Generator

Details for Pythia 8.240 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 0.34 - n/a
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 3.9 - n/a
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 1.0 - n/a
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 3.7 - n/a
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 2.2 - n/a
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 2.6 - n/a
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 1.5 -0.40 1.1
B jet
η
CMS_2018_I1703993 13000 17 +1.0 18
B jet
pT
CMS_2018_I1703993 13000 21 0 21
bjbj.m
CMS_2018_I1703993 13000 26 -1.0 25
bjbj.pt
CMS_2018_I1703993 13000 20 +6.0 26
bjt.dphi
ATLAS_2022_I2037744 13000 2.4 -1.8 0.58
ej.pt
ATLAS_2022_I2037744 13000 2.3* -0.50 1.8*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 2.7 -0.10 2.6
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 3.0 -0.30 2.7
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 3.0 0 3.0
ΔR(extra jets)
ATLAS_2020_I1801434 13000 2.6 +0.10 2.7
ejej.dphi
ATLAS_2022_I2037744 13000 1.3 +2.4 3.7
ejets.ht
CMS_2021_I1901295 13000 14 -3.0 11
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 2.1 +0.30 2.4
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 2.6 -0.30 2.3
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.12 +0.17 0.29
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.039 +0.071 0.11
Jet mass
Jet mass
CMS_2017_I1518399 8000 2.5 - n/a
CMS_2019_I1764472 13000 0.032 +0.0060 0.038
Jet pT
ATLAS_2014_I1304688 7000 7.5 -0.70 6.8
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 2.1 -0.10 2.0
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.30 0 0.30
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 2.2 -0.10 2.1
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.5 -0.10 1.4
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 2.2 0 2.2
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 3.5 -0.20 3.3
Lepton η
ATLAS_2019_I1759875 13000 10 +3.0 13
CMS_2018_I1703993 13000 11 +1.0 12
Lepton pT
ATLAS_2019_I1759875 13000 14 +4.0 18
CMS_2018_I1703993 13000 19 +2.0 21
CMS_2021_I1901295 13000 5.8 +1.0 6.8
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 5.2 -0.30 4.9
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.80 0 0.80
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 6.2 -0.10 6.1
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 11 +4.0 15
Dilepton
Δη
CMS_2016_I1430892 8000 0.56 - n/a
CMS_2018_I1703993 13000 15 0 15
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 9.9 +3.1 13*
CMS_2018_I1703993 13000 17 +6.0 23
Dilepton
HT
ATLAS_2019_I1759875 13000 11 +4.0 15
Dilepton
m
ATLAS_2019_I1759875 13000 11 +3.0 14
CMS_2018_I1703993 13000 17 +4.0 21
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 12 +3.0 15
CMS_2018_I1703993 13000 16 +3.0 19
Dilepton
y
ATLAS_2019_I1759875 13000 8.7 +2.3 11
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 2.0 +0.30 2.3
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 +1.0 14
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 4.2 -0.40 3.8
