Generator

Details for Pythia 8.301 default vs. default-CD

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (default) Δ χ2+5% (default-CD)
Asymmetry
AC vs Mttbar
CMS_2016_I1430892 8000 0.80 +2.6 3.4
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 4.0 +6.0 10
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 2.5 +5.0 7.5
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 0.17 +1.2 1.4
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 0.46 +0.84 1.3
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 3.4 +5.8 9.2
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 0.64 - n/a
B jet
η
CMS_2018_I1703993 13000 15 +7.0 22
B jet
pT
CMS_2018_I1703993 13000 17 +7.0 24
bjbj.m
CMS_2018_I1703993 13000 21 +10 31
bjbj.pt
CMS_2018_I1703993 13000 18 +7.0 25
bjt.dphi
ATLAS_2022_I2037744 13000 1.4 -0.100 1.3
ej.pt
ATLAS_2022_I2037744 13000 2.3* -0.30 2.0
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 3.7 -1.9 1.8
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 3.5 -1.9 1.6
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 3.1 -1.8 1.3
ΔR(extra jets)
ATLAS_2020_I1801434 13000 3.6 -1.9 1.7
ejej.dphi
ATLAS_2022_I2037744 13000 0.96 -0.070 0.89
ejets.ht
CMS_2021_I1901295 13000 13 -1.0 12
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 2.9 -0.90 2.0
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 3.9 -2.4 1.5
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.082 +0.028 0.11
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.047 0 0.047
Jet mass
Jet mass
CMS_2017_I1518399 8000 5.2 -3.6 1.6
CMS_2019_I1764472 13000 0.28 +0.18 0.46
Jet pT
ATLAS_2014_I1304688 7000 6.7 +0.50 7.2
ATLAS_2019_I1718132 13000 7.3* -1.5 5.8*
Dijet
Δη
ATLAS_2019_I1718132 13000 7.5 -1.0 6.5
Dijet
Δφ
ATLAS_2019_I1718132 13000 8.9 +0.50 9.4
Dijet
HT
ATLAS_2019_I1718132 13000 7.1 -1.8 5.3
Jet mass
Dijet mass
ATLAS_2019_I1718132 13000 9.7 -0.70 9.0
Jet Shapes
Differential Jet Shape
ATLAS_2013_I1243871 7000 1.9 0 1.9
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.28 +0.0100 0.29
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 2.2 0 2.2
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.4 -0.20 1.2
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 2.0 +0.10 2.1
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 3.6 -0.80 2.8
Lepton η
ATLAS_2019_I1759875 13000 13 +2.0 15
CMS_2018_I1703993 13000 9.6 +3.4 13
Lepton pT
ATLAS_2019_I1759875 13000 17 +5.0 22
CMS_2018_I1703993 13000 17 +7.0 24
CMS_2021_I1901295 13000 5.9 +0.70 6.6
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.7 +0.70 5.4
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.67 +0.24 0.91
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 5.1 +1.9 7.0
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 10 -0.80 9.2
Dilepton
E
ATLAS_2019_I1759875 13000 15 +3.0 18
Dilepton
Δη
CMS_2016_I1430892 8000 0.57 +0.010 0.58
CMS_2018_I1703993 13000 12 +6.0 18
Dilepton
Δφ
ATLAS_2019_I1718132 13000 10 -3.1 6.9
ATLAS_2019_I1759875 13000 11 +2.0 13
CMS_2018_I1703993 13000 20 +5.0 25
Dilepton
HT
ATLAS_2019_I1759875 13000 13 +5.0 18
Dilepton
m
ATLAS_2019_I1759875 13000 15 +1.0 16
CMS_2018_I1703993 13000 20 +3.0 23
Dilepton
pT
ATLAS_2019_I1718132 13000 6.1 +2.1 8.2
ATLAS_2019_I1759875 13000 16 +5.0 21
CMS_2018_I1703993 13000 15 +6.0 21
Dilepton
y
