h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
hep-ph/0608079v1
I MSSM neutral h/H/A→ ττ
I Charged Higgs bosons
H+ → τhadν
H+ → τlepν
H+ → cs̄
I Fermiophobic H → γγ
I Doubly charged Higgs H++ → µ+µ+
I NMSSM a1 → µµ
2 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
MSSM h/A/H → ττ (ATLAS-CONF-2011-132) 1.06 fb−1
MSSM Higgs sector
I 5 Higgs bosons: h,H (CP=+1)A (CP=-1),H±
I soft breaking parameters fixed inbenchmark scenarios (e.g. mmax
h ),keeping dependence on mA, tanβ
I medium/high tanβ:I b-quark associated production and
gluon-gluon-fusionI almost no decays to WW/ZZ,≈ 90% bb̄, 10% ττ
[GeV]φM
2103
10
+ X
) [p
b]
φ →
(pp
σ
410
310
210
110
1
10
210
A→gg
h/H→gg
bbA
bbh/H
= 30βtanmhmax scenario
h H
A = 7 TeVs
LH
C H
IGG
S X
S W
G 2
010
Analyzed channels BR
ττ → eµ+ 4ν 6%ττ → e/µτhad + 3ν 46%ττ → τhadτhad + 2ν 42%
3 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
eµ channel
I 1 e, 1 µ, isolation, qe = −qµI cuts against tt̄, diboson:
I ∆Φeµ > 2.0 rad,I peT + pµT + Emiss
T < 120 GeV
I 90% Z → ττ : embedddingtechnique from Z → µµ
I 5% QCD multi-jet: estimatedfrom control regions
I remaining 5% from simulation
I use effective mass:
meff.ττ =
√(pe + pµ + pEmiss
T)2
Data 2471
Backgrounds 2600± 200Signal (mA = 120 GeV, 155± 6tan β = 20, mmaxh )
[GeV]µT,
+pT,e
+pT,missE
0 50 100 150 200 250 300 350 400
Events
/ 1
0 G
eV
0
100
200
300
400
500
600
700
800
900Data 2011
=20β, tanττ →A(120)/h/H
) embeddedττ→*(γZ/
Others
Diboson
QCD multijet
& singletttsyst.
PreliminaryATLAS
1Ldt = 1.06 fb∫ = 7 TeV, s
channelµe
effective [GeV]ττm
0 50 100 150 200 250
Events
/ 1
0 G
eV
0
100
200
300
400
500
600
700 Data 2011
=20β, tanττ →A(120)/h/H
) embeddedττ→*(γZ/
Others
Diboson
QCD multijet
& singlettt
syst.
PreliminaryATLAS
1Ldt = 1.06 fb∫ = 7 TeV, s
channelµe
4 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
e/µτhad channels
I 1 e or 1 µ, 1 identified hadronic τ ,opposite electric charge
I EmissT > 20 GeV (vs. QCD, Z → ``)
I mT (`, EmissT ) < 30 GeV (vs. W → `ν)
I veto on double leptons
I ≈ 70% Z → ττ : embedding
I QCD and W+jets: estimate fromsame-sign control region
I use Missing Mass Calculator(MMC)(NIM A654 (2011) 481)
eτhad µτhad
Data 626 1287
Backgrounds 775± 40 1378± 43Signal (mA = 120 GeV, 41± 4 75± 5tan β = 20, mmaxh )
[GeV]T,missE
0 10 20 30 40 50 60 70 80 90 100
Eve
nts
/ 2
Ge
V
0
100
200
300
400
500
[GeV]T,missE
0 10 20 30 40 50 60 70 80 90 100
Eve
nts
/ 2
Ge
V
0
100
200
300
400
500Data 2011
=20β, tanττ→A(120)/H/h
) emb.(OSSS)ττ→*(γZ/
Others(OSSS)
W+jets (OSSS)
Same Sign
stat.
channelshad
τµ + hadτe
1 L = 1.06 fb∫ = 7TeV, s
ATLAS Preliminary
[GeV]ττMMC m
0 50 100 150 200 250 300 350 400
Eve
nts
/ 1
0 G
eV
0
50
100
150
200
250
300
350
400
[GeV]ττMMC m
0 50 100 150 200 250 300 350 400
Eve
nts
/ 1
0 G
eV
0
50
100
150
200
250
300
350
400Data 2011
=20β, tanττ→A(120)/H/h
) emb.(OSSS)ττ→*(γZ/
Others(OSSS)
W+jets (OSSS)
Same Sign
stat.
