INSTITUT FUR EXPERIMENTELLE KERNPHYSIK
Statistical Evaluation of the Search for Associated Production of a Higgs
Boson and a Single Top Quark at the CMS ExperimentDPG Fruhjahrstagung Mainz 2014Ch. Boser, Th. Chwalek, N. Faltermann, Simon Fink, B. Maier, Th. Muller, J. Wagner-Kuhr | 25.03.2014
KIT – University of the State of Baden-Wuerttemberg and
National Laboratory of the Helmholtz Association
www.kit.edu
Introduction
Follow up talk to Benedikt Maier (T 62.2) and ChristianBoser (T 62.6)
search for Higgs production in association with a singletop quark
focus on H → bb channel
analysis is still blinded, so no observed limits today
q
g
q′
b
b
b
b
`+
ν
W
b
tH
W
Topics of this talk:classification MVAsystematic uncertainties(expected) limit setting
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 2/14
Event Selection
Event topology:4 b quarks1 isolated lepton1 light forward jet
q
g
q′
b
b
b
b
`+
ν
W
b
tH
W
Defined 2 signal regions:3 tag region
3 b-tags (CSVT)
# jets ≥ 4exactly onemuon/electron
4 tag region4 b-tags (CSVT)
# jets ≥ 5exactly onemuon/electron
Additional control regiontt control region
2 b-tags (CSVT)
# jets = 4
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 3/14
Yields
Yields in the 4 analysis bins
Integrated Luminosity of 19.7fb−1
Muon Channel
Process 3T 4T
t t 1302 50.3single top 51 0.2t tH 14 2.0Electroweak 42 0.0
Σ backgrounds 1408 52.5
tH (κt = −1) 8 0.9S / B ratio 0.6% 1.7%
Electron Channel
Process 3T 4T
t t 895 30.5single top 37 0.7t tH 10 1.6Electroweak 8 20.5
Σ backgrounds 950 53.3
tH (κt = −1) 5 0.6S / B ratio 0.6% 1.1%
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 4/14
Signal extraction - MVA
MVA tool is used to separate signalfrom background3 different input variable classes:
tH reconstruction dependent variablestt reconstruction dependent variablesglobal variables
Signal enriched phase space
tH reconstruction ttbar reconstruction
tH variables ttbar variables global variables
final MVA discriminator tH vs background
fit on MVA output
'
&
$
%MVA is trained in 3T bin against all backgrounds
Currently the MLP method of TMVA is used
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 5/14
MVA - tH variables g
tH reconstruction dependent inputvariables:
cosθ∗
∆R(j1,H ,j2,H )
|η(light jet)|
# b-tags of Higgs jets
log pT (Higgs)
log pT (light jet)
tH variables
))top
,q2top
(q1ηmax(0 1 2 3 4 50
0.05
0.1
)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
# b-tags of Higgs jets0 1 20
0.2
0.4
0.6
0.8 )btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
(light jet)|η|0 1 2 3 4 50
0.05
0.1
)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 6/14
MVA - ttbar variables g
tt reconstruction dependent inputvariables:
jet charge(bthad )* lep. charge
∆R(jq1,jq2)
log(m(thad )−m(Wthad ))
log m(thad )
|max(ηq1,ηq2)|log(max(m(b,q1),m(b,q2)))
# jets from Wthad
with b-tag
ttbar variables
log tt_MaxMass_BTopHadLight4 4.5 5 5.50
0.05
0.1
0.15
)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
) * lepton chargehadt
jet charge (b-1 -0.5 0 0.5 10
0.05
0.1
0.15)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
)hadW-m
hadtlog(m
4 4.5 50
0.05
0.1
0.15
)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 7/14
MVA - global variables
global input variables:
lepton charge
log 6ET
log pT (leading jet)
Sphericity
log(√
s)
global variables
sphericity0 0.05 0.1 0.15 0.20
0.05
0.1
0.15
)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
(1. jet)T
log p3 4 5 6 7 80
0.1
0.2
)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
slog
5.5 6 6.5 7 7.5 80
0.05
0.1)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 8/14
MVA - validation g
MVA shows good separation
no noticeable overtraining
good agreement between data and MCin tt CR final MVA discriminator
tH vs background
MVA output-1 -0.5 0 0.5 10
0.05
0.1
0.15
0.2
)btHq(b
background
=8 TeVs
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
Work in progress
3T, µ
NN output-1 -0.5 0 0.5 1
even
ts
0
2000
4000
6000
data
)btH(b
tt
tSingle t/
ttH
Electroweak
TH-madgraph-Summer12
MC stat.
