Generator

Details for Pythia 8.306 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 2.6 -2.2 0.38
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 13 -2.0 11
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 5.1 -3.3 1.8
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 4.2 -0.50 3.7
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 3.0 -2.2 0.82
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 2.0 -0.80 1.2
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 n/a - 1.5
B jet
 η
 CMS_2018_I1703993 13000 20 0 20
B jet
 pT
 CMS_2018_I1703993 13000 25 -4.0 21
bjbj.m
 CMS_2018_I1703993 13000 30 -4.0 26
bjbj.pt
 CMS_2018_I1703993 13000 25 -1.0 24
bjt.dphi
 ATLAS_2022_I2037744 13000 1.1 +0.100 1.2
ej.pt
 ATLAS_2022_I2037744 13000 2.2 +0.20 2.4*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 1.5 +0.10 1.6
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 2.6 -0.70 1.9
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 2.8 -1.5 1.3
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 1.8 -0.30 1.5
ejej.dphi
 ATLAS_2022_I2037744 13000 0.68 -0.10 0.58
ejets.ht
 CMS_2021_I1901295 13000 9.8 +1.2 11
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.8 -1.2 2.6
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.2 -0.70 1.5
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.24 -0.050 0.19
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.098 -0.0050 0.093
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 2.3 -0.90 1.4
CMS_2019_I1764472 13000 0.27 +0.44 0.71
Jet pT
 ATLAS_2014_I1304688 7000 6.6 -0.30 6.3
ATLAS_2019_I1718132 13000 5.0* - n/a
Dijet
 Δη
 ATLAS_2019_I1718132 13000 5.2 +4.0 9.2*
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 6.5 +5.5 12
Dijet
 HT
 ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 8.9 +3.1 12
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 2.1 +0.20 2.3
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.32 +0.070 0.39
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.3 -0.30 2.0
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.7 -0.40 1.3
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.5 -0.50 2.0
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.7 -0.50 3.2
Lepton η
 ATLAS_2019_I1759875 13000 15 -1.0 14
CMS_2018_I1703993 13000 13 -1.0 12
Lepton pT
 ATLAS_2019_I1759875 13000 20 -1.0 19
CMS_2018_I1703993 13000 23 -1.0 22
CMS_2021_I1901295 13000 5.8 +0.80 6.6
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 4.3 +0.70 5.0
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.71 +0.15 0.86
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 4.9 +2.0 6.9
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 9.7* +5.3 15*
Dilepton
 E
 ATLAS_2019_I1759875 13000 17 -1.0 16
Dilepton
 Δη
 CMS_2016_I1430892 8000 0.49 -0.11 0.38
CMS_2018_I1703993 13000 17 0 17
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 7.2 +2.8 10*
ATLAS_2019_I1759875 13000 14* -2.0 12*
CMS_2018_I1703993 13000 27 -6.0 21
Dilepton
 HT
 ATLAS_2019_I1759875 13000 17 -1.0 16
Dilepton
 m
 ATLAS_2019_I1759875 13000 15 -2.0 13
CMS_2018_I1703993 13000 21 -2.0 19
Dilepton
 pT
 ATLAS_2019_I1718132 13000 4.9 +2.7 7.6
ATLAS_2019_I1759875 13000 18 -2.0 16
CMS_2018_I1703993 13000 22 -4.0 18
Dilepton
 y
 ATLAS_2019_I1759875 13000 14* -2.0 12*
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 1.4 +0.80 2.2
