Searches for Neutral 2HDM, MSSM and NMSSMHiggs Bosons at the LHC
The Third Annual Large Hadron Collider Physics ConferenceSt. Petersburg
Matthias Schroder (KIT)on behalf of the ATLAS and CMS Collaborations
September 4, 2015
Matthias Schroder ([email protected]) September 4, 2015 1 / 22
Introduction
First New Particle at the LHC: First Sign of New Physics?
1) What are the properties of thenew boson?
I Couplings compatible withSM expectation
I But room for BSM behaviour
2) Here: Is it part of an extendedHiggs sector?
I Constraint: BSM modelsmust contain a SM-like Higgsboson at 125 GeV
AT
LA
S-C
ON
F-2
01
5-0
44
,C
MS
-PA
S-H
IG-1
5-0
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→ Direct searches for additional Higgs bosons!
Matthias Schroder ([email protected]) September 4, 2015 2 / 22
Introduction
Models with Extended Higgs SectorsSupersymmetry
Minimal supersymmetric extension MSSMI 2 Higgs doublets → 5 physical bosons
F h, H, A ≡ Φ (neutral), H+, H− (charged)
I 2 tree-level parameters mA and tanβ = vevu/vevd
F Other SUSY parameters enter via radiativecorrections, fixed in benchmark scenarios
I Data: preference for h being the 125 GeV state
Next-to-MSSM NMSSMI 1 additional Higgs singlet → 7 bosons
Generic 2-Higgs-Doublet Models 2HDM
previous presentation
by Eduard Boos
Effective extension of Standard Model adding a Higgs doubletI 5 parameters (no FCNC, mh = 125 GeV):
mA, mH, mH± , tanβ, α = h-H mixing
Different types depending on coupling structureI Type II: u- and d-type fermions couple to different doublets (MSSM)
Matthias Schroder ([email protected]) September 4, 2015 3 / 22
Introduction
Numerous Neutral-BSM-Higgs-Boson Searches at the LHC
Outline: will present a few recent results
Further NEW results with 2HDM interpretation:
- Heavy H→ ZZ search at ATLAS arXiv:1507.05930 (submitted to Eur. Phys. J.)
see High mass searches for SM like Higgs bosons at the LHC by Song-Ming Wang
- H→ hh→ bbττ search at CMS, CMS-HIG-14-034
see Searches for HH processes at LHC by Andrea Rizzi
Matthias Schroder ([email protected]) September 4, 2015 4 / 22
Introduction
Numerous Neutral-BSM-Higgs-Boson Searches at the LHC
Outline: will present a few recent results
Further NEW results with 2HDM interpretation:
- Heavy H→ ZZ search at ATLAS arXiv:1507.05930 (submitted to Eur. Phys. J.)
see High mass searches for SM like Higgs bosons at the LHC by Song-Ming Wang
- H→ hh→ bbττ search at CMS, CMS-HIG-14-034
see Searches for HH processes at LHC by Andrea Rizzi
Matthias Schroder ([email protected]) September 4, 2015 4 / 22
Pseudoscalar A→ Z + h(125) Phys. Lett. B 744 (2015) 163-183, Phys. Lett. B 748 (2015) 221
Pseudoscalar A→ Z + h(125) Search at ATLAS & CMS
Most 2HDMs: A predominantlyproduced by gluon-gluon fusion
Often large B(A→ Z + h) formh + mZ . mA . 2mt
I MSSM: in low-tanβ regionI Can be important also above
2mt in general 2HDMs0.01
0.1
1
140 200 300 400 500
BR(A
)
MA [GeV]
tanβ = 2.5
Mh = 126 GeV
A → tt
A → bbA → hZA → ττ
MSSM tanβ = 2.5
A.
Djo
ua
di,
J.Q
uevillo
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P1
31
0(2
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3)
02
8
Matthias Schroder ([email protected]) September 4, 2015 5 / 22
Pseudoscalar A→ Z + h(125) Phys. Lett. B 744 (2015) 163-183, Phys. Lett. B 748 (2015) 221
Pseudoscalar A→ Z + h(125) Search at ATLAS & CMSZ→ ll/νν clean signature
I νν: ATLAS only
B(h→ bb/ττ) typically largeI ττ CMS: CMS-HIG-14-034
mh = 125 GeV constraintdeployed to improve resolution
S/(S
+B) w
eigh
ted
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bZ+btt, t
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= 400 GeVAm= 500 GeVAm= 600 GeVAm
)µ(ℓ = e, (8 TeV)-1L = 19.7 fb
CMSb ℓℓb→ Zh →A
High mass
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Peak search in invariant mass (llbb/ττ) and transverse (ννbb) mass
Matthias Schroder ([email protected]) September 4, 2015 6 / 22
Pseudoscalar A→ Z + h(125) Phys. Lett. B 744 (2015) 163-183, Phys. Lett. B 748 (2015) 221
2HDM Interpretation
Exclusion limits in type-II 2HDM, mA = mH = mH± = 300 GeV
)α-βcos(
-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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ATLAS = 8 TeVs
-120.3 fb
=300 GeVAZh m→A2HDM Type II
Obs 95% CL bandσ1±Exp 95% CL bandσ2±Excluded ττ→by A
)α-βcos(
-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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Type-II 2HDM
bℓℓb→Zh→A
= 300 GeVAm
(8 TeV)-1L = 19.7 fb
CMS
95% CL limitsObservedExcluded regionExpected
σ 1±Expectedσ 2±Expected
–
Large parts of type-II parameter-space excluded, also at high tanβ
Matthias Schroder ([email protected]) September 4, 2015 7 / 22
H/A→ Z + A/H CMS-PAS-HIG-15-001
NEW H/A→ Z(ll) + A/H(bb/ττ) at CMS
More general approach: no specific h(125) requirement in final state
Type-II 2HDM interpretation
Either mass hierarchymA > mH or mH > mA
Complementary informationto A→ Zh(125) searches )α-βcos(
-1 -0.5 0 0.5 1
βta
n
-110
1
10CMS Preliminary (8 TeV)-119.8 fb
= 150 GeVAM = 350 GeVHM
2HDM type-II
Obs. Excl.Exp. Excl.