CMS_2018_I1703993 13000 15 +3.0 18
sumpt
ATLAS_2022_I2152933 13000 3.7 +0.20 3.9
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 4.3 0 4.3
ATLAS_2020_I1801434 13000 2.5 +0.70 3.2
ATLAS_2022_I2077575 13000 2.5 +1.1 3.6
Top pT
ATLAS_2019_I1750330 13000 3.5* +0.90 4.4*
ATLAS_2020_I1801434 13000 2.3 +0.30 2.6
ATLAS_2022_I2037744 13000 1.6 +0.30 1.9*
ATLAS_2022_I2077575 13000 2.2* +0.40 2.6*
CMS_2018_I1703993 13000 27 -1.0 26
CMS_2021_I1901295 13000 12 0 12
top.pt.ttbarRF
CMS_2018_I1703993 13000 26 -1.0 25
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 3.7 +0.30 4.0
Top rapidity
ATLAS_2019_I1750330 13000 3.9 +0.20 4.1
ATLAS_2020_I1801434 13000 2.9 +1.3 4.2
ATLAS_2022_I2037744 13000 0.51 +0.69 1.2
ATLAS_2022_I2077575 13000 2.3* +0.90 3.2*
CMS_2018_I1703993 13000 23 0 23
CMS_2021_I1901295 13000 11 +1.0 12
topej.dphi
ATLAS_2022_I2037744 13000 2.2 0 2.2
topej.m
ATLAS_2022_I2037744 13000 1.2 -0.35 0.85
χ(ttbar)
ATLAS_2019_I1750330 13000 4.0 +0.60 4.6
ATLAS_2020_I1801434 13000 2.8 +0.50 3.3
ATLAS_2022_I2077575 13000 3.0 +1.6 4.6*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 5.0 +0.60 5.6
ATLAS_2020_I1801434 13000 3.9 -0.70 3.2
ATLAS_2022_I2037744 13000 n/a - 1.0
ATLAS_2022_I2077575 13000 3.5 +0.60 4.1
CMS_2018_I1703993 13000 41 -3.0 38
CMS_2021_I1901295 13000 18 +2.0 20
Δy (ttbar)
CMS_2016_I1430892 8000 0.14 - n/a
CMS_2018_I1703993 13000 24 -1.0 23
CMS_2021_I1901295 13000 10 +1.0 11
ttbar HT
ATLAS_2019_I1750330 13000 3.4 +0.10 3.5
ATLAS_2020_I1801434 13000 3.4 -0.50 2.9
ATLAS_2022_I2037744 13000 2.0 - n/a
ATLAS_2022_I2077575 13000 3.3 -0.100 3.2
CMS_2021_I1901295 13000 10 +1.0 11
m(ttbar)
ATLAS_2019_I1750330 13000 3.3* -0.40 2.9*
ATLAS_2020_I1801434 13000 2.3 +1.0 3.3
ATLAS_2022_I2037744 13000 0.88 -0.32 0.56
ATLAS_2022_I2077575 13000 2.3* +0.30 2.6*
CMS_2018_I1703993 13000 31* -7.0 24
CMS_2021_I1901295 13000 15 0 15
Pcrossttbar
ATLAS_2020_I1801434 13000 4.6 -1.4 3.2
ttbar pT
ATLAS_2019_I1750330 13000 4.6* +0.10 4.7*
ATLAS_2020_I1801434 13000 3.2* -0.60 2.6
ATLAS_2022_I2037744 13000 0.50 +0.24 0.74
ATLAS_2022_I2077575 13000 2.4* -0.10 2.3
CMS_2018_I1703993 13000 25 +1.0 26
CMS_2021_I1901295 13000 12 -1.0 11
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 3.0 -0.20 2.8
ttbar.thetaStar
ATLAS_2022_I2077575 13000 3.9 +1.3 5.2*
CMS_2021_I1901295 13000 15 +1.0 16
Ttbar rapidity
ATLAS_2019_I1750330 13000 4.3 -0.100 4.2
ATLAS_2020_I1801434 13000 2.6 0 2.6
ATLAS_2022_I2037744 13000 0.84 - n/a
ATLAS_2022_I2077575 13000 4.7* -1.4 3.3
CMS_2018_I1703993 13000 23 -1.0 22
CMS_2021_I1901295 13000 14 0 14
Mean rapidity
ATLAS_2019_I1750330 13000 5.5 +0.70 6.2
ATLAS_2020_I1801434 13000 2.5 +0.90 3.4
ATLAS_2022_I2077575 13000 4.9* -1.9 3.0
ttbarej.ht
ATLAS_2022_I2037744 13000 1.2 +0.40 1.6
ttbarej.m
CMS_2021_I1901295 13000 11 +1.0 12
pT ratio
W to b
ATLAS_2020_I1801434 13000 2.5 +1.4 3.9
pT ratio
W to top
ATLAS_2020_I1801434 13000 2.7 +0.90 3.6
Cross sections
ATLAS_2022_I2037744 13000 0.13 +0.78 0.91
ATLAS_2022_I2077575 13000 17 +4.0 21
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.