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 13 +2.0 15
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 4.9 -2.2 2.7
CMS_2018_I1703993 13000 18 -2.0 16
sumpt
 ATLAS_2022_I2152933 13000 1.8 +1.4 3.2
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 4.0 +0.50 4.5
ATLAS_2020_I1801434 13000 4.1 -1.9 2.2
ATLAS_2022_I2077575 13000 5.2* -2.5 2.7
Top pT
 ATLAS_2019_I1750330 13000 3.2* +0.70 3.9*
ATLAS_2020_I1801434 13000 3.3 -1.3 2.0
ATLAS_2022_I2037744 13000 0.86 +1.2 2.1
ATLAS_2022_I2077575 13000 2.3* +0.30 2.6*
CMS_2018_I1703993 13000 28 -2.0 26
CMS_2021_I1901295 13000 12 +2.0 14*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 28 -3.0 25
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 3.9 -1.0 2.9
Top rapidity
 ATLAS_2019_I1750330 13000 3.6 +0.70 4.3
ATLAS_2020_I1801434 13000 3.5 -0.40 3.1
ATLAS_2022_I2037744 13000 0.90* +0.40 1.3
ATLAS_2022_I2077575 13000 3.1* -0.10 3.0*
CMS_2018_I1703993 13000 24 0 24
CMS_2021_I1901295 13000 11 +1.0 12
topej.dphi
 ATLAS_2022_I2037744 13000 2.2 +0.100 2.3
topej.m
 ATLAS_2022_I2037744 13000 0.98 +0.42 1.4
χ(ttbar)
 ATLAS_2019_I1750330 13000 4.3 +0.40 4.7
ATLAS_2020_I1801434 13000 3.6 +0.20 3.8
ATLAS_2022_I2077575 13000 4.9* +0.100 5.0*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 4.4 +1.3 5.7
ATLAS_2020_I1801434 13000 4.5 -1.8 2.7
ATLAS_2022_I2037744 13000 1.3 -0.69 0.61
ATLAS_2022_I2077575 13000 3.5 +0.50 4.0
CMS_2018_I1703993 13000 39 -1.0 38
CMS_2021_I1901295 13000 19 +2.0 21
Δy (ttbar)
 CMS_2016_I1430892 8000 0.33 -0.23 0.097
CMS_2018_I1703993 13000 24 +1.0 25
CMS_2021_I1901295 13000 11 +3.0 14*
ttbar HT
 ATLAS_2019_I1750330 13000 3.2 +0.50 3.7
ATLAS_2020_I1801434 13000 3.1 -1.3 1.8
ATLAS_2022_I2037744 13000 n/a - 1.3
ATLAS_2022_I2077575 13000 3.1 +2.5 5.6*
CMS_2021_I1901295 13000 9.9 +2.1 12
m(ttbar)
 ATLAS_2019_I1750330 13000 3.0* +1.0 4.0*
ATLAS_2020_I1801434 13000 4.0 -1.9 2.1
ATLAS_2022_I2037744 13000 0.63 +0.47 1.1
ATLAS_2022_I2077575 13000 2.4* -0.10 2.3*
CMS_2018_I1703993 13000 27 -3.0 24
CMS_2021_I1901295 13000 15 +2.0 17
Pcrossttbar
 ATLAS_2020_I1801434 13000 3.7 -1.5 2.2
ttbar pT
 ATLAS_2019_I1750330 13000 3.8 +0.70 4.5
ATLAS_2020_I1801434 13000 3.9 -1.9 2.0
ATLAS_2022_I2037744 13000 0.63 -0.28 0.35
ATLAS_2022_I2077575 13000 2.6* +0.40 3.0*
CMS_2018_I1703993 13000 26 +1.0 27
CMS_2021_I1901295 13000 10 +2.0 12
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.9 -3.1 1.8
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 5.2* +0.30 5.5*
CMS_2021_I1901295 13000 16 +2.0 18
Ttbar rapidity
 ATLAS_2019_I1750330 13000 3.8 +0.40 4.2
ATLAS_2020_I1801434 13000 2.9 -1.2 1.7
ATLAS_2022_I2037744 13000 1.2 -0.100 1.1
ATLAS_2022_I2077575 13000 5.6* -2.0 3.6
CMS_2018_I1703993 13000 24 -1.0 23
CMS_2021_I1901295 13000 14 +1.0 15
Mean rapidity
 ATLAS_2019_I1750330 13000 5.7 +0.50 6.2
ATLAS_2020_I1801434 13000 3.4 -1.5 1.9
ATLAS_2022_I2077575 13000 5.7* -2.3 3.4
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.0 +0.40 2.4
ttbarej.m
 CMS_2021_I1901295 13000 11 +1.0 12
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 3.1 -0.90 2.2
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.0 -1.6 2.4
Cross sections
 ATLAS_2022_I2037744 13000 1.1 +0.30 1.4
ATLAS_2022_I2077575 13000 21 +2.0 23
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.