Generator

Details for Pythia 8.235 default-CD vs. default-DL

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (default-CD) Δ χ2+5% (default-DL)
Asymmetry
AC vs Mttbar
CMS_2016_I1430892 8000 n/a - 0.74
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 n/a - 8.2
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 n/a - 1.3
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 n/a - 2.1
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 n/a - 0.41
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 n/a - 0.58
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 0.76 +0.54 1.3
B jet
η
CMS_2018_I1703993 13000 21 +2.0 23
B jet
pT
CMS_2018_I1703993 13000 26 0 26
bjbj.m
CMS_2018_I1703993 13000 32 +2.0 34
bjbj.pt
CMS_2018_I1703993 13000 26 +1.0 27
bjt.dphi
ATLAS_2022_I2037744 13000 2.3 -1.00 1.3
ej.pt
ATLAS_2022_I2037744 13000 2.4 -0.10 2.3
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 1.5 +0.20 1.7
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 1.5 +0.60 2.1
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 1.7 +0.20 1.9
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.3 +0.100 1.4
ejej.dphi
ATLAS_2022_I2037744 13000 1.2 -0.65 0.55
ejets.ht
CMS_2021_I1901295 13000 13 -2.0 11
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 2.0 -0.30 1.7
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 1.7 +0.50 2.2
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.35 -0.13 0.22
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.11 -0.036 0.074
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - 4.8
CMS_2019_I1764472 13000 0.70 -0.26 0.44
Jet pT
ATLAS_2014_I1304688 7000 6.2 +0.90 7.1
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 +0.20 2.3
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.31 +0.020 0.33
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 2.1 -0.20 1.9
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.3 +0.100 1.4
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.8 +0.100 1.9
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 3.0 -0.10 2.9
Lepton η
ATLAS_2019_I1759875 13000 15 +1.0 16
CMS_2018_I1703993 13000 13 +1.0 14
Lepton pT
ATLAS_2019_I1759875 13000 21 +1.0 22
CMS_2018_I1703993 13000 25 +1.0 26
CMS_2021_I1901295 13000 5.9 +1.5 7.4
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 5.1 -0.30 4.8
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.85 -0.20 0.65
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 6.4 -0.70 5.7
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 20 0 20
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - 0.65
CMS_2018_I1703993 13000 18 +1.0 19
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 15* -1.0 14*
CMS_2018_I1703993 13000 26 +2.0 28
Dilepton
HT
ATLAS_2019_I1759875 13000 17 +1.0 18
Dilepton
m
ATLAS_2019_I1759875 13000 17 0 17
CMS_2018_I1703993 13000 26 +1.0 27
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 18 +1.0 19
CMS_2018_I1703993 13000 22 0 22
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 1.8 -0.50 1.3
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 12 +4.0 16