=8 TeVs -1L=19.7 fb
)b)H(bνµt(b CRtt
NN output-1 -0.5 0 0.5 1
data
(dat
a-m
c)
-0.4-0.2
00.20.4
MC stat.
Work in progress
tt CR, µ
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 9/14
Final MVA Classifier g
Classification weights applied to two analysisbins in two lepton channels
MVA output transformed from −1 to 1 in 15 binsto ensure enough MC events in outer bins
CLs Limits are currently calculated by fitting thewhole range with THETA package
fit on MVA output
MVA output-1 -0.5 0 0.5 1
even
ts
0
100
200
300data
)btH(b
tt
tSingle t/
ttH
Electroweak
(TH-madgraph-Summer12)σ50x
MC stat.
=8 TeVs -1L=19.7 fb
)b)H(bνµt(b3T Region
=125 GeVH
=-1, mtκ
MVA output-1 -0.5 0 0.5 1
data
(dat
a-m
c)
-0.4-0.2
00.20.4
MC stat.
3T, µ
Work in progress
MVA output-1 -0.5 0 0.5 1
even
ts
0
5
10
15 data
)btH(b
tt
tSingle t/
ttH
Electroweak
(TH-madgraph-Summer12)σ15x
MC stat.
=8 TeVs -1L=19.7 fb
)b)H(bνµt(b4T Region
=125 GeVH
=-1, mtκ
MVA output-1 -0.5 0 0.5 1
data
(dat
a-m
c)
-1
-0.5
0
0.5
1MC stat.
4T, µ
Work in progress
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 10/14
Shapes for different systematics
Considering rate and shape systematics for all processes
MVA output-1 -0.5 0 0.5 1
Eve
nts
0
0.05
0.1
0.15
=8 TeVs -1L=19.7 fb
), 3T Regionb)H(bνt(bl
=H
=-1, mtκ 125 GeV
systematicsJER
Nominal
Up
Down
Work in progress
JER, tHq
MVA output-1 -0.5 0 0.5 1
Eve
nts
0
0.05
0.1
0.15
=8 TeVs -1L=19.7 fb
), 3T Regionb)H(bνt(bl
=H
=-1, mtκ "125"GeV
Nominal
Up
Down
Work in progress
PU, tHq
MVA output-1 -0.5 0 0.5 1
Eve
nts
0
0.05
0.1
0.15
=8 TeVs -1L=19.7 fb
), 3T Regionb)H(bνt(bl
=H
=-1, mtκ 125 GeV
systematicsJES
Nominal
Up
Down
JES, tHq
Work in progress
MVA output-1 -0.5 0 0.5 1
Eve
nts
0
0.05
0.1
0.15
=8 TeVs -1L=19.7 fb
), 3T Regionb)H(bνt(bl
=H
=-1, mtκ GeV
Nominal
Up
Down
Work in progress
Top pT,tt
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 11/14
Impact of different Uncertainties
Studied influence of different systematic uncertainties for the MCapproachTwo different approaches:
Without systematics, only taking one systematic into accountFull systematics, only taking one systematic out at a time
Systematic Sourceeffect on limit
only source without source
Pile Up −6.44% +0.26%BTag +15.62% +1.39%Mistag +1.24% −0.38%JES +10.40% −0.48%JER −5.47% −0.55%Unclustered Energy −0.43% −2.36%Cross sections +13.59% −5.73%Lepton Efficiency +2.37% +3.92%Luminosity +5.16% −6.72%Matching +0.55% +0.29%
Q2 scale +1.48% −0.65%Top pT reweighting +5.70% +4.61%
b tag rate, luminosity and cross section uncertainties have the largestimpact on the final limit
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 12/14
Expected Limits for tHq(H → bb) - MCbased approach
comb 3T 4T
= -
1tκσ/σ
lim
it on
S
95%
C.L
. CL
0
10
20
30 = 8 TeVs -1L = 19.7 fb
tHq production→pp b b→, H ν bl→t
= 125 GeVH
= -1, mtκ
expectedsCL
exp.s CLσ 1±
exp.s CLσ 2±
Work in progress
95% CLs [σ/σpred ]
3 tag 8.004 tag 12.24
Comb. 5.89
Can exclude tH with anomalous coupling with ≈ 5× expected cross section
limit is driven by 3 tag bin
recent studies show ∼ 20% improvement is reachable with CSV variablesas input variables
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 13/14
Outlook & future plans
Short TermGet ready to unblind!Be on our toes for sensitivity improvements
Long TermWait for new and more dataSearch for SM coupling with κt = +1
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 14/14
BACKUP
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 15/14
Classification Input variables - Electronchannel I (scaled to eq. area)
Lepton_Charged-1 0 10
5000
10000
15000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
Lepton_Charged-1 0 1
data
(dat
a-m
c)
-0.001
0
0.001MC stat.
