Generator

Details for Pythia 8.307 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 0.57 -0.020 0.55
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 7.0 +4.0 11
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 0.49 +1.1 1.6
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 0.55 +4.1 4.6
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 0.76 +0.16 0.92
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 3.8 -2.7 1.1
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 0.92 -0.38 0.54
B jet
 η
 CMS_2018_I1703993 13000 19 -2.0 17
B jet
 pT
 CMS_2018_I1703993 13000 23 -3.0 20
bjbj.m
 CMS_2018_I1703993 13000 26 -2.0 24
bjbj.pt
 CMS_2018_I1703993 13000 23 -2.0 21
bjt.dphi
 ATLAS_2022_I2037744 13000 1.1 -0.57 0.53
ej.pt
 ATLAS_2022_I2037744 13000 2.4* -0.10 2.3
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.9 -2.0 1.9
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.0 -2.4 1.6
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.1 -2.6 1.5
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.1 -2.1 1.0
ejej.dphi
 ATLAS_2022_I2037744 13000 0.65 0 0.65
ejets.ht
 CMS_2021_I1901295 13000 11 +1.0 12
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.4 0 3.4
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.5 -2.2 1.3
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.48 -0.37 0.11
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.17 -0.13 0.043
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 4.8 -1.8 3.0
CMS_2019_I1764472 13000 0.25 +0.34 0.59
Jet pT
 ATLAS_2014_I1304688 7000 6.5 +0.20 6.7
ATLAS_2019_I1718132 13000 5.0* - n/a
Dijet
 Δη
 ATLAS_2019_I1718132 13000 5.3 +0.50 5.8
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 5.8 +2.2 8.0
Dijet
 HT
 ATLAS_2019_I1718132 13000 4.7 - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 7.4 +2.6 10
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 2.4 -0.60 1.8
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.35 -0.060 0.29
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.1 -0.10 2.0
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.3 -0.10 1.2
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.3 -0.40 1.9
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.9 -0.30 2.6
Lepton η
 ATLAS_2019_I1759875 13000 13 +1.0 14
CMS_2018_I1703993 13000 12 -1.0 11
Lepton pT
 ATLAS_2019_I1759875 13000 18 0 18
CMS_2018_I1703993 13000 22 -2.0 20
CMS_2021_I1901295 13000 6.8 +0.10 6.9
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 5.1 -0.20 4.9
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.69 +0.010 0.70
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 6.5 -0.20 6.3
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 8.3 +2.7 11*
Dilepton
 E
 ATLAS_2019_I1759875 13000 15 +2.0 17
Dilepton
 Δη
 CMS_2016_I1430892 8000 0.90 -0.44 0.46
CMS_2018_I1703993 13000 16 -1.0 15
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 6.3 +1.4 7.7
ATLAS_2019_I1759875 13000 12* -1.0 11
CMS_2018_I1703993 13000 26 -6.0 20
Dilepton
 HT
 ATLAS_2019_I1759875 13000 14 +1.0 15
Dilepton
 m
 ATLAS_2019_I1759875 13000 12 +3.0 15
CMS_2018_I1703993 13000 21 0 21
Dilepton
 pT
 ATLAS_2019_I1718132 13000 5.5 +1.0 6.5
ATLAS_2019_I1759875 13000 15 +1.0 16
CMS_2018_I1703993 13000 19 -3.0 16
Dilepton
 y
 ATLAS_2019_I1759875 13000 11 0 11