1-sigma
2-sigma
H→ ZA→ llbb
Access to ‘alignment’ region at cos(β − α) ≈ 0
Matthias Schroder ([email protected]) September 4, 2015 8 / 22
MSSM Neutral Higgs-Boson Searches
MSSM Neutral Higgs-Boson Searches
small tanβ
h,H,At, t
g
g
b, b
gg-fusion production→ no b-tagged jet
larger tanβ
h,H,A
b
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g
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b-assoc. production→ ≥ 1 b-tagged jets
100 200 300 400 500 600
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(H)
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BR(H -> WW)
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igg
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max, tanβ = 50
B(H→ bb)
B(H→ ττ)
B(H→ µµ)
tanβ = 50
Φ→ bb channel
Very large BChallenging bkg
Φ→ ττ channel
Relatively large BManageable bkg
Φ→ µµ channel
Tiny BExcellent massresolution
Matthias Schroder ([email protected]) September 4, 2015 9 / 22
MSSM Φ→ ττ Searches
Φ→ ττ Searches: mττ ReconstructionLikelihood approachCMS (ATLAS similar)
Typical resolution of 20%
Total transverse massATLAS in τhτh channel
mT(τ1, τ2)⊕mT(τ1, /ET)⊕mT(τ2, /ET)
Improved separation of signaland QCD-multijet bkg
[GeV]ττm0 50 100 150 200 250 300 350 400 450
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GeV
]ττ
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= 120 GeVA mττ →A = 200 GeVA mττ →A = 300 GeVA mττ →A
= 8 TeVsCMS Simulation hτµ
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Data 2012=30β=350, tanAm
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+ jetsντ→W & single toptt
OthersBkg. uncertainty
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trigger categoryhadτhadτhadτhadτ→h/H/A
J.H
igh
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ergy
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ys.1
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Matthias Schroder ([email protected]) September 4, 2015 10 / 22
MSSM Φ→ ττ Searches
Φ→ ττ Search at ATLAS
Channels: eµ, eτh, µτh, τhτh
Event categories based onI Number of b-tagged jetsI Low/high-mass specific selectionI Used triggers
Background composition dependson channel and category
Major contributions measuredfrom data
I Similar techniquesby ATLAS and CMS
[GeV]MMCττm
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vent
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=20β=150, tanAmττ→Z
µµee/→Z & single toptt
W+jets & dibosonMultijetBkg. uncertainty
ATLAS , -1L dt = 20.3 fb∫ = 8 TeV, s
tag categoryhadτlepτ→h/H/A
� Z→ ττ : embedding method in Z→ µµ data
� QCD multijets: control sample with inverted τh-identification criteria
Matthias Schroder ([email protected]) September 4, 2015 11 / 22
MSSM Φ→ ττ Searches J. High Energy Phys. 11 (2014) 056, CMS-PAS-HIG-14-029
Φ→ ττ Results
[GeV]Am100 200 300 400 500 600 700 800 900 1000
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= 126 GeVhm
= 126.2 GeVhm
Obs 95% CL limitExp 95% CL limit
σ1 σ2
Obs 95% CL limit
theoryσ 1 ±
-1 L dt = 19.5 - 20.3 fb∫=8 TeV, s ATLAS
ττ → h/H/A = 1 TeV,SUSY
scenario, Mmod+hMSSM m
[GeV]Am200 400 600 800 1000
βta
n
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(MSSM,SM)<0.05:SCL
Observed
Expected
Expectedσ 1±
scenariomod+hMSSM m
3 GeV± 125≠ hMSSMm
(7 TeV)-1 (8 TeV) + 4.9 fb-1, 19.7 fbττ→ Preliminary, h,H,ACMS
NEW
Exclusion limits on tanβ in MSSM mmod+h benchmark scenario
Exclusion of tanβ & 5 at low mA, sensitivity up to 1 TeV
Low tanβ region incompatible with mh = 125 GeV
Exclusion of low-mA . 200 GeV region in mmod+h scenario
Matthias Schroder ([email protected]) September 4, 2015 12 / 22
MSSM Φ→ bb Search CMS-PAS-HIG-14-017 (submitted to J. High Energy Phys.)