Work in progress
)sln(
5 6 7 8 9 100
2000
4000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
)sln(5 6 7 8 9 10
data
(dat
a-m
c)
-0.5
0
0.5 MC stat.
Work in progress
1. jet)T
ln(P3 4 5 6 7 80
2000
4000
6000 data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
1. jet)T
ln(P3 4 5 6 7 8
data
(dat
a-m
c)
-0.5
0
0.5MC stat.
Work in progress
log(MET)0 2 4 6 80
5000
10000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
log(MET)0 2 4 6 8
data
(dat
a-m
c)
-0.5
0
0.5 MC stat.
Work in progress
Higgs)T
ln(P0 2 4 60
2000
4000
6000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
Higgs)T
ln(P0 2 4 6
data
(dat
a-m
c)
-1
-0.5
0
0.5
1MC stat.
Work in progress
Recoil)T
ln(P3 4 5 6 70
1000
2000
3000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
Recoil)T
ln(P3 4 5 6 7
data
(dat
a-m
c)
-0.2
0
0.2 MC stat.
Work in progress
Cos LepRecoil-1 -0.5 0 0.5 10
500
1000
1500 data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
Cos LepRecoil-1 -0.5 0 0.5 1
data
(dat
a-m
c)
-0.2
-0.1
0
0.1
0.2MC stat.
Work in progress
|Recoil
η|0 1 2 3 4 50
500
1000
1500
2000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
|Recoil
η|0 1 2 3 4 5
data
(dat
a-m
c)
-5
0
5 MC stat.
Work in progress
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 16/14
Classification Input variables - Electronchannel II (scaled to eq. area)
Sphericity0 0.05 0.1 0.15 0.20
1000
2000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
Sphericity0 0.05 0.1 0.15 0.2
data
(dat
a-m
c)
-0.5
0
0.5 MC stat.
Work in progress
)top
,q2top
(q1ηmax(0 1 2 3 4 50
1000
2000
3000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
)top
,q2top
(q1ηmax(0 1 2 3 4 5
data
(dat
a-m
c)
-2
-1
0
1
2MC stat.
Work in progress
)hadt
ln(m4 5 6 7 80
5000
10000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
)hadt
ln(m4 5 6 7 8
data
(dat
a-m
c)
-0.5
0
0.5MC stat.
Work in progress
)hadW-m
hadtln(m
3 4 5 6 7 80
5000
10000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
)hadW-m
hadtln(m
3 4 5 6 7 8
data
(dat
a-m
c)
-1
0
1 MC stat.
Work in progress
ln(tt_MaxMass_BTopHadLight)4 5 6 7 80
5000
10000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
ln(tt_MaxMass_BTopHadLight)4 5 6 7 8
data
(dat
a-m
c)
-1
0
1MC stat.
Work in progress
# btags of Higgs jets0 0.5 1 1.5 20
10000
20000
30000 data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
# btags of Higgs jets0 0.5 1 1.5 2
data
(dat
a-m
c)
-0.05
0
0.05MC stat.
Work in progress
jetshad
# btags of Top0 0.5 1 1.5 20
10000
20000
30000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
jetshad
# btags of Top0 0.5 1 1.5 2
data
(dat
a-m
c)
-0.1
-0.05
0
0.05
0.1MC stat.
Work in progress
)Higgs
,jHiggs
R(j∆0 1 2 3 4 50
1000
2000
3000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
)Higgs
,jHiggs
R(j∆0 1 2 3 4 5
data
(dat
a-m
c)
-1-0.5
00.5
1MC stat.
Work in progress
jets)had
R(Top∆0 1 2 3 4 50
1000
2000
3000 data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
jets)had
R(Top∆0 1 2 3 4 5
data
(dat
a-m
c)
-0.5
0
0.5 MC stat.
Work in progress
SumCharge_light-1 0 10
1000
2000
3000 data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνt(be CRtt
SumCharge_light-1 0 1
data
(dat
a-m
c)
-0.2-0.1
00.10.2
MC stat.