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 3.3 -2.2 1.1
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 14 0 14
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 4.6 -0.70 3.9
CMS_2018_I1703993 13000 18 -2.0 16
sumpt
 ATLAS_2022_I2152933 13000 4.9 -1.6 3.3
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 4.3 +0.40 4.7
ATLAS_2020_I1801434 13000 3.0 +0.80 3.8
ATLAS_2022_I2077575 13000 2.3 +0.60 2.9
Top pT
 ATLAS_2019_I1750330 13000 3.1 +0.70 3.8*
ATLAS_2020_I1801434 13000 3.2 -0.20 3.0
ATLAS_2022_I2037744 13000 1.4 -0.40 1.0
ATLAS_2022_I2077575 13000 2.0* +0.30 2.3*
CMS_2018_I1703993 13000 29 -1.0 28
CMS_2021_I1901295 13000 13* +1.0 14*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 28 -2.0 26
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.2 -2.0 3.2
Top rapidity
 ATLAS_2019_I1750330 13000 3.9 +0.60 4.5
ATLAS_2020_I1801434 13000 4.1 -1.4 2.7
ATLAS_2022_I2037744 13000 1.4 -0.67 0.73
ATLAS_2022_I2077575 13000 2.3* +0.20 2.5*
CMS_2018_I1703993 13000 24 -1.0 23
CMS_2021_I1901295 13000 12 +1.0 13
topej.dphi
 ATLAS_2022_I2037744 13000 2.1 +1.4 3.5
topej.m
 ATLAS_2022_I2037744 13000 1.2 -0.100 1.1
χ(ttbar)
 ATLAS_2019_I1750330 13000 4.4 +0.30 4.7
ATLAS_2020_I1801434 13000 4.1 +0.40 4.5
ATLAS_2022_I2077575 13000 2.8 +1.3 4.1*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 4.6 +1.2 5.8
ATLAS_2020_I1801434 13000 3.5 +0.30 3.8
ATLAS_2022_I2037744 13000 1.5 +1.6 3.1
ATLAS_2022_I2077575 13000 2.8 +0.30 3.1
CMS_2018_I1703993 13000 39 -4.0 35
CMS_2021_I1901295 13000 19 +3.0 22
Δy (ttbar)
 CMS_2016_I1430892 8000 0.32 +0.050 0.37
CMS_2018_I1703993 13000 24 +2.0 26
CMS_2021_I1901295 13000 11 +2.0 13
ttbar HT
 ATLAS_2019_I1750330 13000 3.4 +0.40 3.8
ATLAS_2020_I1801434 13000 3.5 -1.3 2.2
ATLAS_2022_I2037744 13000 5.9 -5.3 0.65
ATLAS_2022_I2077575 13000 2.6 +1.4 4.0*
CMS_2021_I1901295 13000 11 +1.0 12
m(ttbar)
 ATLAS_2019_I1750330 13000 2.9 +0.70 3.6*
ATLAS_2020_I1801434 13000 3.4 -0.60 2.8
ATLAS_2022_I2037744 13000 1.7 -0.85 0.85
ATLAS_2022_I2077575 13000 2.0 0 2.0*
CMS_2018_I1703993 13000 23 -1.0 22
CMS_2021_I1901295 13000 16 +2.0 18
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.3 -1.5 2.8
ttbar pT
 ATLAS_2019_I1750330 13000 4.2 +0.40 4.6
ATLAS_2020_I1801434 13000 3.3 -0.100 3.2
ATLAS_2022_I2037744 13000 1.9 -0.50 1.4
ATLAS_2022_I2077575 13000 2.0* +0.50 2.5*
CMS_2018_I1703993 13000 23 -1.0 22
CMS_2021_I1901295 13000 11* +3.0 14
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.2 -2.7 2.5
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.7 +0.100 2.8
CMS_2021_I1901295 13000 16 +3.0 19
Ttbar rapidity
 ATLAS_2019_I1750330 13000 3.9 +0.40 4.3
ATLAS_2020_I1801434 13000 3.2 -0.70 2.5
ATLAS_2022_I2037744 13000 0.40 +0.16 0.56
ATLAS_2022_I2077575 13000 2.4 +0.30 2.7
CMS_2018_I1703993 13000 23 0 23
CMS_2021_I1901295 13000 15 +2.0 17
Mean rapidity
 ATLAS_2019_I1750330 13000 5.8 +1.0 6.8
ATLAS_2020_I1801434 13000 4.7 -2.5 2.2
ATLAS_2022_I2077575 13000 2.3 +0.70 3.0
ttbarej.ht
 ATLAS_2022_I2037744 13000 1.2 0 1.2
ttbarej.m
 CMS_2021_I1901295 13000 12 +2.0 14
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 3.7 -1.4 2.3
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.1 -1.8 2.3
Cross sections
 ATLAS_2022_I2037744 13000 0.11 +0.17 0.28
ATLAS_2022_I2077575 13000 17 -1.0 16
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.