NEW Φ→ bb Search at CMS
For not-too-small tanβI Dominant bbΦ productionI Large B(Φ→ bb) ≈ 90%
Selection: ≥ 3 b-tagged jets
Peak search in invariant massdistribution M12 of leading two jets
Huge QCD-multijet backgroundI Largely reduced by 3 b-tag
requirement
Requires dedicated triggers withonline b-tagging
φ
g b
g b
b
b
M12
[GeV]12M0 100 200 300 400 500 600 700 800
a.u.
/ G
eV
0.0
0.2
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0.8
1.0
1.2
CMS Simulation (8 TeV)
= 200 GeVφm = 350 GeVφm = 500 GeVφm
Matthias Schroder ([email protected]) September 4, 2015 13 / 22
MSSM Φ→ bb Search CMS-PAS-HIG-14-017 (submitted to J. High Energy Phys.)
Data-Driven Background Model
Template for each flavour combination from 2 b-tag dataI Weighted by b-tag probability of un-tagged jet
Additional separation by condensed event b-tag estimator X123
I Based on secondary-vertex masses of 3 leading jets
[GeV]12M0 100 200 300 400 500 600 700 800
a.u.
/ G
eV
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(B2+B1+C2,b)b(C1,b)b(Q,b)bbb(B2+B1+C2)bb(C1+Q)
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a.u.
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(B2+B1+C2,b)b(C1,b)b(Q,b)bbb(B2+B1+C2)bb(C1+Q)
2D (M12,X123) background (+signal) templates fit to data
Matthias Schroder ([email protected]) September 4, 2015 14 / 22
MSSM Φ→ bb Search CMS-PAS-HIG-14-017 (submitted to J. High Energy Phys.)
Background-Only Fit ResultsProjection on M12 and X123
1/G
eV12
dN/d
M
0
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400
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600 Data(B2+B1+C2,b)b(C1,b)b(Q,b)bbb(B2+B1+C2)bb(C1+Q)Pre-fit bin-by-bin unc.
= 30)β= 350 GeV, tanA
(mφ bb×10
(8 TeV)-1CMS, 19.7 fb
[GeV]12M
0 100 200 300 400 500 600 700 800 900 1000
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a/B
kg
0.951.001.05
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25000Data(B2+B1+C2,b)b(C1,b)b(Q,b)bbb(B2+B1+C2)bb(C1+Q)Pre-fit bin-by-bin unc.
= 30)β= 350 GeV, tanA
(mφ bb×10
(8 TeV)-1CMS, 19.7 fb
123X
0 1 2 3 4 5 6 7 8D
ata/
Bkg
0.951.001.05
Background dominated by processes with 3 b-jets (�+� ≈ 80%)
Data well described by background-only hypothesis
Matthias Schroder ([email protected]) September 4, 2015 15 / 22
MSSM Φ→ bb Search CMS-PAS-HIG-14-017 (submitted to J. High Energy Phys.)
MSSM InterpretationExclusion limits on tanβ in MSSM mmod+
h benchmark scenario
[GeV]Am
100 150 200 250 300 350 400 450 500
βta
n
10
20
30
40
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60 (7 TeV)-1 (8 TeV) + 4.9 fb-1CMS, 19.7 fb
95% CL limitExpected
expectedσ1± expectedσ2±
Observed
scenariohmod+m = +200 GeVµ
3 GeV± 125≠ h,Hm
[GeV]µ-500 -400 -300 -200 -100 0 100 200 300 400 500
βta
n
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60 (7 TeV)-1 (8 TeV) + 4.9 fb-1CMS, 19.7 fb
95% CL limit = 200 GeVAmExpected = 350 GeVAm
Observed = 500 GeVAm
scenariohmod+m
Upper limits on tanβ from 14–50
Also dependence on Higgsino-mass parameter µ studiedI Good sensitivity expected in this channel [Eur. Phys. J. C73 (2013) 2552]
Matthias Schroder ([email protected]) September 4, 2015 16 / 22
MSSM Φ→ µµ Search CMS-PAS-HIG-13-024 (submitted to Phys. Lett. B)
NEW Φ→ µµ Search at CMS
Very low expected BBut excellent mass resolution
I ∆m = 1.2 GeV at 125 GeV
Analytic signal+bkg model
Eve
nts
/ 2 G
eV
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50
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= 30β = 150 GeV tan Am
(8 TeV)-119.3 fbCMS Simulation
(GeV)-µ+µm100 150 200 250 300
Pul
l
2−1−012
SM-like h
enhanced H+A
tanβ = 30
Similar search by ATLAS using 7 TeV dataJ. High Energy Phys. 02 (2013) 095
(GeV)-µ+µm
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510
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tt-W+W
Z±WZZDrell-Yan
=30β=150 GeV, tanA
Signal, m
(8 TeV)-119.3 fbCMS
Peak search in mµµ distributionI Dominant bkg contribution
from Drell-Yan production
Data well-described bybackground-only model
Matthias Schroder ([email protected]) September 4, 2015 17 / 22
MSSM Φ→ µµ Search CMS-PAS-HIG-13-024 (submitted to Phys. Lett. B)
