Generator

Details for Pythia 6.423 default vs. a

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (default) Δ χ2+5% (a)
Asymmetry
AC vs Mttbar
CMS_2016_I1430892 8000 n/a - n/a
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 n/a - n/a
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 n/a - n/a
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 n/a - n/a
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 n/a - n/a
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 n/a - n/a
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 0.13 +0.80 0.93
B jet
η
CMS_2018_I1703993 13000 140 -10 130
B jet
pT
CMS_2018_I1703993 13000 170 -10 160
bjbj.m
CMS_2018_I1703993 13000 210 -20 190
bjbj.pt
CMS_2018_I1703993 13000 190 -20 170
bjt.dphi
ATLAS_2022_I2037744 13000 1.3 +0.70 2.0
ej.pt
ATLAS_2022_I2037744 13000 3.6* -0.40 3.2
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 9.5 -2.0 7.5
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 8.8 -1.8 7.0
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 8.0 -0.60 7.4
ΔR(extra jets)
ATLAS_2020_I1801434 13000 n/a - 6.2
ejej.dphi
ATLAS_2022_I2037744 13000 0.78 +0.52 1.3
ejets.ht
CMS_2021_I1901295 13000 31 0 31
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 8.2 -2.5 5.7
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 7.4 -0.90 6.5
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.17 -0.060 0.11
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.059 0 0.059
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 2.8 -0.50 2.3
Jet pT
ATLAS_2014_I1304688 7000 28 +1.0 29
ATLAS_2019_I1718132 13000 n/a - n/a
Dijet
Δη
ATLAS_2019_I1718132 13000 n/a - n/a
Dijet
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
Dijet
HT
ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
Dijet mass
ATLAS_2019_I1718132 13000 n/a - n/a
Jet Shapes
Differential Jet Shape
ATLAS_2013_I1243871 7000 1.1 +0.100 1.2
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.19 +0.020 0.21
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.5 -0.30 1.2
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.92 -0.070 0.85
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.6 -0.40 1.2
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.2 -0.60 1.6
Lepton η
ATLAS_2019_I1759875 13000 39 -2.0 37
CMS_2018_I1703993 13000 81 -3.0 78
Lepton pT
ATLAS_2019_I1759875 13000 53 -1.0 52
CMS_2018_I1703993 13000 170 -10 160
CMS_2021_I1901295 13000 18 +1.0 19
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.7 +1.6 6.3
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.58 -0.11 0.47
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 4.9 +1.7 6.6
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 44 -2.0 42
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 120 -10 110
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 30 +1.0 31*
CMS_2018_I1703993 13000 140 -20 120
Dilepton
HT
ATLAS_2019_I1759875 13000 44 -1.0 43
Dilepton
m
ATLAS_2019_I1759875 13000 42 -4.0 38
CMS_2018_I1703993 13000 150 -10 140
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 46 0 46
CMS_2018_I1703993 13000 140 -10 130
Dilepton
y
ATLAS_2019_I1759875 13000 31 -2.0 29
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 20 -12 8.2
Jet Multiplicities
Extra jets multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
ATLAS_2022_I2037744 13000 n/a - n/a
