Generator

Details for Pythia 8.230 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 - 0.52
B jet
 η
 CMS_2018_I1703993 13000 24 -8.0 16
B jet
 pT
 CMS_2018_I1703993 13000 27 -7.0 20
bjbj.m
 CMS_2018_I1703993 13000 33 -7.0 26
bjbj.pt
 CMS_2018_I1703993 13000 29 -9.0 20
bjt.dphi
 ATLAS_2022_I2037744 13000 1.2 -0.43 0.77
ej.pt
 ATLAS_2022_I2037744 13000 2.3 -0.100 2.2
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 4.3 -2.2 2.1
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 2.8 -0.70 2.1
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 2.4 -0.60 1.8
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.5 -0.80 1.7*
ejej.dphi
 ATLAS_2022_I2037744 13000 0.99 +0.31 1.3
ejets.ht
 CMS_2021_I1901295 13000 9.9 +0.100 10.0
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.2 +0.100 3.3
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.8 -0.90 1.9
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.092 +0.15 0.24
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.025 +0.095 0.12
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.46 -0.43 0.028
Jet pT
 ATLAS_2014_I1304688 7000 7.1 -0.50 6.6
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 2.4 -0.10 2.3
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.34 -0.030 0.31
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.9 +0.30 2.2
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.2 +0.20 1.4
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.8 +0.20 2.0
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.7 +0.40 3.1
Lepton η
 ATLAS_2019_I1759875 13000 16 -4.0 12
CMS_2018_I1703993 13000 15 -4.0 11
Lepton pT
 ATLAS_2019_I1759875 13000 21 -4.0 17
CMS_2018_I1703993 13000 27 -8.0 19
CMS_2021_I1901295 13000 6.6 +0.30 6.9
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 4.7 0 4.7
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.64 +0.090 0.73
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 5.6 +0.30 5.9
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 17 -3.0 14
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 20 -5.0 15
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 11 -1.9 9.1
CMS_2018_I1703993 13000 24 -3.0 21
Dilepton
 HT
 ATLAS_2019_I1759875 13000 17 -3.0 14
Dilepton
 m
 ATLAS_2019_I1759875 13000 16 -3.0 13
CMS_2018_I1703993 13000 24 -5.0 19
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 17 -4.0 13
CMS_2018_I1703993 13000 23 -6.0 17
Dilepton
 y
 ATLAS_2019_I1759875 13000 12 -2.0 10
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 1.4 +2.3 3.7
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 0 13
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 4.2 +0.20 4.4
CMS_2018_I1703993 13000 22 -8.0 14
sumpt
 ATLAS_2022_I2152933 13000 2.6 +3.7 6.3
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 2.6 +1.1 3.7
ATLAS_2022_I2077575 13000 2.0 +0.40 2.4
Top pT
 ATLAS_2019_I1750330 13000 3.4* +0.50 3.9*
ATLAS_2020_I1801434 13000 2.7 -0.30 2.4
ATLAS_2022_I2037744 13000 0.54 +1.1 1.6*
ATLAS_2022_I2077575 13000 1.9* +0.10 2.0*
CMS_2018_I1703993 13000 33 -5.0 28
CMS_2021_I1901295 13000 13* -1.0 12*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 32 -7.0 25
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 4.7 -0.90 3.8
Top rapidity
 ATLAS_2019_I1750330 13000 4.2 0 4.2
ATLAS_2020_I1801434 13000 3.9 -0.70 3.2
ATLAS_2022_I2037744 13000 1.2 -0.28 0.92
ATLAS_2022_I2077575 13000 2.5* -0.20 2.3*
CMS_2018_I1703993 13000 29 -6.0 23
CMS_2021_I1901295 13000 12 -1.0 11
topej.dphi
 ATLAS_2022_I2037744 13000 2.1 +0.20 2.3
topej.m
 ATLAS_2022_I2037744 13000 2.6 -0.80 1.8
χ(ttbar)
 ATLAS_2019_I1750330 13000 4.8 -0.40 4.4
ATLAS_2020_I1801434 13000 4.0 -1.0 3.0
ATLAS_2022_I2077575 13000 2.6 +0.90 3.5*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 4.6 +0.60 5.2
ATLAS_2020_I1801434 13000 2.8 +0.90 3.7
ATLAS_2022_I2037744 13000 1.8 +0.80 2.6
ATLAS_2022_I2077575 13000 2.7 +1.4 4.1
CMS_2018_I1703993 13000 45 -7.0 38
CMS_2021_I1901295 13000 18 0 18
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 29 -4.0 25
CMS_2021_I1901295 13000 12 -1.0 11
ttbar HT
 ATLAS_2019_I1750330 13000 3.4 +0.40 3.8*
ATLAS_2020_I1801434 13000 2.7 0 2.7
ATLAS_2022_I2037744 13000 1.3 - n/a
ATLAS_2022_I2077575 13000 2.3 +1.5 3.8*
CMS_2021_I1901295 13000 n/a - 10
m(ttbar)
 ATLAS_2019_I1750330 13000 3.1* 0 3.1*
ATLAS_2020_I1801434 13000 3.8 -1.5 2.3
ATLAS_2022_I2037744 13000 n/a - 0.58
ATLAS_2022_I2077575 13000 1.6* +0.60 2.2*
CMS_2018_I1703993 13000 28 -3.0 25
CMS_2021_I1901295 13000 16 0 16*
Pcrossttbar
 ATLAS_2020_I1801434 13000 3.4 -0.70 2.7
ttbar pT
 ATLAS_2019_I1750330 13000 4.1 0 4.1
ATLAS_2020_I1801434 13000 3.0 +0.40 3.4
ATLAS_2022_I2037744 13000 0.38 +1.3 1.7
ATLAS_2022_I2077575 13000 1.9 +0.50 2.4*
CMS_2018_I1703993 13000 28 -4.0 24
CMS_2021_I1901295 13000 10 +1.0 11
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 3.4 -0.60 2.8
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 3.0 +0.60 3.6*
CMS_2021_I1901295 13000 17 -1.0 16
Ttbar rapidity
 ATLAS_2019_I1750330 13000 4.0 +0.100 4.1
ATLAS_2020_I1801434 13000 2.5* -0.60 1.9*
ATLAS_2022_I2037744 13000 0.59 +0.31 0.90
ATLAS_2022_I2077575 13000 3.6* +0.70 4.3*
CMS_2018_I1703993 13000 29 -5.0 24
CMS_2021_I1901295 13000 16 -1.0 15
Mean rapidity
 ATLAS_2019_I1750330 13000 6.5 -0.50 6.0
ATLAS_2020_I1801434 13000 3.3 -0.70 2.6
ATLAS_2022_I2077575 13000 3.6* +0.70 4.3*
ttbarej.ht
 ATLAS_2022_I2037744 13000 1.1 0 1.1
ttbarej.m
 CMS_2021_I1901295 13000 14 - n/a
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.8 -2.1 2.7
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 3.6 -0.80 2.8
Cross sections
 ATLAS_2022_I2037744 13000 0.074 +1.0 1.1
ATLAS_2022_I2077575 13000 13 +2.0 15
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.