MSSM InterpretationExclusion limits on tanβ in MSSM mmod+
h benchmark scenario
[GeV]Am
100 150 200 250 300 350 400 450 500
βta
n
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30
40
50
60 (7 TeV)-1 (8 TeV) + 4.9-5.1 fb-1CMS (unpublished), 19.3-19.7 fb
95% CL limitExpectedObserved
bb→φ-µ+µ→φ
-τ+τ→φ
scenariohmod+m = +200 GeVµ
CM
S-P
AS
-HIG
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7(su
pp
lemen
tal
ma
terial)
A→ Z + h
==
==
H±
sear
ches
==
==
next presentation
by Pietro Vischia
Results from different channels complementing each otherI Different mass resolution clearly visible (best for µµ, worst for ττ)I Most stringent limits from ττ channel, bb and µµ similar to each other
Matthias Schroder ([email protected]) September 4, 2015 18 / 22
MSSM Φ→ µµ Search CMS-PAS-HIG-13-024 (submitted to Phys. Lett. B)
MSSM InterpretationExclusion limits on tanβ in MSSM mmod+
h benchmark scenario
[GeV]Am
100 150 200 250 300 350 400 450 500
βta
n
10
20
30
40
50
60 (7 TeV)-1 (8 TeV) + 4.9-5.1 fb-1CMS (unpublished), 19.3-19.7 fb
95% CL limitExpectedObserved
bb→φ-µ+µ→φ
-τ+τ→φ
scenariohmod+m = +200 GeVµ
CM
S-P
AS
-HIG
-14
-01
7(su
pp
lemen
tal
ma
terial)
A→ Z + h
==
==
H±
sear
ches
==
==
next presentation
by Pietro Vischia
Results from different channels complementing each otherI Different mass resolution clearly visible (best for µµ, worst for ττ)I Most stringent limits from ττ channel, bb and µµ similar to each other
Matthias Schroder ([email protected]) September 4, 2015 18 / 22
NMSSM h(125)→ aa→ µµττ Search arXiv:1505.01609 (submitted to Phys. Rev. D)
NEW NMSSM h(125)→ aa→ µµττ Search at ATLAS
Low expected B(a→ µµ)
But high trigger efficiency andnarrow di-µ resonance
Peak search in mµµ distributionfrom 3.7–50 GeV
Analytic signal + bkg modelI AssumingB(a→ µµ) + B(a→ ττ) = 1 [GeV]µµm
3 3.5 4 4.5 5 5.5
% R
esid
ual
100
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100~~
Eve
nt
/ 5
0 M
eV
1
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Event
/ 50 M
eV
50
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300
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Signal MC
Best Fit
Syst.σ 1±Fit
= 125 GeVh = mH
= 5 GeV, ma
, mµSR
ATLAS Simulation
= 8 TeVs
ma = 5 GeV
Matthias Schroder ([email protected]) September 4, 2015 19 / 22
NMSSM h(125)→ aa→ µµττ Search arXiv:1505.01609 (submitted to Phys. Rev. D)
Results
Eve
nts
/ 200
MeV
[GeV]µµm4 5 6 7 8 910 20 30 40 50 60%
Res
idua
l
-1000
100
5
10
15
ATLAS-1 = 8 TeV, 20.3 fbs
µSR Data
Background Model
Fit Uncertainty
* ComponentγZ/
Componenttt
*γZ/
tt
Other
aa) = 10 %BR(h
[GeV]am4 5 6 7 8 9 10 20 30 40
2 )ττ→
BR
(a×
aa)
→
BR
(h×
SM
σ h
)→
(gg
σ
-210
-110
1
10
210 = 125 GeVh = mHmObserved 95% CLMedian Expected 95% CL
σ 1 ± σ 2 ±
ATLAS-1 = 8 TeV, 20.3 fbs
Data well-described by background-only modelI J/Ψ,Ψ′,Υ1S ,Υ2S ,Υ3S ,Z resonances + tt + Drell-Yan continuum
Exclusion limit on σ(gg → h)× B(h→ aa)I Relative to SM gluon-gluon-fusion Higgs-boson production
Matthias Schroder ([email protected]) September 4, 2015 20 / 22
NMSSM h(125)→ aa→ 4γ Search ATLAS EXOT-2013-24
NEW NMSSM h(125)→ aa→ 4γ Search at ATLAS
Events with ≥ 3 identifiedphotons
Peak search in mγ2γ3 distribution
mh = 125 GeV
Exclusion limit on σ/σSM(gg → h)× B(h→ aa)× B2(a→ γγ)
Additional H→ aa interpretation
Matthias Schroder ([email protected]) September 4, 2015 21 / 22
Summary & Outlook
Are there any further Higgs bosons?
Many complementary searcheswith LHC Run-I data
Both model-independent limits andmodel-dependent interpretations
Significantly improved constraints on‘BSM-Higgs parameter space’, e. g.
I closing low mA-region in MSSM
?
−→ We don’t know yet. . .
. . . but 13 TeV data aheadWe might know soon!
[GeV]φm100 200 300 400 1000
[p
b]
)ττ→φ(
B⋅)φ(g
gσ
95%
CL
lim
it o
n
-410
-310
-210
-110
1
10
210
310
ττ→φ Projection CMS
Expected 13TeV, 300/fb
Expectedσ 1±
Expectedσ 2±
arXiv:1408.3316 expected
(8 TeV scaled to 13 TeV, 20/fb)
=125 GeV, 13 TeV)H
(mSM h→gg
13 TeV
J.H
igh
En
ergy
Ph
ys.1
0(2
01
4)
16
0
(sup
plem
enta
lm
ateria
l)
Matthias Schroder ([email protected]) September 4, 2015 22 / 22
Summary & Outlook
Are there any further Higgs bosons?