channelshad
τµ + hadτe
1 L = 1.06 fb∫ = 7TeV, s
ATLAS Preliminary
5 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
τhadτhad channel
I two identified hadronic τ ’s
I EmissT > 25 GeV vs. QCD and Z
I veto on events with electron or muon
I dominant QCD background estimatedfrom control regions
I Z → ττ and W → τν fromsimulation, validated with embeddingtechnique
I use visible mass mτhadτhad
Data 245
Backgrounds 233+44−28
Signal (mA = 200 GeV, 19± 1tan β = 20, mmaxh )
[GeV]missTE
0 20 40 60 80 100
Events
/ 5
GeV
0
20
40
60
80
100
120
140
[GeV]missTE
0 20 40 60 80 100
Events
/ 5
GeV
0
20
40
60
80
100
120
140 Data 2011
=20β, tanττ →A(200)/H/h
MultiJet
)ττ→*(γZ/
) + jetsντ→W(
Others
stat.
1Ldt = 1.06 fb∫ = 7 TeV, s
PreliminaryATLAS
channelhad
τhad
τ
visible [GeV]ττm
0 100 200 300 400 500 600
Events
/ 1
5 G
eV
0
10
20
30
40
50
60
70
visible [GeV]ττm
0 100 200 300 400 500 600
Events
/ 1
5 G
eV
0
10
20
30
40
50
60
70Data 2011
=20β, tanττ →A(200)/H/h
MultiJet
)ττ→*(γZ/
) + jetsντ→W(
Others
stat.
1Ldt = 1.06 fb∫ = 7 TeV, s
PreliminaryATLAS
channelhad
τhad
τ
6 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
MSSM h/A/H → ττ : Limits
σ ×BR(φ→ ττ)
I assume only one resonance:I 100% gg → φ or 100% bb̄φ
(acceptances slightly different)
I useful to test arbitrary models
[GeV]φm
100 200 300 400 500 600
) [p
b]
ττ →φ
BR
(× φ
σ95%
CL u
pp
er
limit o
n
110
1
10
210
310 CLsφ →Observed gg
φ →Expected gg
CLsφObserved bb
φExpected bb
) theory ττ→SM
x BR(HSM
σ
1 Ldt = 1.06 fb∫ = 7 TeV, s
All channels
ATLAS Preliminary
(mA, tan β)-plane
I have to assume specific(c)MSSM scenario
I here: mmaxh -scenario
[GeV]Am
100 150 200 250 300 350 400 450
βta
n
0
10
20
30
40
50
60All channels
1 Ldt = 1.06 fb∫ = 7 TeV, s
>0µ, maxhm
ATLAS Preliminary
Observed CLsExpected CLs
σ 1±σ 2±
LEP observed1ATLAS 36 pb expected1ATLAS 36 pb
7 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Charged Higgs bosons
I predicted in Higgs doublet(e.g. MSSM) and triplet models
I mH+ < mt: producedpredominantly in top quarkdecays
I tanβ > 3 ⇒ decays to τνpreferred
I heavy H+: gb→ tH+
important, more data needed
f
f′g
g
g
ντ
τ+
H+
W-
t
t
b
b
βtan0 10 20 30 40 50
)±
bH
→B
R(t
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
FeynHiggs
HDECAY
= 200 GeVµ
= 1
00 G
eV
±H
m = 1
20 G
eV
±Hm
= 1
40 GeV
±Hm
= 160 GeV±
Hm
LH
C H
IGG
S X
S W
G 2
011
8 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
τhad channel (W → qq̄′, H+ → τhadν)
I 1 identified hadronic τ (pT > 35 GeV),veto on identified electrons and muons
I missing transverse energy
I at least 4 jets, ≥ 1 b-tagged
I final discriminant: mT (τhad, EmissT )
I background with true τ -leptons from data:tt̄→ µ+jets and embedding technique
I e→ τ and jet→ τ misidentification byapplying measured misd. probabilities tosimulation
I multi-jet (no real EmissT ): fit of Emiss
T
distribution to data
[GeV]Tm
0 50 100 150 200 250 300
Eve
nts
/ 2
0 G
eV
0
5
10
15
20
25Data 2011
misidτ→e
misidτ→Jet
τTrue
Multi−jets
(130), B=0.1+
H
+background+
H
1 L dt=1.03 fb∫
ATLAS Preliminary
9 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Limits for H+ → τhadν channel
I Observation compatible with background expectation
Model independent
I place limit onBR(t→ H+b)×BR(H+ → τν)
I can be compared to any model!
