Generator

Details for Pythia 8.235 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 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 n/a - 0.76
B jet
 η
 CMS_2018_I1703993 13000 22 -1.0 21
B jet
 pT
 CMS_2018_I1703993 13000 27 -1.0 26
bjbj.m
 CMS_2018_I1703993 13000 34 -2.0 32
bjbj.pt
 CMS_2018_I1703993 13000 27 -1.0 26
bjt.dphi
 ATLAS_2022_I2037744 13000 0.83 +1.5 2.3
ej.pt
 ATLAS_2022_I2037744 13000 2.0* +0.40 2.4
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.1 -1.6 1.5
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 2.9 -1.4 1.5
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.1 -1.4 1.7
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.6* -2.3 1.3
ejej.dphi
 ATLAS_2022_I2037744 13000 1.0 +0.20 1.2
ejets.ht
 CMS_2021_I1901295 13000 11 +2.0 13
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.5 -2.5 2.0
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.8 -1.1 1.7
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.21 +0.14 0.35
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.064 +0.046 0.11
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.41 +0.29 0.70
Jet pT
 ATLAS_2014_I1304688 7000 6.6 -0.40 6.2
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 2.2 -0.10 2.1
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.33 -0.020 0.31
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.7 +0.40 2.1
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.1 +0.20 1.3
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.7 +0.10 1.8
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.3 +0.70 3.0
Lepton η
 ATLAS_2019_I1759875 13000 14 +1.0 15
CMS_2018_I1703993 13000 15 -2.0 13
Lepton pT
 ATLAS_2019_I1759875 13000 19 +2.0 21
CMS_2018_I1703993 13000 25 0 25
CMS_2021_I1901295 13000 6.3 -0.40 5.9
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 5.7 -0.60 5.1
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.81 +0.040 0.85
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.2 -0.80 6.4
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 16 +4.0 20
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 19 -1.0 18
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 12 +3.0 15*
CMS_2018_I1703993 13000 30 -4.0 26
Dilepton
 HT
 ATLAS_2019_I1759875 13000 17 0 17
Dilepton
 m
 ATLAS_2019_I1759875 13000 15 +2.0 17
CMS_2018_I1703993 13000 24 +2.0 26
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 16 +2.0 18
CMS_2018_I1703993 13000 23 -1.0 22
Dilepton
 y
 ATLAS_2019_I1759875 13000 11 +2.0 13
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 0.94 +0.86 1.8
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 -4.0 12
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 3.4 -0.70 2.7
CMS_2018_I1703993 13000 20 -1.0 19
sumpt
 ATLAS_2022_I2152933 13000 2.8 +1.0 3.8
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 4.2 -0.30 3.9
ATLAS_2020_I1801434 13000 2.0 +0.60 2.6
ATLAS_2022_I2077575 13000 2.1 +2.1 4.2*
Top pT
 ATLAS_2019_I1750330 13000 3.7* -0.20 3.5*
ATLAS_2020_I1801434 13000 2.2 -0.20 2.0
ATLAS_2022_I2037744 13000 1.4 +1.0 2.4*
ATLAS_2022_I2077575 13000 2.1* +0.10 2.2*
CMS_2018_I1703993 13000 33 -1.0 32
CMS_2021_I1901295 13000 13* -1.0 12*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 32 -2.0 30
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 3.3 -1.0 2.3
Top rapidity
 ATLAS_2019_I1750330 13000 4.1 -0.40 3.7
ATLAS_2020_I1801434 13000 2.8 +0.80 3.6
ATLAS_2022_I2037744 13000 0.74 +0.050 0.79*
ATLAS_2022_I2077575 13000 2.1 +0.20 2.3*
CMS_2018_I1703993 13000 28 -1.0 27
CMS_2021_I1901295 13000 11 0 11
topej.dphi
 ATLAS_2022_I2037744 13000 2.8 -0.70 2.1
topej.m
 ATLAS_2022_I2037744 13000 0.85 -0.17 0.68
χ(ttbar)
 ATLAS_2019_I1750330 13000 4.5 -0.20 4.3
ATLAS_2020_I1801434 13000 2.8 0 2.8
ATLAS_2022_I2077575 13000 2.1 +0.40 2.5
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 4.9 0 4.9
ATLAS_2020_I1801434 13000 3.1 -0.70 2.4
ATLAS_2022_I2037744 13000 n/a - 6.8
ATLAS_2022_I2077575 13000 2.5 +0.80 3.3
CMS_2018_I1703993 13000 49 -8.0 41
CMS_2021_I1901295 13000 20 -1.0 19
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 29 -2.0 27
CMS_2021_I1901295 13000 11 0 11
ttbar HT
 ATLAS_2019_I1750330 13000 3.3 -0.100 3.2
ATLAS_2020_I1801434 13000 3.1 -1.4 1.7
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 n/a - 3.2
CMS_2021_I1901295 13000 n/a - 9.9
m(ttbar)
 ATLAS_2019_I1750330 13000 2.9 +0.30 3.2*
ATLAS_2020_I1801434 13000 2.1 +0.50 2.6
ATLAS_2022_I2037744 13000 n/a - 1.3
ATLAS_2022_I2077575 13000 1.8* +0.100 1.9*
CMS_2018_I1703993 13000 29 -3.0 26
CMS_2021_I1901295 13000 15 0 15
Pcrossttbar
 ATLAS_2020_I1801434 13000 3.9 -1.5 2.4
ttbar pT
 ATLAS_2019_I1750330 13000 4.1 +0.50 4.6*
ATLAS_2020_I1801434 13000 2.6 -0.30 2.3*
ATLAS_2022_I2037744 13000 0.55 +2.0 2.5
ATLAS_2022_I2077575 13000 1.9* +0.20 2.1
CMS_2018_I1703993 13000 30 -3.0 27
CMS_2021_I1901295 13000 11 -1.0 10*
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 3.1 -1.1 2.0
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.5 -0.20 2.3
CMS_2021_I1901295 13000 17 -1.0 16
Ttbar rapidity
 ATLAS_2019_I1750330 13000 4.0 -0.20 3.8
ATLAS_2020_I1801434 13000 1.7 +0.80 2.5
ATLAS_2022_I2037744 13000 0.80 -0.43 0.37
ATLAS_2022_I2077575 13000 3.6 +0.50 4.1*
CMS_2018_I1703993 13000 27 -1.0 26
CMS_2021_I1901295 13000 15 0 15
Mean rapidity
 ATLAS_2019_I1750330 13000 5.9 -0.20 5.7
ATLAS_2020_I1801434 13000 2.7 -0.40 2.3
ATLAS_2022_I2077575 13000 2.3 +1.9 4.2*
ttbarej.ht
 ATLAS_2022_I2037744 13000 0.90 +0.050 0.95
ttbarej.m
 CMS_2021_I1901295 13000 12 0 12
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 2.4 -0.40 2.0
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 3.5 -1.0 2.5
Cross sections
 ATLAS_2022_I2037744 13000 0.22 +0.11 0.33
ATLAS_2022_I2077575 13000 14 +3.0 17
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.