Generator / tune

Details for Pythia 6.427 379 vs. 6.428

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (6.427) Δ χ2+5% (6.428)
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 - n/a
B jet
η
CMS_2018_I1703993 13000 3.3 +0.20 3.5
B jet
pT
CMS_2018_I1703993 13000 2.9 +0.10 3.0
bjbj.m
CMS_2018_I1703993 13000 2.6 +1.3 3.9
bjbj.pt
CMS_2018_I1703993 13000 2.2 +0.60 2.8
bjt.dphi
ATLAS_2022_I2037744 13000 1.6 -0.50 1.1
ej.pt
ATLAS_2022_I2037744 13000 2.7 -0.20 2.5*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 1.1 -0.54 0.56
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 0.93 +0.97 1.9
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 1.2 +0.40 1.6
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.0 -0.040 0.96
ejej.dphi
ATLAS_2022_I2037744 13000 1.2 -0.80 0.40
ejets.ht
CMS_2021_I1901295 13000 1.6 +1.8 3.4
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 2.1 -0.90 1.2
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 1.1 -0.13 0.97
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.32 -0.040 0.28
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.064 +0.0040 0.068
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.75 -0.44 0.31
Jet pT
ATLAS_2014_I1304688 7000 3.4 +0.90 4.3
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 1.9 +0.50 2.4
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.35 +0.030 0.38
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.5 -0.10 1.4
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.90 -0.060 0.84
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.4 +0.20 1.6
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.7 -0.40 2.3
Lepton η
ATLAS_2019_I1759875 13000 3.8 +1.2 5.0
CMS_2018_I1703993 13000 2.4 +0.10 2.5
Lepton pT
ATLAS_2019_I1759875 13000 3.7 +1.3 5.0
CMS_2018_I1703993 13000 2.3 +0.30 2.6
CMS_2021_I1901295 13000 1.00 -0.53 0.47
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.5 +0.80 5.3
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.94 +0.040 0.98
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 5.7 +0.90 6.6
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 2.7 +2.8 5.5
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 1.8 +1.00 2.8
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 4.3 -0.50 3.8
CMS_2018_I1703993 13000 7.3 -3.6 3.7
Dilepton
HT
ATLAS_2019_I1759875 13000 3.7 +0.90 4.6
Dilepton
m
ATLAS_2019_I1759875 13000 4.3 -0.30 4.0
CMS_2018_I1703993 13000 2.9 +0.60 3.5
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 5.3 +0.80 6.1
CMS_2018_I1703993 13000 4.1 -1.5 2.6
Dilepton
y
ATLAS_2019_I1759875 13000 3.2 +0.90 4.1
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 0.85 -0.34 0.51
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 1.5 +1.1 2.6
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 1.6 +3.5 5.1
CMS_2018_I1703993 13000 4.3 +1.2 5.5
sumpt
ATLAS_2022_I2152933 13000 2.8 -1.4 1.4
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 1.2 +0.20 1.4
