Generator

Details for Pythia 8.244 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 0.16 +1.8 2.0
B jet
η
CMS_2018_I1703993 13000 19 -2.0 17
B jet
pT
CMS_2018_I1703993 13000 22 -2.0 20
bjbj.m
CMS_2018_I1703993 13000 26 -4.0 22
bjbj.pt
CMS_2018_I1703993 13000 22 -1.0 21
bjt.dphi
ATLAS_2022_I2037744 13000 2.0 -0.90 1.1
ej.pt
ATLAS_2022_I2037744 13000 2.5* -0.20 2.3*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 3.5 -1.7 1.8
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 1.7 +0.30 2.0
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 1.9 +0.20 2.1
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.3 +0.70 2.0
ejej.dphi
ATLAS_2022_I2037744 13000 2.2 -1.6 0.62
ejets.ht
CMS_2021_I1901295 13000 12 -1.0 11
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 2.4 +1.0 3.4
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 1.5 +0.60 2.1
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.28 -0.14 0.14
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.10 -0.025 0.075
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.39 +0.16 0.55
Jet pT
ATLAS_2014_I1304688 7000 7.1 -0.100 7.0
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 1.7 +0.30 2.0
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.22 +0.070 0.29
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 2.1 -0.30 1.8
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.3 -0.10 1.2
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.9 0 1.9
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 3.1 -0.50 2.6
Lepton η
ATLAS_2019_I1759875 13000 16 -2.0 14
CMS_2018_I1703993 13000 12 -1.0 11
Lepton pT
ATLAS_2019_I1759875 13000 21 -1.0 20
CMS_2018_I1703993 13000 21 -2.0 19
CMS_2021_I1901295 13000 7.2 -1.1 6.1
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 5.0 -0.60 4.4
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.83 -0.030 0.80
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 6.5 -0.90 5.6
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 18 -2.0 16
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 16 -3.0 13
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 13 0 13
CMS_2018_I1703993 13000 24 -3.0 21
Dilepton
HT
ATLAS_2019_I1759875 13000 17 -1.0 16
Dilepton
m
ATLAS_2019_I1759875 13000 17 -2.0 15
CMS_2018_I1703993 13000 22 -5.0 17
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 18 0 18
CMS_2018_I1703993 13000 20 -2.0 18
Dilepton
y
ATLAS_2019_I1759875 13000 13 0 13*
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 1.1 +0.90 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 13 -1.0 12
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 2.6 +1.4 4.0
CMS_2018_I1703993 13000 16 -2.0 14
sumpt
ATLAS_2022_I2152933 13000 2.3 +0.10 2.4
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 4.4 -0.10 4.3
ATLAS_2020_I1801434 13000 2.4 +0.30 2.7
ATLAS_2022_I2077575 13000 3.9* -1.5 2.4
Top pT
ATLAS_2019_I1750330 13000 3.8* -0.40 3.4*
ATLAS_2020_I1801434 13000 2.5 +0.40 2.9
ATLAS_2022_I2037744 13000 0.59* -0.29 0.30
ATLAS_2022_I2077575 13000 2.0* 0 2.0*
CMS_2018_I1703993 13000 27 0 27
CMS_2021_I1901295 13000 13* -1.0 12*
top.pt.ttbarRF
CMS_2018_I1703993 13000 26 0 26
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 3.3 -0.80 2.5
Top rapidity
ATLAS_2019_I1750330 13000 4.2 -0.10 4.1
ATLAS_2020_I1801434 13000 2.7 +0.20 2.9
ATLAS_2022_I2037744 13000 1.2 -0.34 0.86*
ATLAS_2022_I2077575 13000 2.4* -0.10 2.3*
CMS_2018_I1703993 13000 23 0 23
CMS_2021_I1901295 13000 12 -1.0 11
topej.dphi
ATLAS_2022_I2037744 13000 2.0 +0.80 2.8
topej.m
ATLAS_2022_I2037744 13000 0.66 +1.0 1.7
χ(ttbar)
ATLAS_2019_I1750330 13000 4.9 -0.70 4.2
ATLAS_2020_I1801434 13000 2.3 +0.80 3.1
ATLAS_2022_I2077575 13000 4.5* -2.5 2.0
Δφ(ttbar)
ATLAS_2019_I1750330 13000 5.3 -0.80 4.5
ATLAS_2020_I1801434 13000 2.2 +1.6 3.8
ATLAS_2022_I2037744 13000 0.50 +0.31 0.81
ATLAS_2022_I2077575 13000 2.5 +0.30 2.8
CMS_2018_I1703993 13000 37 -2.0 35
CMS_2021_I1901295 13000 21 -2.0 19
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 23 0 23
CMS_2021_I1901295 13000 11 0 11
ttbar HT
ATLAS_2019_I1750330 13000 3.6 -0.20 3.4
ATLAS_2020_I1801434 13000 2.2 +0.60 2.8
ATLAS_2022_I2037744 13000 n/a - 0.66
ATLAS_2022_I2077575 13000 4.0* -0.20 3.8*
CMS_2021_I1901295 13000 12 -1.0 11
m(ttbar)
ATLAS_2019_I1750330 13000 3.6* -1.1 2.5*
ATLAS_2020_I1801434 13000 2.2 +1.1 3.3
ATLAS_2022_I2037744 13000 3.3 - n/a
ATLAS_2022_I2077575 13000 2.0* -0.20 1.8*
CMS_2018_I1703993 13000 23 -2.0 21
CMS_2021_I1901295 13000 16 -1.0 15
Pcrossttbar
ATLAS_2020_I1801434 13000 1.9 +0.90 2.8
ttbar pT
ATLAS_2019_I1750330 13000 4.4 -0.40 4.0
ATLAS_2020_I1801434 13000 1.9 +0.70 2.6
ATLAS_2022_I2037744 13000 0.75 -0.16 0.59
ATLAS_2022_I2077575 13000 2.5* -0.20 2.3*
CMS_2018_I1703993 13000 26 -3.0 23
CMS_2021_I1901295 13000 13 -1.0 12
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 1.8 +0.20 2.0
ttbar.thetaStar
ATLAS_2022_I2077575 13000 3.1 -0.80 2.3
CMS_2021_I1901295 13000 17 -1.0 16
Ttbar rapidity
ATLAS_2019_I1750330 13000 4.1 -0.50 3.6
ATLAS_2020_I1801434 13000 2.0 -0.30 1.7*
ATLAS_2022_I2037744 13000 0.75 -0.24 0.51
ATLAS_2022_I2077575 13000 2.9 +1.6 4.5*
CMS_2018_I1703993 13000 23 0 23
CMS_2021_I1901295 13000 15 -1.0 14
Mean rapidity
ATLAS_2019_I1750330 13000 6.2 -0.60 5.6
ATLAS_2020_I1801434 13000 1.9 +0.80 2.7
ATLAS_2022_I2077575 13000 3.4 +0.80 4.2*
ttbarej.ht
ATLAS_2022_I2037744 13000 1.7 +0.40 2.1
ttbarej.m
CMS_2021_I1901295 13000 13 -2.0 11
pT ratio
W to b
ATLAS_2020_I1801434 13000 2.6 -0.20 2.4
pT ratio
W to top
ATLAS_2020_I1801434 13000 2.3 +0.20 2.5
Cross sections
ATLAS_2022_I2037744 13000 0.028 +0.36 0.39
ATLAS_2022_I2077575 13000 15 +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.