually 3rd gen is chosen to avoid flavor constraints)
multi b-quark signature with BR dependence
(QUE model)
Vector-like quark search
122 /134
(otherwise stable VLQ)
depending on mixing btw. vec-like/SM quarks.
(usually 3rd gen is chosen to avoid flavor constraints)
multi b-quark signature with BR dependence
(QUE model)
Vector-like quark search (Run 1 summary + Run 2 ATL-CONF-2016-101)
123 /134
Vector-like quark search (Run 1 summary + Run 2 ATL-CONF-2016-101)
124 /134
Outline
1)
2) LLCP
3) more exotic
125 /134
“SUSY” filter
co-annihilation in coming years!
(R-hadron, displaced vertex, disappearing track, …)
(ph/0511034, 1403.0715, 1409.4533,1504.00504, 1506.08206, ...)
many more searches…
VLQ
VLL
QUE model : MSSM +
gauge coupling unification
SU(5) GUT
extra interaction mh
QDEE model : MSSM +
gauge coupling unification
SU(5) GUT
extra coupling mh slightly
Vector-like fermions : motivations in MSSM
126 /134
MSSM + VLF
2 models for coupling unification
(you can also append pairs)
VLL as a solution of overabundance : MSSM4G
127 /134
pure-Bino DM with 100 GeV overabundant
extra annihilation channel larger “proper”
if
VLL as a solution of overabundance : MSSM4G
128 /134
pure-Bino DM with 100 GeV overabundant
if
Vector-like quark search
129 /134
(otherwise stable VLL)
depending on mixing btw. vec-like/SM leptons.
(flavor constraints are not strict)
multi lepton signature dependent on ratio
(QUE model)
BR fixed but ratio not fixed
VLL search prospects at 14 TeV LHC
130 /134
IF
LHC constraints!
IF
No constraints from LHC or HL-LHC.
This scenario will be perfectly searched by CTA gamma-ray observation.
VLL search prospects at 14 TeV LHC
131 /134
IF
Snowmass BKG set is used.
MG5–Pythia–Delphes + NLO K-factor
di-boson + tt dominated
Signal by FR–MG5aMC–Pythia–Delphes (LO)
SR dedicated for WZ / ZZ + leptons
3L, 4L for WZ, and 4L, 5L for ZZ
tau-tag / b-tag not used (avoided)
Uncertainties = stat. + 20% syst.
VLL mass [GeV]200 250 300 350 400 450 500
cros
s sec
tion
[fb]
10
210 at 300fbexp
UL;95%σ
at 1000fbexpUL;95%σ
at 3000fbexpUL;95%σ
LO cross section (QUE)
LO cross section (QDEE)
14 TeV LHC exclusione-mixed VLL
0.3ab 1ab 3ab (with 1&2σ band)
Collider prospects summary
132 /134
LHC insensitive, but CTA covers full region
ℓ ( )
-
-
-
ℓ~ [ ]
~[
]ℓ ( )
-
-
-
ℓ~ [ ]
~[
]
QUE QDEE
VLL as a solution of overabundance : MSSM4G
133 /134
LHC insensitive, but CTA covers full region
ℓ ( )
-
-
-
ℓ~ [ ]
~[
]ℓ ( )
-
-
-
ℓ~ [ ]
~[
]
QUE QDEE
CTA CTA
Outline
1)
2) LLCP
3) more exotic
134 /134
“SUSY” filter
co-annihilation in coming years!
(R-hadron, displaced vertex, disappearing track, …)
(ph/0511034, 1403.0715, 1409.4533,1504.00504, 1506.08206, ...)
many more searches…
VLQ
VLL
Recommended