Many complementary searcheswith LHC Run-I data
Both model-independent limits andmodel-dependent interpretations
Significantly improved constraints on‘BSM-Higgs parameter space’, e. g.
I closing low mA-region in MSSM
?
−→ We don’t know yet. . .
. . . but 13 TeV data aheadWe might know soon!
[GeV]φm100 200 300 400 1000
[p
b]
)ττ→φ(
B⋅)φ(g
gσ
95%
CL
limit
on
-410
-310
-210
-110
1
10
210
310
ττ→φ Projection CMS
Expected 13TeV, 300/fb
Expectedσ 1±
Expectedσ 2±
arXiv:1408.3316 expected
(8 TeV scaled to 13 TeV, 20/fb)
=125 GeV, 13 TeV)H
(mSM h→gg
13 TeV
J.H
igh
En
ergy
Ph
ys.1
0(2
01
4)
16
0
(sup
plem
enta
lm
ateria
l)
Matthias Schroder ([email protected]) September 4, 2015 22 / 22
Additional Material
Additional Material
Matthias Schroder ([email protected]) September 4, 2015 23 / 22
Additional Material MSSM
Neutral MSSM Higgs-Boson Masses in mmaxh Scenario
CMS-PAS-HIG-12-011
]2[GeV/c0Am100 150 200 250 300 350
]2
[GeV/c
0/H
0h
m
100
150
200
250
300
350
±Hm
= 10)β (tanhm
= 50)β (tanhm
= 20)β (tan
hm
= 10)
β (t
an
Hm
= 20)
β (t
an
Hm
= 50)
β (t
an
Hm
-scenariomaxhMSSM m
Matthias Schroder ([email protected]) September 4, 2015 24 / 22
Additional Material 2HDM
Types of 2HDM
Branco et al. Theory and phenomenology of two-Higgs-doublet models, Physics Reports 516 (2012) 1-102
Matthias Schroder ([email protected]) September 4, 2015 25 / 22
Additional Material A→ Z + h(125)
A→ Z + h: Model-Independent Interpretation
Phys. Lett. B 744 (2015) 163-183
[GeV]A m
200 300 400 500 600 700 800 900 1000
) [p
b]ττ
→B
R(h
×Z
h)→
BR
(A×σ
-210
-110
1
Comb obs 95% CL limit
Comb exp 95% CL limit
bandσ 1±
bandσ 2±
exp 95% CL limithadτhadτ
exp 95% CL limithadτlepτ
exp 95% CL limitlepτlepτ
ATLAS
= 8 TeVs-120.3 fb
[GeV]A m
200 300 400 500 600 700 800 900 1000)
[pb]
b b
→B
R(h
×Z
h)→
BR
(A×σ
-210
-110
1
10
Comb obs 95% CL limit
Comb exp 95% CL limit
bandσ 1±
bandσ 2±
llbb exp 95% CL limit
bb exp 95% CL limitνν
ATLAS
= 8 TeVs-120.3 fb
Matthias Schroder ([email protected]) September 4, 2015 26 / 22
Additional Material A→ Z + h(125)
A→ Z + h: Model-Independent Interpretation
Phys. Lett. B 748 (2015) 221
[GeV]Am250 300 350 400 450 500 550 600
) [fb
]b
ℓℓb
→ Z
h →
B(A
Aσ
0.81
2
10
20
3040506070
Low Intermediate High mass region
95% CL limitsObservedExpected
σ 1±Expectedσ 2±Expected
(8 TeV)-1L = 19.7 fb
CMS
b ℓℓb→ Zh →A
[GeV]AΓ0 5 10 15 20 25 30 35 40
) [fb
]b
ℓℓb
→ Z
h →
B(A
Aσ
0.81
2
10
20
3040506070
95% CL limitsObservedExpected
σ 1±Expectedσ 2±Expected
(8 TeV)-1L = 19.7 fb
CMS
b ℓℓb→ Zh →A
= 500 GeVAm
Matthias Schroder ([email protected]) September 4, 2015 27 / 22
Additional Material A→ Z + h(125)
A→ Z + h: 2HDM Interpretation
Phys. Lett. B 744 (2015) 163-183
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Obs 95% CL bandσ1±Exp 95% CL bandσ2±Excluded ττ→by A
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ATLAS = 8 TeVs
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=300 GeVAZh m→A2HDM Type II
Obs 95% CL bandσ1±Exp 95% CL bandσ2±Excluded ττ→by A
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10
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-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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n
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ATLAS = 8 TeVs
-120.3 fb
=300 GeVAZh m→A2HDM Lepton-specific
Obs 95% CL bandσ1±Exp 95% CL bandσ2±Excluded ττ→by A
)α-βcos(
-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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n
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10