[GeV]+H
m
90 100 110 120 130 140 150 160
)τν
→+
H B
(×
) b
+H
→ t95
% C
L o
n B
(
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
0.22
Expected Limit
σ 1±Expected
σ 2±Expected
Observed Limit
D0 Observed
1 L dt= 1.03 fb∫Data 2011
ATLAS Preliminary
MSSM Interpretation
I assume specific (c)MSSM model,here: mmax
h
I limit in (mH+ , tanβ)-plane
[GeV]+H
m
90 100 110 120 130 140 150 160
βta
n
0
10
20
30
40
50
60Expected Limit
σ 1±Expected
σ 2±Expected
Observed Limit
σ 1 ±Observed,
theor. uncertainties
1 L dt= 1.03 fb∫Data 2011
maxhm
ATLAS Preliminary
10 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
τlep channels H+ → τlepν,W → qq̄′ or `ν
I common technique: introduce new variable
cos θ∗l =2m2
bl
m2top−m2
W− 1
I constrain tt̄→ bb̄W+W− contribution(cannot rely on theory) from control regionwith large cos θ∗l , signal region: small cos θ∗l
I final discriminants: transverse masses mHT ,
mHT2 (Phys. Rev. D 81 (2010) 055010)
example for 1 lepton channel
*θcos1 0.5 0 0.5 1
Eve
nts
/ 0
.2
0
200
400
600
800
1000
1200
1400
*θcos1 0.5 0 0.5 1
Eve
nts
/ 0
.2
0
200
400
600
800
1000
1200
1400
ATLAS Preliminary
= 130 GeV+H
m
) = 10%+
bH→Br(t
1Ldt = 1.03 fb∫
)+
(with Htt
)
W+
(WttSingle top
Z + jets
W + jets
Diboson
QCD
Data 2011
1le
pto
nch
ann
el
[GeV]HTm
20 40 60 80 100 120 140 160 180
Eve
nts
/ 1
0 G
eV
0
20
40
60
80
100
120
[GeV]HTm
20 40 60 80 100 120 140 160 180
Eve
nts
/ 1
0 G
eV
0
20
40
60
80
100
120
ATLAS Preliminary
= 130 GeV+H
m
) = 10%+
bH→Br(t
1Ldt = 1.03 fb∫
)+
(with Htt
)
W+
(WttSingle top
Z + jets
W + jets
Diboson
QCD
Data 2011 2le
pto
nch
ann
el
[GeV]HT2m
40 60 80 100 120 140 160 180 200
Eve
nts
/ 1
0 G
eV
0
50
100
150
200
250
[GeV]HT2m
40 60 80 100 120 140 160 180 200
Eve
nts
/ 1
0 G
eV
0
50
100
150
200
250
ATLAS Preliminary
= 130 GeV+H
m
) = 10%+
bH→Br(t
1Ldt = 1.03 fb∫
)+
(with Htt
)
W+
(WttSingle top
Z + jets
Diboson
QCD & W
Data 2011
11 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Limits for leptonic channels, H+ → τlepν,W → qq̄/`ν′
I Observation compatible with background expectation ⇒ set limits
Model independent
I place limit on BR(t→ H+b)assuming BR(H+ → τν) = 1
I can be compared to any model!
