Validation of ATLAS CONF 2016 013
ATLAS
atlas conf 2016 013
vector-like top quark pairs
Energy: 13 TeV
Luminosity: 3.2 fb
Montecarlo: MadGraph5+Pythia6
Normalization: normalized to NLO values calculated with Top++ by hand
Normalization
signal region
1J , ≥ 6j, ≥ 4b, LM
1J , ≥ 6j, ≥ 4b, HM
2J , ≥ 6j, 3b
2J , ≥ 6j, ≥ 4b
# events ATLAS
1.90 ± 0.26
3.08 ± 0.50
4.83 ± 0.45
4.14 ± 0.65
# events CheckMATE
2.15
1.47
5.25
3.88
rel error
−1.9 σ
−1.7 σ
0.9 σ
−0.4 σ
Table 1: Signal region validation for atlas conf 2016 013 for T T̄ singlet. Shown are numbers of Monte-Carlo
generated events passing the cuts for each signal region for the experimental collaboration. The CheckMATE
result is normalized to the same value. The relative error is given in terms of the error given by ATLAS.
signal region
1J , ≥ 6j, ≥ 4b, LM
1J , ≥ 6j, ≥ 4b, HM
2J , ≥ 6j, 3b
2J , ≥ 6j, ≥ 4b
# events ATLAS
4.18 ± 0.53
6.00 ± 0.81
8.90 ± 0.70
10.0 ± 1.4
# events CheckMATE
3.76
3.34
9.95
8.93
rel error
−2.8 σ
−1.6 σ
1.5 σ
−0.8 σ
Table 2: Signal region validation for atlas conf 2016 013 for T T̄ doublet. Shown are numbers of Monte-Carlo
generated events passing the cuts for each signal region for the experimental collaboration. The CheckMATE
result is normalized to the same value. The relative error is given in terms of the error given by ATLAS.
signal region
1J , ≥ 6j, ≥ 4b, LM
1J , ≥ 6j, ≥ 4b, HM
2J , ≥ 6j, 3b
2J , ≥ 6j, ≥ 4b
# events ATLAS
5.52 ± 0.76
10.5 ± 1.4
12.2 ± 1.2
19.6 ± 2.7
# events CheckMATE
7.02
4.44
13.0
14.9
rel error
−2.5 σ
−1.4 σ
0.7 σ
−1.7 σ
Table 3: Signal region validation for atlas conf 2016 013 for T T̄ singlet with BR(T → Ht) = 1. Shown are numbers
of Monte-Carlo generated events passing the cuts for each signal region for the experimental collaboration. The
CheckMATE result is normalized to the same value. The relative error is given in terms of the error given by
ATLAS.
Distributions
1
A: Preselection
0.30
0.20
0.15
0.10
0.05
0.00
4
6
8
10
jet multiplicity
12
14
0.3
0.2
0.0
16
C:
2
3
4
5
6
b-jet multiplicity
7
8
9
D:
0.5
my singlet
ATLAS singlet
0.08
my singlet
ATLAS singlet
0.4
0.07
Fraction of events
Fraction of events / 10 GeV
0.4
0.1
0.09
0.06
0.05
0.04
0.03
0.02
0.3
0.2
0.1
0.01
0.00
0
50
100
150
200
250
large-R mass [GeV]
300
350
0.0
400
E:
0.16
0.14
0
1
2
0.12
0.10
0.08
0.06
0.04
3
4
Mass-tagged jet multiplicity
5
6
F:
0.20
my singlet
ATLAS singlet
Fraction of events
Fraction of events / 10 GeV
my singlet
ATLAS singlet
0.5
Fraction of events
Fraction of events
0.25
B:
0.6
my singlet
ATLAS singlet
my singlet
ATLAS singlet
0.15
0.10
0.05
0.02
0.00
0
50
100
150
mbb [GeV]
200
250
0.00
300
0
500
1000
1500
m_eff [GeV]
2000
2500
3000
Figure 1: Kinematic distributions for T T̄ singlet compared to distributions obtained by ATLAS. Cuts in addition
to the preselection cuts are given in the title of each distribution.
2
A: Preselection
0.25
≥
6j,
≥
2b
CheckMATE doublet
ATLAS doublet
0.40
0.20
0.35
Fraction of events
Fraction of events
B:
0.45
CheckMATE doublet
ATLAS doublet
0.15
0.10
0.05
0.30
0.25
0.20
0.15
0.10
0.05
0.00
4
6
8
10
jet multiplicity
C:
6j,
≥
0.00
16
2b
3
4
5
6
b-jet multiplicity
D:
≥
6j,
≥
7
8
9
2b
CheckMATE doublet
ATLAS doublet
0.4
0.06
0.04
0.02
0.3
0.2
0.1
0
50
100
150
200
250
large-R mass [GeV]
E: 1J,
0.14
≥
6j,
≥
300
350
0.0
400
4b
0.12
0
1
2
3
4
Mass-tagged jet multiplicity
F: 1J,
0.25
CheckMATE doublet
ATLAS doublet
≥
6j,
≥
5
6
4b, HM
CheckMATE doublet
ATLAS doublet
0.20
Fraction of events
0.10
0.08
0.06
0.04
0.15
0.10
0.05
0.02
0.00
2
0.5
CheckMATE doublet
ATLAS doublet
0.08
0.00
Fraction of events / 10 GeV
≥
14
Fraction of events
Fraction of events / 10 GeV
0.10
12
0
50
100
150
mbbmin∆R [GeV]
200
250
0.00
300
0
500
1000
1500
meff [GeV]
2000
2500
3000
Figure 2: Kinematic distributions for T T̄ doublet compared to distributions obtained by ATLAS. Cuts in addition
to the preselection cuts are given in the title of each distribution.
3