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-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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n
1
10
210
)α-βcos(
-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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n
1
10
210
)α-βcos(
-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
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n
1
10
210
ATLAS = 8 TeVs
-120.3 fb
=300 GeVAZh m→A2HDM Flipped
Obs 95% CL bandσ1±Exp 95% CL bandσ2±Excluded ττ→by A
)α-βcos(
-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
βta
n
1
10
210
Matthias Schroder ([email protected]) September 4, 2015 28 / 22
Additional Material A→ Z + h(125)
A→ Z + h: 2HDM Interpretation
Phys. Lett. B 748 (2015) 221
)αβcos(-1 -0.5 0 0.5 1
βta
n
-110
1
10
Type-I 2HDM
bℓℓb→Zh→A
= 300 GeVAm
(8 TeV)-1L = 19.7 fb
CMS 95% CL limitsObservedExcluded regionExpected
σ 1±Expectedσ 2±Expected
–
– )αβcos(-1 -0.5 0 0.5 1
βta
n
-110
1
10
Type-II 2HDM
bℓℓb→Zh→A
= 300 GeVAm
(8 TeV)-1L = 19.7 fb
CMS
95% CL limitsObservedExcluded regionExpected
σ 1±Expectedσ 2±Expected
–
Matthias Schroder ([email protected]) September 4, 2015 29 / 22
Additional Material H/A→ Z + A/H
H/A→ Z + A/H: 2HDM Interpretation
CMS-PAS-HIG-15-001
Z→ bb channel
(GeV)AM0 200 400 600 800 1000
(G
eV)
HM
0
100
200
300
400
500
600
700
800
900
1000
TH
σ /
95%
σ =
µ
Obs
erve
d
-110
1
10
210
310
410
510CMS Preliminary (8 TeV)-119.8 fb
2HDM type-II) = 0.01α - β) = 1.5 ; cos(βtan(
ZA→H
ZH
→A
)
= 0.
01α
-
β)
= 1.
5 ;
cos(
βta
n(
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ype-
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Kinem
atic
ally
forb
idden
Exp. Excl.Obs. Excl.
Z→ ττ channel (shape analysis)
(GeV)AM0 200 400 600 800 1000
(G
eV)
HM
0
100
200
300
400
500
600
700
800
900
1000CMS Preliminary (8 TeV)-119.8 fb
TH
σ/95
%σ
=
µO
bser
ved
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1
10
210
310
410
510
Exp. Excl.σ 1±Obs. Excl.
Kinem
atic
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forb
idden
ZA→H
ZH
→A
) = 0.01α - β) = 1.5 ; cos(βtan(2HDM type-II
) =
0.01
α -
β
) =
1.5
; co
s(β
tan
(2H
DM
typ
e-II
Matthias Schroder ([email protected]) September 4, 2015 30 / 22
Additional Material H/A→ Z + A/H
H/A→ Z + A/H: 2HDM Interpretation
CMS-PAS-HIG-15-001
Z→ bb channel
)α-βcos(-1 -0.5 0 0.5 1
βta
n
-110
1
10CMS Preliminary (8 TeV)-119.8 fb
= 150 GeVAM = 350 GeVHM
2HDM type-II
Obs. Excl.Exp. Excl.
1-sigma
2-sigma
Z→ ττ channel (shape analysis)
)α-βcos(-1 -0.5 0 0.5 1
βta
n
-110
1
10CMS Preliminary (8 TeV)-119.8 fb
2HDM type-IIττ ll→ ZA→H
= 150 GeVAM = 350 GeVHM
Obs. Excl.
Exp. Excl.
1-sigma
2-sigma
Matthias Schroder ([email protected]) September 4, 2015 31 / 22
Additional Material H→ ZZ
Search for Heavy H→ ZZ at ATLASarXiv:1507.05930 (submitted to Eur. Phys. J.)
4 channels: llll, llνν, llqq, qqνν
[GeV]Hm
200 300 400 500 600 700 800 9001000
ZZ
)[pb
]→
BR
(H×
ggF
σ95
% li
mit
on
-210
-110
1
10
expectedllll
expectedqqννllqq+ expectedννll
Combined expected
Combined observedσ1±σ2±
ATLAS -1 = 8 TeV, 20.3 fbs
ggF
qqνν+llqq+ννllll+ll→ZZ→H
[GeV]Hm
200 300 400 500 600 700 800 9001000
ZZ
)[pb
]→
BR
(H×
VB
Fσ
95%
lim
it on
-210
-110
1
10
expectedllll
expectedqqννllqq+ expectedννll
Combined expected
Combined observedσ1±σ2±
ATLAS -1 = 8 TeV, 20.3 fbs
VBF
qqνν+llqq+ννllll+ll→ZZ→H
Matthias Schroder ([email protected]) September 4, 2015 32 / 22
Additional Material H→ ZZ
Search for Heavy H→ ZZ: 2HDM Interpretation
arXiv:1507.05930 (submitted to Eur. Phys. J.)