[GeV]+H
m
90 100 110 120 130 140 150 160
+ b
H→
t 95%
C.L
. upper
bound o
n B
r
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
Observed CLsExpected
σ 1±σ 2±
ATLAS Preliminary = 7 TeVsData 2011
1Ldt = 1.03 fb∫
MSSM Interpretation
I assume specific (c)MSSM model,here: mmax
h
I limit in (mH+ , tanβ)-plane
[GeV]+H
m
90 100 110 120 130 140
βta
n
0
10
20
30
40
50
60
Expected Limit
σ 1±Expected
σ 2±Expected
Observed Limit
σ 1±Observed,
theor. uncertainties
1Ldt = 1.03 fb∫Data 2011
maxhm
ATLAS Preliminary
12 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
H+ → cs̄, ATLAS-CONF-2011-094,∫Ldt = 35 pb−1
H+ → cs̄
I H+ → cs̄ dominatesfor tanβ < 1
I details of analysis inbackup
I observationcompatible withbackgroundexpectation
I set limits onBR(t→ H+b)assumingBR(H+ → cs̄) = 1
[GeV]+H
m
90 100 110 120 130
) =
1s
c→
+b)
with B
(H+
H→
95%
CL o
n B
(t
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Expected Limit
σ 1±Expected
σ 2±Expected
Observed Limit
CDF Observed
D0 Observed
Limits at 95% CL:1
L = 35 pb∫ATLAS Preliminary
mH+ [GeV]
I already with 35 pb−1 comparable toTevatron results
13 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Fermiophobic H → γγ, ATLAS-CONF-2011-149,∫Ldt = 1.08 fb−1
Fermiophobic Benchmark Scenario
I Higgs doublet or triplet modelswith decreased couplings to someor all fermions
I fermiophobic benchmark scenario:I no coupling to fermionsI gauge boson couplings as in SM
I mH < 120 GeV:σ ×BR(H → γγ) increasedcompared to SM [GeV]HM
100 150 200 250
BR
[p
b]
× σ
-310
-210
-110
1
10
210
LH
C H
IGG
S X
S W
G 2
011
Fermiophobic = 7TeVs
γγ
(SM)γγ
γZ (SM)γZ
WW
WW (SM)
ZZ
ZZ (SM)
14 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
I 2 isolated photons,pT > 40/20 GeV,100 GeV < mγγ < 160 GeV
I VH and VBF only ⇒ boostedHiggs, use 3 bins of pT(γγ):
I pT(γγ) ≤ 50 GeVI 50 GeV < pT(γγ) ≤ 100 GeVI 100 GeV < pT(γγ)
I background: 2nd order Bernsteinpolynomial
I signal: Crystal Ball + wide Gaussian
mγγ [GeV] mγγ [GeV] mγγ [GeV]
15 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Exclusion limits @95% CL
I simplistic fermiophobic benchmark model
I expected:110 GeV — 116 GeV
I observed:110 GeV — 111 GeV and 113.5 GeV — 117.5 GeV
16 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Doubly charged Higgs, ATLAS-CONF-2011-127,∫Ldt = 1.6 fb−1
I predicted in left-right symmetric,Higgs triplet and little Higgs models
I production via pp→ H++H−−
I same-sign dimuons
I look for dimuon mass resonance
Dim
uon p
airs / 1
0 G
eV
110
1
10
210
Data
µNonprompt
Diboson
(150 GeV)±±LH
(200 GeV)±±LH
(300 GeV)±±LH
ATLAS Preliminary ∫ 1Ldt = 1.6 fb
[GeV]±µ±µm
0 50 100 150 200 250 300 350
Da
ta /
bkg
0
1
2
I no excess ⇒ set limits onσ(H++H−−)×BR(H±± → µ±µ±)
mass [GeV]±±H
100 150 200 250 300 350 400
) [f
b]
±µ ±
µ → ±±
BR
(H×)±±
H±± H
→(p
p
σ -110
1
10
210
Observed 95% upper limit
Expected 95% upper limit
68% of Pseudo-Experiments
95% of Pseudo-Experiments
)=100%±µ±µ→±± production, BR(H±±Left-handed H
)=100%±µ±µ→±± production, BR(H±±Right-handed H
ATLAS Preliminary
∫ -1Ldt = 1.6 fb
I mH++L
< 375 GeV, mH++R
< 295 GeV(assuming BR(H±± → µ±µ±) = 1)
17 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
NMSSM a1 → µµ, ATLAS-CONF-2011-020,∫Ldt = 39 pb−1
I NMSSM: additional complexsinglet scalar field to solve µproblem
I 3 CP-even scalars (h1, h2, h3),2 CP-odd scalars (a1, a2), H±
I a1 can be very light, i.e.ma1
< 2mB
Analysis
I opposite sign dimuons
I likelihood ratio selection
I limit setting by fit to massspectrum
I Υ region excluded
Invariant dimuon mass:
[GeV]µµm
6 7 8 9 10 11 12
Entr
ies/1
00 M
eV
210
310
410
510
ATLASPreliminary
1
L dt = 39 pb∫ = 7 TeV, s
Data : Before the LR selection
Data : After the LR selection
) = 6.5 GeV1
MC : m(a
) = 7.5 GeV 1
MC : m(a
) = 8.5 GeV1
MC : m(a
) = 11.5 GeV1
MC : m(a
[GeV]µµm
6 7 8 9 10 11 12
Entr
ies/1
00 M
eV
210
310
410
510
mµµ[GeV]Limits on σ(gg → a1 → µµ)
[GeV]µµm7 8 9 10 11
[p
b]
µµ
→ 1 a
→g
g
σ
0
200
400
600
800
1000
1200
1400
1600 ATLAS Preliminary
= 7 TeVs
1 L dt = 39 pb∫
Observed limit
Expected limit
mµµ[GeV]18 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Summary and Outlook
I wide variety of BSM Higgsmodels probed
I observations compatible withStandard Model expectations
I set strict upper limits on crosssections and branching fractions
I more data being analyzed,updates soon
I still large parts of BSM Higgsmodels open for discovery!