Work in progress
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 17/14
Classification Input variables - Muonchannel I (scaled to eq. area)
Lepton_Charged-1 0 10
10000
20000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
Lepton_Charged-1 0 1
data
(dat
a-m
c)
-0.001
0
0.001 MC stat.
Work in progress
)sln(
5 6 7 8 9 100
2000
4000
6000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
)sln(5 6 7 8 9 10
data
(dat
a-m
c)
-5
0
5MC stat.
Work in progress
1. jet)T
ln(P3 4 5 6 7 80
2000
4000
6000
8000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
1. jet)T
ln(P3 4 5 6 7 8
data
(dat
a-m
c)
-0.5
0
0.5 MC stat.
Work in progress
log(MET)3 4 5 6 7 80
2000
4000
6000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
log(MET)3 4 5 6 7 8
data
(dat
a-m
c)
-1
0
1 MC stat.
Work in progress
Higgs)T
ln(P0 2 4 60
2000
4000
6000
8000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
Higgs)T
ln(P0 2 4 6
data
(dat
a-m
c)
-0.5
0
0.5MC stat.
Work in progress
Recoil)T
ln(P3 4 5 6 70
1000
2000
3000
4000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
Recoil)T
ln(P3 4 5 6 7
data
(dat
a-m
c)
-0.5
0
0.5MC stat.
Work in progress
Cos LepRecoil-1 -0.5 0 0.5 10
500
1000
1500
2000 data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
Cos LepRecoil-1 -0.5 0 0.5 1
data
(dat
a-m
c)
-0.1
0
0.1 MC stat.
Work in progress
|Recoil
η|0 1 2 3 4 50
1000
2000
3000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.7 fb
)b)H(bνµt(b CRtt
|Recoil
η|0 1 2 3 4 5
data
(dat
a-m
c)
-1
0
1 MC stat.
Work in progress
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 18/14
Classification Input variables - Muonchannel II (scaled to eq. area)
Sphericity0 0.05 0.1 0.15 0.20
1000
2000
3000
4000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
Sphericity0 0.05 0.1 0.15 0.2
data
(dat
a-m
c)
-1
-0.5
0
0.5
1MC stat.
Work in progress
)top
,q2top
(q1ηmax(0 1 2 3 4 50
1000
2000
3000
4000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
)top
,q2top
(q1ηmax(0 1 2 3 4 5
data
(dat
a-m
c)
-5
0
5MC stat.
Work in progress
)hadt
ln(m4 5 6 7 80
5000
10000
15000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
)hadt
ln(m4 5 6 7 8
data
(dat
a-m
c)
-0.5
0
0.5 MC stat.
Work in progress
)hadW-m
hadtln(m
3 4 5 6 7 80
5000
10000
15000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
)hadW-m
hadtln(m
3 4 5 6 7 8
data
(dat
a-m
c)
-4-2024
MC stat.
Work in progress
ln(tt_MaxMass_BTopHadLight)4 5 6 7 80
5000
10000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
ln(tt_MaxMass_BTopHadLight)4 5 6 7 8
data
(dat
a-m
c)
-2-1012
MC stat.
Work in progress
# btags of Higgs jets0 0.5 1 1.5 20
10000
20000
30000
40000 data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
# btags of Higgs jets0 0.5 1 1.5 2
data
(dat
a-m
c)
-0.05
0
0.05 MC stat.
Work in progress
jetshad
# btags of Top0 0.5 1 1.5 20
10000
20000
30000
40000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
jetshad
# btags of Top0 0.5 1 1.5 2
data
(dat
a-m
c)
-0.05
0
0.05 MC stat.
Work in progress
)Higgs
,jHiggs
R(j∆0 1 2 3 4 50
2000
4000
data)btH(b
tttSingle t/
ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
)Higgs
,jHiggs
R(j∆0 1 2 3 4 5
data
(dat
a-m
c)
-2
0
2 MC stat.
Work in progress
jets)had
R(Top∆0 1 2 3 4 50
1000
2000
3000
4000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
jets)had
R(Top∆0 1 2 3 4 5
data
(dat
a-m
c)
-0.2
0
0.2 MC stat.
Work in progress
SumCharge_light-1 0 10
1000
2000
3000
4000data
)btH(btt
tSingle t/ttHElectroweakMC stat.
=8 TeVs -1L=19.3 fb
)b)H(bνµt(b CRtt
SumCharge_light-1 0 1
data
(dat
a-m
c)
-0.2
0
0.2 MC stat.
Work in progress
Simon Fink Statistical Evaluation in Single Top+Higgs 25.03.2014 19/14