)α-βcos (-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
βta
n
1
10
ATLAS
= 8 TeVs-120.3 fb
=200 GeVH
ZZ, m→H2HDM Type I
Obs 95% CL limit bandσ1±Exp 95% CL limit bandσ2±Excluded
)α-βcos (-0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8
βta
n
1
ATLAS
= 8 TeVs-120.3 fb
=200 GeVH
ZZ, m→H2HDM Type II
Obs 95% CL limit bandσ1±Exp 95% CL limit bandσ2±Excluded
Matthias Schroder ([email protected]) September 4, 2015 33 / 22
Additional Material Φ→ ττ
mττ Reconstruction at CMS
[GeV]vism0 50 100 150 200 250 300
[1/
GeV
]vi
sd
N/d
m
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2ττ →Z
= 120 GeVA mττ →A = 200 GeVA mττ →A = 300 GeVA mττ →A
= 8 TeVsCMS Simulation hτµ
[GeV]ττm0 50 100 150 200 250 300 350 400 450
[1/
GeV
]ττ
dN
/dm
0
0.05
0.1
0.15
0.2
0.25ττ →Z
= 120 GeVA mττ →A = 200 GeVA mττ →A = 300 GeVA mττ →A
= 8 TeVsCMS Simulation hτµ
Matthias Schroder ([email protected]) September 4, 2015 34 / 22
Additional Material Φ→ ττ
Updated Φ→ ττ Search at CMS
CMS-PAS-HIG-14-029
Channels: µµ, eµ, eτh, µτh, τhτh
Refinements over earlier results
1) MVA-based identification ofboosted τh
I Combines isolation and lifetimeinformation
I 40–50% reduction of fake rate
2) Further event categorizationI Depends on pT(τh)
[GeV]φm100 200 300 400 1000
BR
[p
b]
×)φ→
(gg
σ95
% C
L li
mit
on
-210
-110
1
10
210
310
φgg
(8 TeV)-1 19.7 fbττ→φ Preliminary CMSexpected
HIG-13-021HIG-14-029
OLD
NEW
20–50% improvement in expected sensitivity for most mass points
Matthias Schroder ([email protected]) September 4, 2015 35 / 22
Additional Material Φ→ ττ
Φ→ ττ : Model-Independent Results
J. High Energy Phys. 11 (2014) 056
[GeV]φm100 200 300 400 500 600 700 800 900 1000
) [p
b]ττ
→ φ B
R(
× σ
-310
-210
-110
1
10
210
310-1
L dt = 19.5 - 20.3 fb∫=8 TeV, sATLAS
gluon fusion ττ → φ
Obs 95% CL limitExp 95% CL limit
σ1 σ2
[GeV]φm100 200 300 400 500 600 700 800 900 1000
) [p
b]ττ
→ φ B
R(
× σ-310
-210
-110
1
10
210
310-1
L dt = 19.5 - 20.3 fb∫=8 TeV, sATLAS
b-associated production ττ → φ
Obs 95% CL limitExp 95% CL limit
σ1 σ2
Matthias Schroder ([email protected]) September 4, 2015 36 / 22
Additional Material Φ→ ττ
Φ→ ττ : Model-Independent Results
CMS-PAS-HIG-14-029
[GeV]φm100 200 300 400 1000
[p
b]
)ττ→φ(
B⋅)φ(g
gσ
95%
CL
lim
it o
n
-310
-210
-110
1
10
210
310
φgg
ObservedExpected
Expectedσ 1± Expectedσ 2±
(8 TeV)-1 19.7 fbττ→φ Preliminary CMS
[GeV]φm100 200 300 400 1000
[p
b]
)ττ→φ(
B⋅)φ(b
bσ
95%
CL
lim
it o
n
-310
-210
-110
1
10
210
310
φbb
ObservedExpected
Expectedσ 1± Expectedσ 2±
(8 TeV)-1 19.7 fbττ→φ Preliminary CMS
Matthias Schroder ([email protected]) September 4, 2015 37 / 22
Additional Material Φ→ ττ
Φ→ ττ : Sensitivity of Different Channels
J. High Energy Phys. 11 (2014) 056
[GeV]Am100 200 300 400 500 600 700 800 900 1000
βta
n
10
20
30
40
50
60
70
80
hadτlepτ
hadτhadτ
lepτlepτ
-1 L dt = 19.5 - 20.3 fb∫=8 TeV, sATLAS
ττ → = 1 TeV, h/H/ASUSY
scenario, MmaxhMSSM m
95% CL limit
Matthias Schroder ([email protected]) September 4, 2015 38 / 22
Additional Material Φ→ bb
Φ→ bb: Event-B-Tag Definition
CMS-PAS-HIG-14-017 (submitted to J. High Energy Phys.)
M12 templates similar for different flavour combinations
Additional separation by SV-mass information as 2nd dimension
sum of SV masses [GeV]
0 2 4 6 8
a.u.
0.0
0.1
0.2
0.3
0.4
0.5
= 0
jB
= 1
jB
= 2
jB
= 3
jB
udsg jetsc1 jetsc2 jetsb1 jetsb2 jets
(8 TeV)-1CMS (unpublished), 19.7 fb
> 0.898CSV
d
∑SV-masses (SVMS) per jet
Combined into event-b-tag X123
X123 = T12 + T3
T12 = 0 if B1 + B2 ≤ 1T12 = 1 if 2 ≤ B1 + B2 ≤ 3T12 = 2 if B1 + B2 ≥ 4
T3 = 0 if B3 ≤ 1T3 = 3 if B3 = 2T3 = 6 if B3 = 3
→ 9 different values by construction
Matthias Schroder ([email protected]) September 4, 2015 39 / 22
Additional Material Φ→ bb
Φ→ bb: Background-Only Fit (Unrolled Bins)
CMS-PAS-HIG-14-017 (submitted to J. High Energy Phys.)