ATLAS_2020_I1801434 13000 1.8 +2.2 4.0
ATLAS_2022_I2077575 13000 4.1* -1.7 2.4
Top pT
ATLAS_2019_I1750330 13000 1.1* +0.30 1.4*
ATLAS_2020_I1801434 13000 2.8 +0.70 3.5
ATLAS_2022_I2037744 13000 1.6 -1.0 0.60
ATLAS_2022_I2077575 13000 2.2* -0.60 1.6*
CMS_2018_I1703993 13000 6.4 +0.90 7.3
CMS_2021_I1901295 13000 2.7* +1.4 4.1*
top.pt.ttbarRF
CMS_2018_I1703993 13000 6.8 +0.30 7.1
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 1.4 +1.5 2.9
Top rapidity
ATLAS_2019_I1750330 13000 1.6 +0.20 1.8
ATLAS_2020_I1801434 13000 3.0 -1.4 1.6
ATLAS_2022_I2037744 13000 1.2 -0.23 0.97
ATLAS_2022_I2077575 13000 2.7* -0.80 1.9*
CMS_2018_I1703993 13000 6.2 +0.50 6.7
CMS_2021_I1901295 13000 1.4 +0.20 1.6
topej.dphi
ATLAS_2022_I2037744 13000 2.8 -1.00 1.8
topej.m
ATLAS_2022_I2037744 13000 1.2 +0.10 1.3
χ(ttbar)
ATLAS_2019_I1750330 13000 1.6 +0.50 2.1
ATLAS_2020_I1801434 13000 2.6 -0.60 2.0
ATLAS_2022_I2077575 13000 2.2 +0.100 2.3*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 1.5 -0.40 1.1
ATLAS_2020_I1801434 13000 1.6 +3.6 5.2
ATLAS_2022_I2037744 13000 3.1 -2.2 0.89
ATLAS_2022_I2077575 13000 3.1 +0.20 3.3*
CMS_2018_I1703993 13000 7.8 +1.4 9.2
CMS_2021_I1901295 13000 3.6 -0.80 2.8
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 7.2 -0.30 6.9
CMS_2021_I1901295 13000 1.3 +1.5 2.8
ttbar HT
ATLAS_2019_I1750330 13000 0.87 +0.11 0.98
ATLAS_2020_I1801434 13000 2.1 +0.60 2.7
ATLAS_2022_I2037744 13000 1.4 -0.84 0.56
ATLAS_2022_I2077575 13000 4.7* -1.6 3.1*
CMS_2021_I1901295 13000 1.1 - n/a
m(ttbar)
ATLAS_2019_I1750330 13000 1.3 +0.40 1.7*
ATLAS_2020_I1801434 13000 3.2 -0.40 2.8
ATLAS_2022_I2037744 13000 2.5 -1.7 0.76
ATLAS_2022_I2077575 13000 2.1* -0.10 2.0*
CMS_2018_I1703993 13000 13 +2.0 15
CMS_2021_I1901295 13000 3.6 +1.8 5.4*
Pcrossttbar
ATLAS_2020_I1801434 13000 1.9 +1.0 2.9
ttbar pT
ATLAS_2019_I1750330 13000 1.5 +0.70 2.2
ATLAS_2020_I1801434 13000 1.7* +2.0 3.7
ATLAS_2022_I2037744 13000 2.3 +0.30 2.6
ATLAS_2022_I2077575 13000 2.4* -0.60 1.8*
CMS_2018_I1703993 13000 7.1 +5.9 13
CMS_2021_I1901295 13000 3.2 +2.4 5.6
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 2.4 -1.0 1.4
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.5 +0.20 2.7*
CMS_2021_I1901295 13000 2.9 +1.3 4.2
Ttbar rapidity
ATLAS_2019_I1750330 13000 1.4 +0.20 1.6*
ATLAS_2020_I1801434 13000 2.4 -0.20 2.2
ATLAS_2022_I2037744 13000 1.2 - n/a
ATLAS_2022_I2077575 13000 3.1 -0.60 2.5*
CMS_2018_I1703993 13000 5.2 +1.0 6.2
CMS_2021_I1901295 13000 2.3 +1.4 3.7
Mean rapidity
ATLAS_2019_I1750330 13000 2.1 -0.40 1.7
ATLAS_2020_I1801434 13000 2.1 -0.40 1.7
ATLAS_2022_I2077575 13000 2.8 -0.30 2.5*
ttbarej.ht
ATLAS_2022_I2037744 13000 1.9 -1.6 0.26
ttbarej.m
CMS_2021_I1901295 13000 1.4 +1.6 3.0
pT ratio
W to b
ATLAS_2020_I1801434 13000 1.5 -0.10 1.4
pT ratio
W to top
ATLAS_2020_I1801434 13000 1.4 +0.40 1.8
Cross sections
ATLAS_2022_I2037744 13000 9.1 -9.1 0.0079
ATLAS_2022_I2077575 13000 18 -5.0 13
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.