CMS_2021_I1901295 13000 40 +5.0 45
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 12 -2.7 9.3
CMS_2018_I1703993 13000 160 -20 140
sumpt
ATLAS_2022_I2152933 13000 21 -7.0 14
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 9.1 +0.20 9.3
ATLAS_2020_I1801434 13000 8.0* -0.80 7.2*
ATLAS_2022_I2077575 13000 1.5* +0.70 2.2
Top pT
ATLAS_2019_I1750330 13000 6.9 +0.70 7.6
ATLAS_2020_I1801434 13000 7.1 -1.1 6.0
ATLAS_2022_I2037744 13000 1.5 +0.70 2.2
ATLAS_2022_I2077575 13000 1.4* +0.10 1.5*
CMS_2018_I1703993 13000 170 -10 160
CMS_2021_I1901295 13000 35* +1.0 36
top.pt.ttbarRF
CMS_2018_I1703993 13000 180 -20 160
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 11 -3.2 7.8
Top rapidity
ATLAS_2019_I1750330 13000 8.9 0 8.9
ATLAS_2020_I1801434 13000 9.2 -1.8 7.4
ATLAS_2022_I2037744 13000 1.2 +0.60 1.8*
ATLAS_2022_I2077575 13000 1.8* -0.10 1.7*
CMS_2018_I1703993 13000 150 -10 140
CMS_2021_I1901295 13000 32 +1.0 33
topej.dphi
ATLAS_2022_I2037744 13000 3.0 -0.10 2.9
topej.m
ATLAS_2022_I2037744 13000 1.1 +1.1 2.2
χ(ttbar)
ATLAS_2019_I1750330 13000 10 0 10
ATLAS_2020_I1801434 13000 9.3 -0.90 8.4
ATLAS_2022_I2077575 13000 2.1* +0.60 2.7*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 8.9 +0.100 9.0
ATLAS_2020_I1801434 13000 9.1 -1.7 7.4
ATLAS_2022_I2037744 13000 2.2 0 2.2
ATLAS_2022_I2077575 13000 2.1 +0.10 2.2
CMS_2018_I1703993 13000 290 -20 270
CMS_2021_I1901295 13000 50 -1.0 49
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 160 0 160
CMS_2021_I1901295 13000 36 0 36
ttbar HT
ATLAS_2019_I1750330 13000 7.2 +0.100 7.3
ATLAS_2020_I1801434 13000 8.4 -1.8 6.6
ATLAS_2022_I2037744 13000 0.96 +1.8 2.8
ATLAS_2022_I2077575 13000 1.3 +0.30 1.6
CMS_2021_I1901295 13000 30 +1.0 31
m(ttbar)
ATLAS_2019_I1750330 13000 5.6 +1.2 6.8*
ATLAS_2020_I1801434 13000 8.4 -1.4 7.0
ATLAS_2022_I2037744 13000 1.6 +0.40 2.0
ATLAS_2022_I2077575 13000 1.4* 0 1.4*
CMS_2018_I1703993 13000 200* -40 160
CMS_2021_I1901295 13000 48* 0 48
Pcrossttbar
ATLAS_2020_I1801434 13000 9.0 -1.9 7.1
ttbar pT
ATLAS_2019_I1750330 13000 8.3 +0.50 8.8
ATLAS_2020_I1801434 13000 7.9 -1.6 6.3*
ATLAS_2022_I2037744 13000 1.8 +1.1 2.9
ATLAS_2022_I2077575 13000 2.0* -0.10 1.9*
CMS_2018_I1703993 13000 210 -20 190
CMS_2021_I1901295 13000 30 0 30
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 7.8 -1.2 6.6
ttbar.thetaStar
ATLAS_2022_I2077575 13000 1.8 +1.5 3.3*
CMS_2021_I1901295 13000 48 0 48
Ttbar rapidity
ATLAS_2019_I1750330 13000 8.0 +0.50 8.5
ATLAS_2020_I1801434 13000 6.8* -1.9 4.9
ATLAS_2022_I2037744 13000 1.2 0 1.2
ATLAS_2022_I2077575 13000 2.4* -0.60 1.8
CMS_2018_I1703993 13000 130 0 130
CMS_2021_I1901295 13000 43 0 43
Mean rapidity
ATLAS_2019_I1750330 13000 12 0 12
ATLAS_2020_I1801434 13000 8.3 -2.5 5.8
ATLAS_2022_I2077575 13000 2.6* -0.90 1.7
ttbarej.ht
ATLAS_2022_I2037744 13000 3.4 +1.0 4.4
ttbarej.m
CMS_2021_I1901295 13000 37 -1.0 36
pT ratio
W to b
ATLAS_2020_I1801434 13000 8.2* -1.4 6.8
pT ratio
W to top
ATLAS_2020_I1801434 13000 9.0 -2.2 6.8
Cross sections
ATLAS_2022_I2037744 13000 2.4 +4.4 6.8
ATLAS_2022_I2077575 13000 5.0 +1.4 6.4
CMS_2019_I1753720 13000 n/a - n/a

* several "n/a" histograms were excluded from the calculation



n/a indicates that the χ2 value is unavailable, typically due to mismatched binning between theoretical and MC histograms or other issues.



The page data is based on 2224 histograms.