Day in 2011
28/02 30/04 30/06 30/08 31/10
]1
To
tal In
tegra
ted L
um
inosity [fb
0
1
2
3
4
5
6
7 = 7 TeVs ATLAS Online Luminosity
LHC Delivered
ATLAS Recorded
1Total Delivered: 5.61 fb1Total Recorded: 5.25 fb
19 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
H+ → cs̄, ATLAS-CONF-2011-094,∫Ldt = 35 pb−1
H+ → cs̄,W → eν/µν
I H+ → cs̄ dominates for tanβ < 1
I suppress QCD multijet background byrequiring large Emiss
T and mT
I kinematic fit with top mass constraintto select best charged Higgs candidate
I remaining QCD background estimateddata-driven
I W+ ≥ 4 jets normalized to data
I set limits on BR(t→ H+b) assumingBR(H+ → cs̄) = 1
0 20 40 60 80 100 120 140 1600
5
10
15
20
25
30
35
[GeV] jjm
0 20 40 60 80 100 120 140 160
Events
/ 5
GeV
0
5
10
15
20
25
30
35
1 L = 35 pb∫
Data 2010Background onlyUncertainty
Signal + Background = 110 GeV+
Hm
b) = 18%+ H→BR(t
tNont
ATLAS Preliminary
mjj[GeV]
[GeV]+H
m
90 100 110 120 130
) =
1s
c→
+b)
with B
(H+
H→
95%
CL o
n B
(t
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Expected Limit
σ 1±Expected
σ 2±Expected
Observed Limit
CDF Observed
D0 Observed
Limits at 95% CL:1
L = 35 pb∫ATLAS Preliminary
mH+ [GeV]
I already with 35 pb−1
comparable to Tevatron results21 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Experimental techniques: ττ mass reconstruction
I use mass sensitive variable as final discriminantI eµ channel: effective mass
meff.ττ =
√(pe + pµ + pEmiss
T)2, pEmiss
T= (Emiss
T , EmissT
,x, EmissT
,y, 0)
I τhadτhad channel: visible mass mτhadτhad
Missing Mass Calculator (MMC)
I used in e/µτhad channel
I NIM A654 (2011) 481
I split EmissT in two vectors
(≡ neutrinos from each τ)
I invariant mass with visible decayproducts = mτ
I scan over free pars. and weightwith PDF to come from τ decay
I find mass with highest probability [rad]3Dθ∆
0 0.05 0.1 0.15 0.2
Arb
itra
ry u
nits
0
0.005
0.01
0.015 ATLAS Simulation
Simulationττ→Z
Probability function
decayτ1prong
50 [GeV]≤τ
45<p
22 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
Experimental techniques: Embedding
Z → ττ background estimation
I select Z → µµ
I remove µ′s, take these as τ ’s
I simulate τ -decays and detectorresponse
I remerge with original event
I underlying event, pileup, hadronicactivity: taken from real data!