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 2.7 +0.100 2.8
CMS_2018_I1703993 13000 19 +2.0 21
sumpt
ATLAS_2022_I2152933 13000 3.8 -0.70 3.1
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 3.9 +0.50 4.4
ATLAS_2020_I1801434 13000 2.6 +0.20 2.8
ATLAS_2022_I2077575 13000 4.2* -1.9 2.3
Top pT
ATLAS_2019_I1750330 13000 3.5* -0.20 3.3*
ATLAS_2020_I1801434 13000 2.0 -0.30 1.7
ATLAS_2022_I2037744 13000 2.4* -1.4 0.97
ATLAS_2022_I2077575 13000 2.2* +0.100 2.3*
CMS_2018_I1703993 13000 32 -1.0 31
CMS_2021_I1901295 13000 12* 0 12*
top.pt.ttbarRF
CMS_2018_I1703993 13000 30 0 30
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 2.3 +0.40 2.7
Top rapidity
ATLAS_2019_I1750330 13000 3.7 +0.30 4.0
ATLAS_2020_I1801434 13000 3.6 -1.0 2.6
ATLAS_2022_I2037744 13000 0.79* -0.13 0.66*
ATLAS_2022_I2077575 13000 2.3* +0.10 2.4*
CMS_2018_I1703993 13000 27 +1.0 28
CMS_2021_I1901295 13000 11 0 11
topej.dphi
ATLAS_2022_I2037744 13000 2.1 0 2.1
topej.m
ATLAS_2022_I2037744 13000 0.68 +0.13 0.81
χ(ttbar)
ATLAS_2019_I1750330 13000 4.3 +0.40 4.7
ATLAS_2020_I1801434 13000 2.8 -0.30 2.5
ATLAS_2022_I2077575 13000 2.5 +1.3 3.8*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 4.9 -0.50 4.4
ATLAS_2020_I1801434 13000 2.4 0 2.4
ATLAS_2022_I2037744 13000 6.8 -5.2 1.6
ATLAS_2022_I2077575 13000 3.3 -0.40 2.9
CMS_2018_I1703993 13000 41 +1.0 42
CMS_2021_I1901295 13000 19 0 19
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - 0.27
CMS_2018_I1703993 13000 27 +1.0 28
CMS_2021_I1901295 13000 11 +1.0 12
ttbar HT
ATLAS_2019_I1750330 13000 3.2 +0.20 3.4
ATLAS_2020_I1801434 13000 1.7 -0.20 1.5
ATLAS_2022_I2037744 13000 n/a - 0.39
ATLAS_2022_I2077575 13000 3.2 -0.80 2.4
CMS_2021_I1901295 13000 9.9 +1.1 11
m(ttbar)
ATLAS_2019_I1750330 13000 3.2* -0.40 2.8*
ATLAS_2020_I1801434 13000 2.6 -0.70 1.9
ATLAS_2022_I2037744 13000 1.3 -0.10 1.2
ATLAS_2022_I2077575 13000 1.9* +0.10 2.0*
CMS_2018_I1703993 13000 26 0 26
CMS_2021_I1901295 13000 15 +2.0 17
Pcrossttbar
ATLAS_2020_I1801434 13000 2.4 -0.20 2.2
ttbar pT
ATLAS_2019_I1750330 13000 4.6* -0.50 4.1
ATLAS_2020_I1801434 13000 2.3* -0.30 2.0
ATLAS_2022_I2037744 13000 2.5 -1.2 1.3
ATLAS_2022_I2077575 13000 2.1 +0.20 2.3*
CMS_2018_I1703993 13000 27 +4.0 31
CMS_2021_I1901295 13000 10* +1.0 11
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 2.0 +0.70 2.7
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.3 +2.0 4.3*
CMS_2021_I1901295 13000 16 +1.0 17
Ttbar rapidity
ATLAS_2019_I1750330 13000 3.8 0 3.8
ATLAS_2020_I1801434 13000 2.5 -0.50 2.0
ATLAS_2022_I2037744 13000 0.37 +0.32 0.69
ATLAS_2022_I2077575 13000 4.1* -0.40 3.7
CMS_2018_I1703993 13000 26 +2.0 28
CMS_2021_I1901295 13000 15 0 15
Mean rapidity
ATLAS_2019_I1750330 13000 5.7 +0.40 6.1
ATLAS_2020_I1801434 13000 2.3 0 2.3
ATLAS_2022_I2077575 13000 4.2* -0.70 3.5
ttbarej.ht
ATLAS_2022_I2037744 13000 0.95 -0.40 0.55
ttbarej.m
CMS_2021_I1901295 13000 12 +1.0 13
pT ratio
W to b
ATLAS_2020_I1801434 13000 2.0 -0.10 1.9
pT ratio
W to top
ATLAS_2020_I1801434 13000 2.5 -0.40 2.1
Cross sections
ATLAS_2022_I2037744 13000 0.33 +0.43 0.76
ATLAS_2022_I2077575 13000 17 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.