ATLAS_2019_I1759875 13000 11 +1.0 12
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 2.6 -0.60 2.0
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 16 +1.0 17
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 5.7 -0.80 4.9
CMS_2018_I1703993 13000 13 +7.0 20
sumpt
ATLAS_2022_I2152933 13000 2.5 +0.60 3.1
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 4.1 +0.30 4.4
ATLAS_2020_I1801434 13000 3.5 +0.50 4.0
ATLAS_2022_I2077575 13000 2.9 -0.70 2.2
Top pT
ATLAS_2019_I1750330 13000 3.3* +0.40 3.7*
ATLAS_2020_I1801434 13000 3.7 -1.4 2.3
ATLAS_2022_I2037744 13000 1.0 +0.40 1.4
ATLAS_2022_I2077575 13000 2.4* -0.10 2.3*
CMS_2018_I1703993 13000 27 +2.0 29
CMS_2021_I1901295 13000 12* +1.0 13*
top.pt.ttbarRF
CMS_2018_I1703993 13000 27 +1.0 28
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 4.4 -1.6 2.8
Top rapidity
ATLAS_2019_I1750330 13000 3.8 +1.1 4.9
ATLAS_2020_I1801434 13000 4.1 -1.7 2.4
ATLAS_2022_I2037744 13000 1.4 -0.30 1.1
ATLAS_2022_I2077575 13000 2.4* -0.20 2.2*
CMS_2018_I1703993 13000 22 +3.0 25
CMS_2021_I1901295 13000 11 +1.0 12
topej.dphi
ATLAS_2022_I2037744 13000 1.9 +0.30 2.2
topej.m
ATLAS_2022_I2037744 13000 1.3 -0.82 0.48
χ(ttbar)
ATLAS_2019_I1750330 13000 4.3 +0.30 4.6
ATLAS_2020_I1801434 13000 4.4 -2.0 2.4
ATLAS_2022_I2077575 13000 4.1* -1.6 2.5
Δφ(ttbar)
ATLAS_2019_I1750330 13000 5.4 -0.50 4.9
ATLAS_2020_I1801434 13000 4.9 -0.20 4.7
ATLAS_2022_I2037744 13000 1.8 -1.0 0.79
ATLAS_2022_I2077575 13000 3.5 -0.70 2.8
CMS_2018_I1703993 13000 34 +7.0 41
CMS_2021_I1901295 13000 18 +2.0 20
Δy (ttbar)
CMS_2016_I1430892 8000 0.075 +0.27 0.34
CMS_2018_I1703993 13000 23 +2.0 25
CMS_2021_I1901295 13000 11 +1.0 12
ttbar HT
ATLAS_2019_I1750330 13000 3.2 +0.40 3.6
ATLAS_2020_I1801434 13000 3.2 -1.3 1.9
ATLAS_2022_I2037744 13000 0.93 +0.17 1.1
ATLAS_2022_I2077575 13000 4.6* -2.5 2.1
CMS_2021_I1901295 13000 10 +1.0 11
m(ttbar)
ATLAS_2019_I1750330 13000 2.8* +0.80 3.6*
ATLAS_2020_I1801434 13000 3.8 -1.5 2.3
ATLAS_2022_I2037744 13000 0.63 +2.6 3.2
ATLAS_2022_I2077575 13000 2.1* -0.20 1.9*
CMS_2018_I1703993 13000 25 -1.0 24
CMS_2021_I1901295 13000 17 -1.0 16
Pcrossttbar
ATLAS_2020_I1801434 13000 5.4 -2.7 2.7
ttbar pT
ATLAS_2019_I1750330 13000 4.7* -0.30 4.4
ATLAS_2020_I1801434 13000 3.7 -0.50 3.2*
ATLAS_2022_I2037744 13000 1.6 -1.1 0.46
ATLAS_2022_I2077575 13000 2.2* -0.10 2.1
CMS_2018_I1703993 13000 23 +4.0 27
CMS_2021_I1901295 13000 12* 0 12
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 2.8 +0.60 3.4
ttbar.thetaStar
ATLAS_2022_I2077575 13000 3.1 +0.90 4.0*
CMS_2021_I1901295 13000 17 -1.0 16
Ttbar rapidity
ATLAS_2019_I1750330 13000 3.7 +1.0 4.7
ATLAS_2020_I1801434 13000 2.9 -0.90 2.0
ATLAS_2022_I2037744 13000 0.56 - n/a
ATLAS_2022_I2077575 13000 2.5 +0.20 2.7
CMS_2018_I1703993 13000 23 +1.0 24
CMS_2021_I1901295 13000 15 -1.0 14
Mean rapidity
ATLAS_2019_I1750330 13000 5.7 +0.70 6.4
ATLAS_2020_I1801434 13000 3.5 -1.8 1.7
ATLAS_2022_I2077575 13000 2.9 -0.50 2.4
ttbarej.ht
ATLAS_2022_I2037744 13000 1.3 -0.45 0.85
ttbarej.m
CMS_2021_I1901295 13000 12 +2.0 14
pT ratio
W to b
ATLAS_2020_I1801434 13000 3.7 -1.7 2.0
pT ratio
W to top
ATLAS_2020_I1801434 13000 4.0 -1.7 2.3
Cross sections
ATLAS_2022_I2037744 13000 0.0012 +0.016 0.017
ATLAS_2022_I2077575 13000 17 -2.0 15
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.