[GeV]ττMMC m
0 50 100 150 200 250 300
Events
/ 1
0 G
eV
0
50
100
150
200
250
300
µ µ →* γEmbedded Z/
MCτ τ →* γZ/
channelshadτµ + hadτe
1L dt = 1.06 fb∫ = 7 TeV, s
ATLAS Preliminary
23 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
MSSM neutral h/H/A→ ττ : Limits on σ ×BR(φ→ ττ)
I assume 100%gluon-gluon-fusionor 100%b-associatedproduction(acceptancesslightly different)
I assume only oneresonance
I can placemodel-independentlimits on σ ×BR
eµ only
[GeV]φm
100 200 300 400 500 600)
[pb
]ττ
→φ B
R(
× φσ
95%
CL u
pp
er
limit o
n
110
1
10
210
310 CLsφ →Observed gg
φ →Expected gg
CLsφObserved bb
φExpected bb
) theory ττ→SM
x BR(HSM
σ
1 Ldt = 1.06 fb∫ = 7 TeV, s
channelµe
ATLAS Preliminary
`τhad only
[GeV]φm
100 200 300 400 500 600
) [p
b]
ττ →φ
BR
(× φ
σ95%
CL u
pp
er
limit o
n
110
1
10
210
310 CLsφ →Observed gg
φ →Expected gg
CLsφObserved bb
φExpected bb
) theory ττ→SM
x BR(HSM
σ
1 Ldt = 1.06 fb∫ = 7 TeV, s
channelshad
τµ + had
τe
ATLAS Preliminary
τhadτhad only
[GeV]φm
100 200 300 400 500 600
) [p
b]
ττ →φ
BR
(× φ
σ95%
CL u
pp
er
limit o
n
110
1
10
210
310 CLsφ →Observed gg
φ →Expected gg
CLsφObserved bb
φExpected bb
) theory ττ→SM
x BR(HSM
σ
1 Ldt = 1.06 fb∫ = 7 TeV, s
channelhad
τhad
τ
ATLAS Preliminary
combination
[GeV]φm
100 200 300 400 500 600
) [p
b]
ττ →φ
BR
(× φ
σ95%
CL u
pp
er
limit o
n
110
1
10
210
310 CLsφ →Observed gg
φ →Expected gg
CLsφObserved bb
φExpected bb
) theory ττ→SM
x BR(HSM
σ
1 Ldt = 1.06 fb∫ = 7 TeV, s
All channels
ATLAS Preliminary
24 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
MSSM neutral h/H/A→ ττ : Limits in (mA, tanβ)-plane
eµ only
[GeV]Am
100 150 200 250 300 350 400 450
βta
n
0
10
20
30
40
50
60 channelµe
1 Ldt = 1.06 fb∫ = 7 TeV, s
>0µ, maxhm
ATLAS Preliminary
Observed CLs
Expected CLs
σ 1±σ 2±
LEP
`τhad only
[GeV]Am
100 150 200 250 300 350 400 450
βta
n
0
10
20
30
40
50
60 channels
hadτµ + hadτe
1 Ldt = 1.06 fb∫ = 7 TeV, s
>0µ, maxhm
ATLAS Preliminary
Observed CLs
Expected CLs
σ 1±σ 2±
LEP
τhadτhad only
[GeV]Am
100 150 200 250 300 350 400 450
βta
n
0
10
20
30
40
50
60 channelhadτhadτ
1 Ldt = 1.06 fb∫ = 7 TeV, s
>0µ, maxhm
ATLAS Preliminary
Observed CLs
Expected CLs
σ 1±σ 2±
LEP
combination
[GeV]Am
100 150 200 250 300 350 400 450
βta
n
0
10
20
30
40
50
60All channels
1 Ldt = 1.06 fb∫ = 7 TeV, s
>0µ, maxhm
ATLAS Preliminary
Observed (hh only)
Observed (lh only)
Observed (emu only)
Observed CLs
Expected (hh only)
Expected (lh only)
Expected (emu only)
Expected CLs
LEP
25 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
MSSM neutral h/H/A→ ττ : Additional Plots
eµ embedding
effective [GeV]ττm
50 100 150 200 250
Eve
nts
/ 1
0 G
eV
0
100
200
300
400
500
600
µµ →* γEmbedded Z/
MCττ →* γZ/
PreliminaryATLAS
1Ldt = 1.06 fb∫ = 7 TeV, s
channelµe
τhadτhad embedding
visible [GeV]ττm
0 50 100 150 200F
ractio
n o
f E
ve
nts
/ 1
0 G
eV
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
µµ→*
γEmbedded Z/
MCττ→*
γZ/
-1Ldt = 1.06 fb∫ = 7 TeV, s
PreliminaryATLAS channelhad
τhad
τ
τhadτhad embedding
visible [GeV]ττm
0 50 100 150 200
Fra
ctio
n o
f E
ve
nts
/ 2
0 G
eV
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
νµ→Embedded W
MCντ→W
-1Ldt = 1.06 fb∫ = 7 TeV, s
PreliminaryATLAS channelhad
τhad
τ
eµ: ∆φeµ
|µe
φ∆|
0 0.5 1 1.5 2 2.5 3
/25
πE
ve
nts
/
0
200
400
600
800
1000
1200
1400
Data 2011
=20β, tanττ →A(120)/h/H
) embeddedττ→*(γZ/
Others
Diboson
QCD multijet
& singletttsyst.