Eve
nts
0
500
1000
1500
2000
2500
3000
3500
4000
4500 = 0123X = 1123X = 2123X = 3123X = 4123X = 5123X
= 6123X = 7123X = 8123X
Data(B2+B1+C2,b)b(C1,b)b(Q,b)bbb(B2+B1+C2)bb(C1+Q)Pre-fit bin-by-bin uncertaintyTotal post-fit uncertainty
= 30)β= 350 GeV, tanA
(mφ bb×10
(8 TeV)-1CMS (unpublished), 19.7 fb
Bin in maximum-likelihood fit
0 20 40 60 80 100 120 140 160 180 200
Dat
a/B
kg
0.91.01.1
Matthias Schroder ([email protected]) September 4, 2015 40 / 22
Additional Material Φ→ bb
Φ→ bb: Signal+Background Fit (Unrolled Bins)
CMS-PAS-HIG-14-017 (submitted to J. High Energy Phys.)
Eve
nts
0
500
1000
1500
2000
2500
3000
3500
4000
4500 = 0123X = 1123X = 2123X = 3123X = 4123X = 5123X
= 6123X = 7123X = 8123X
Data(350 GeV)φbb
(B2+B1+C2,b)b(C1,b)b(Q,b)bbb(B2+B1+C2)bb(C1+Q)Pre-fit bin-by-bin uncertaintyTotal post-fit uncertainty
(8 TeV)-1CMS (unpublished), 19.7 fb
Bin in maximum-likelihood fit
0 20 40 60 80 100 120 140 160 180 200
Dat
a/B
kg
0.91.01.1
Matthias Schroder ([email protected]) September 4, 2015 41 / 22
Additional Material Φ→ bb
Φ→ bb: Model-Independent Interpretation
CMS-PAS-HIG-14-017 (submitted to J. High Energy Phys.)
[GeV]φm
100 200 300 400 500 600 700 800 900
) [p
b]bb
→φ(B ×
+X
) φb
→(p
pσ
1
10
210
310 (8 TeV)-1CMS, 19.7 fb
95% CL limitExpected
expectedσ1± expectedσ2±
Observed
Matthias Schroder ([email protected]) September 4, 2015 42 / 22
Additional Material Φ→ µµ
Φ→ µµ: Signal & Background Models
CMS-PAS-HIG-13-024 (submitted to Phys. Lett. B)
Eve
nts
/ 2 G
eV
0
50
100
= 30β = 150 GeV tan Am
(8 TeV)-119.3 fbCMS Simulation
(GeV)-µ+µm100 150 200 250 300
Pul
l
2−1−012
Eve
nts
/ 2 G
eV
210
310
410no b tag
(8 TeV)-119.3 fbCMS
(GeV)-µ+µm100 150 200 250 300
Pul
l4−2−024
Matthias Schroder ([email protected]) September 4, 2015 43 / 22
Additional Material Φ→ µµ
Φ→ µµ: MSSM Interpretation
CMS-PAS-HIG-13-024 (submitted to Phys. Lett. B)
(GeV)Am150 200 250 300
βta
n
0
10
20
30
40
50
60
- 95% CL upper limithmod+m
σ 2±Expected limit
σ 1±Expected limit
Expected limit
Observed limit
(7 TeV)-1 (8 TeV) + 5.1 fb-119.3 fbCMS
(GeV)Am150 200 250 300
β ta
n∆
2−
0
2
4
6
hmaxm
hmod-m
light stop
light stau
(7 TeV)-1 (8 TeV) + 5.1 fb-119.3 fbCMS
Matthias Schroder ([email protected]) September 4, 2015 44 / 22
Additional Material Φ→ µµ
Φ→ µµ: Model-Independent Results
CMS-PAS-HIG-13-024 (submitted to Phys. Lett. B)
(GeV)φm200 300 400 500
(fb
)B ⋅ σ
95%
CL
uppe
r lim
it on
1
10
210
310
σ 2±Expected limit
σ 1±Expected limit
Expected limit
Observed limit
φbb→gg-µ+µ→φ
(7 TeV)-1 (8 TeV) + 5.1 fb-119.3 fbCMS
(GeV)φm200 300 400 500
(fb
)B ⋅ σ
95%
CL
uppe
r lim
it on
1
10
210
310
σ 2±Expected limit
σ 1±Expected limit
Expected limit
Observed limit
φ→gg-µ+µ→φ
(7 TeV)-1 (8 TeV) + 5.1 fb-119.3 fbCMS
Matthias Schroder ([email protected]) September 4, 2015 45 / 22
Additional Material h(125)→ aa→ µµττ
H→ a(5)a(5)→ µµττ Interpretation
arXiv:1505.01609 (submitted to Phys. Rev. D)
[GeV]Hm100 150 200 250 300 350 400 450 500
[pb]
2 )τ
τ→
BR
(a×
aa)
→ B
R(H
× H
) →
(gg
σ
110
1
10
210 = 5 GeVam
Observed 95% CL
Median Expected 95% CL
σ 1 ±
σ 2 ±
H→SM gg
ATLAS1 = 8 TeV, 20.3 fbs
Assuming mh = 125 GeV and ma = 5 GeV
Matthias Schroder ([email protected]) September 4, 2015 46 / 22