PreliminaryATLAS
1Ldt = 1.06 fb∫ = 7 TeV, s
channelµe
`τhad: pτT
[GeV]had
τT, p
0 20 40 60 80 100120140160180200
Eve
nts
/ 5
Ge
V
0
100
200
300
400
500
[GeV]had
τT, p
0 20 40 60 80 100120140160180200
Eve
nts
/ 5
Ge
V
0
100
200
300
400
500 Data 2011
=20β, tanττ→A(120)/H/h
) emb.(OSSS)ττ→*(γZ/
Others(OSSS)
W+jets (OSSS)
Same Sign
stat.
channelshad
τµ + hadτe
1 L = 1.06 fb∫ = 7TeV, s
ATLAS Preliminary
τhadτhad: pτT
[GeV]had,1
τT,p
0 20 40 60 80 100 120140160180
Eve
nts
/ 1
5 G
eV
0
20
40
60
80
100
120
140
160
180
200
[GeV]had,1
τT,p
0 20 40 60 80 100 120140160180
Eve
nts
/ 1
5 G
eV
0
20
40
60
80
100
120
140
160
180
200Data 2011
=20β, tanττ →A(200)/H/h
MultiJet
)ττ→*(γZ/
) + jetsντ→W(
Others
stat.
1Ldt = 1.06 fb∫ = 7 TeV, s
PreliminaryATLAS
channelhad
τhad
τ
26 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
H+ → τhadν: Additional Plots
Multi-jet: fit to EmissT
[GeV]missTE
0 50 100 150 200 250 300
Eve
nts
/ 3
0 G
eV
0
5
10
15
20
25
30
35
Multijet
Other MC
Data 2011
1 L dt = 1.03 fb∫
PreliminaryATLAS
Multi-jet: mT
[GeV]Tm
0 50 100 150 200 250 300 350 400
Eve
nts
/ 2
0 G
eV
0
2
4
6
8
10
12
14
16
Multi−jet
Other MC
Data 2011
1 L dt = 1.03 fb∫
PreliminaryATLAS
Embedding: τ -Likelihood
TauLLH0 5 10 15 20 25
Arb
itra
ry u
nits
0
0.05
0.1
0.15
0.2
0.25
0.3Embedded data 2011
MC
1 L dt=1.03 fb∫
ATLAS Preliminary
Embedding: pτT
[GeV]τ
Tp
0 50 100 150 200 250
Arb
itra
ry u
nits
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4Embedded data 2011
MC
1 L dt=1.03 fb∫
ATLAS Preliminary
Embedding: EmissT
[GeV]miss
TE
0 50 100 150 200 250
Arb
itra
ry u
nits
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
Embedded data 2011
MC
1 L dt=1.03 fb∫
ATLAS Preliminary
Embedding: ptopT
[GeV]top
Tp
0 50 100150 200250300350400 450500
Arb
itra
ry u
nits
0
0.05
0.1
0.15
0.2
0.25
0.3
Embedded data 2011
MC
1 L dt=1.03 fb∫
ATLAS Preliminary
27 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
1 lepton channel (H+ → τlepν,W → qq̄′)
I exactly one electron or muon
I ≥ 4 jets, exactly two b-tagged, high EmissT
I combinatorics:min
(χ2 =
(mjjb−mtop)2
σ2top
+(mjj−mW )2
σ2W
)< 5
I cannot rely on theory prediction ofσtt̄→bb̄W+W−
I cos θ∗l =2m2
bl
m2top−m
2W− 1
I constrain tt̄→ bb̄W+W− contribution(cannot rely on theory) fromcontrol region: cos θ∗l > −0.2
I signal region: cos θ∗l < −0.6,mWT < 60 GeV
I final discriminant: transverse mass mHT
(Phys. Rev. D 81 (2010) 055010)
I QCD background:data-driven estimate (fake rates method)
*θcos1 0.5 0 0.5 1
Eve
nts
/ 0
.2
0
200
400
600
800
1000
1200
1400
*θcos1 0.5 0 0.5 1
Eve
nts
/ 0
.2
0
200
400
600
800
1000
1200
1400
ATLAS Preliminary
= 130 GeV+H
m
) = 10%+
bH→Br(t
1Ldt = 1.03 fb∫
)+
(with Htt
)
W+
(WttSingle top
Z + jets
W + jets
Diboson
QCD
Data 2011
[GeV]HTm
20 40 60 80 100 120 140 160 180
Eve
nts
/ 1
0 G
eV
0
20
40
60
80
100
120
[GeV]HTm
20 40 60 80 100 120 140 160 180
Eve
nts
/ 1
0 G
eV
0
20
40
60
80
100
120
ATLAS Preliminary
= 130 GeV+H
m
) = 10%+
bH→Br(t
1Ldt = 1.03 fb∫
)+
(with Htt
)
W+
(WttSingle top
Z + jets
W + jets
Diboson
QCD
Data 2011
28 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
2 lepton channel (H+ → τlepν,W → `ν)
I two oppositely charged leptons
I ≥ 2 jets, exactly two b-tagged
I ee and µµ: Z-veto, EmissT > 40 GeV
I eµ: pµT + peT +∑Ejets
T > 130 GeV
I cannot rely on theory prediction ofσtt̄→bb̄W+W−
I constrain tt̄→ bb̄W+W− contributionfrom control region:
cos θ∗l > −0.4I Signal region:
cos θ∗l < −0.6
I final discriminant: generalised transversemass mH
T2 (Phys. Rev. D 81 (2010) 055010)
I QCD and W background: data-drivenestimate (fake rates method)
side+
*, Hθcos1 0.5 0 0.5 1
Eve
nts
/ 0
.2
0
100
200
300
400
500
600
side+
*, Hθcos1 0.5 0 0.5 1
Eve
nts
/ 0
.2
0
100
200
300
400
500
600
ATLAS Preliminary
= 130 GeV+H
m
) = 10%+
bH→Br(t
1Ldt = 1.03 fb∫
)+
(with Htt
)
W+
(WttSingle top
Z + jets
Diboson
QCD & W
Data 2011
[GeV]HT2m
40 60 80 100 120 140 160 180 200
Eve
nts
/ 1
0 G
eV
0
50
100
150
200
250
[GeV]HT2m
40 60 80 100 120 140 160 180 200
Eve
nts
/ 1
0 G
eV
0
50
100
150
200
250
ATLAS Preliminary
= 130 GeV+H
m
) = 10%+
bH→Br(t
1Ldt = 1.03 fb∫
)+
(with Htt
)
W+
(WttSingle top
Z + jets
Diboson
QCD & W
Data 2011
29 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
H+ → τlepν: Additional Plots
Limit for 1 lepton alone
[GeV]+H
m
90 100 110 120 130 140 150 160
+ b
H→
t 95%
C.L
. upper
bound o
n B
r
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
Observed CLsExpected
σ 1±σ 2±
ATLAS Preliminary = 7 TeVsData 2011
1Ldt = 1.03 fb∫
Limit for 2 lepton alone
[GeV]+H
m
90 100 110 120 130 140 150 160
+ b
H→
t 95%
C.L
. upper
bound o
n B
r
0
0.2
0.4
0.6
0.8
1
Observed CLsExpected
σ 1±σ 2±
ATLAS Preliminary = 7 TeVsData 2011
1Ldt = 1.03 fb∫
30 / 19
h/A/H → ττ H+ → τhadν H+ → τlepν H+ → cs̄ H → γγ H++ → µ+µ+ a1 → µµ Summary
a1 → µµ: Additional Plots
Background-only fits
[GeV]µµm6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11
Entr
ies/0
.05 G
eV
310
410
ATLAS Preliminary
= 7 TeVs
1 L dt = 39 pb∫/d.o.f.: 1.72χ
[GeV]µµm9 9.5 10 10.5 11 11.5 12
Entr
ies/0
.05 G
eV
310
410
ATLAS Preliminary
= 7 TeVs
1 L dt = 39 pb∫/d.o.f.: 1.32χ
31 / 19
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