Generator / tune

Details for Pythia 6.426 a vs. 6.427

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (6.426) Δ χ2+5% (6.427)
Asymmetry
AC vs Mttbar
CMS_2016_I1430892 8000 n/a - 1.6
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 n/a - 7.4
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 n/a - 0.99
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 n/a - 0.53
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 n/a - 0.93
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 n/a - 1.3
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 1.1 - n/a
B jet
η
CMS_2018_I1703993 13000 150 +20 170
B jet
pT
CMS_2018_I1703993 13000 190 +10 200
bjbj.m
CMS_2018_I1703993 13000 240 +10 250
bjbj.pt
CMS_2018_I1703993 13000 200 +20 220
bjt.dphi
ATLAS_2022_I2037744 13000 1.4 -0.100 1.3
ej.pt
ATLAS_2022_I2037744 13000 3.2 0 3.2
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 7.0 +0.70 7.7
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 7.6 +0.40 8.0
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 7.2 -0.20 7.0
ΔR(extra jets)
ATLAS_2020_I1801434 13000 6.4 -0.30 6.1*
ejej.dphi
ATLAS_2022_I2037744 13000 1.0 -0.42 0.58
ejets.ht
CMS_2021_I1901295 13000 29 0 29
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 9.6 -2.2 7.4
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 6.3 +0.30 6.6
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.22 -0.080 0.14
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.11 -0.038 0.072
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - 61
CMS_2019_I1764472 13000 2.5 +0.40 2.9
Jet pT
ATLAS_2014_I1304688 7000 29 -1.0 28
ATLAS_2019_I1718132 13000 35* - n/a
Dijet
Δη
ATLAS_2019_I1718132 13000 31 - n/a
Dijet
Δφ
ATLAS_2019_I1718132 13000 39 - n/a
Dijet
HT
ATLAS_2019_I1718132 13000 28 - n/a
Jet mass
Dijet mass
ATLAS_2019_I1718132 13000 45 - n/a
Jet Shapes
Differential Jet Shape
ATLAS_2013_I1243871 7000 1.3 -0.10 1.2
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.27 -0.050 0.22
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.6 -0.20 1.4
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.89 -0.070 0.82
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.4 0 1.4
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 1.5 0 1.5
Lepton η
ATLAS_2019_I1759875 13000 41 -1.0 40
CMS_2018_I1703993 13000 90 +6.0 96
Lepton pT
ATLAS_2019_I1759875 13000 57 -3.0 54
CMS_2018_I1703993 13000 190 +20 210
CMS_2021_I1901295 13000 18 +3.0 21
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.8 +0.20 5.0
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.45 -0.020 0.43
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 5.8 +0.40 6.2
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 41 - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 48 -4.0 44
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - 0.61
CMS_2018_I1703993 13000 130 +10 140
Dilepton
Δφ
ATLAS_2019_I1718132 13000 29 - n/a
ATLAS_2019_I1759875 13000 29 +3.0 32*
CMS_2018_I1703993 13000 150 +10 160
Dilepton
HT
ATLAS_2019_I1759875 13000 46 0 46
Dilepton
m
ATLAS_2019_I1759875 13000 43 +3.0 46
CMS_2018_I1703993 13000 150 +20 170
Dilepton
pT
ATLAS_2019_I1718132 13000 33 - n/a
ATLAS_2019_I1759875 13000 47 -2.0 45
CMS_2018_I1703993 13000 150 +10 160
Dilepton
y
ATLAS_2019_I1759875 13000 33 +1.0 34
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 20 -9.0 11
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 40 +2.0 42
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 9.4 +0.20 9.6
CMS_2018_I1703993 13000 170 +10 180
sumpt
ATLAS_2022_I2152933 13000 27 -11 16
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 8.8 +0.60 9.4
ATLAS_2020_I1801434 13000 7.0 -0.50 6.5
ATLAS_2022_I2077575 13000 1.9* +0.50 2.4*
Top pT
ATLAS_2019_I1750330 13000 6.8 +0.50 7.3
ATLAS_2020_I1801434 13000 6.7 -1.0 5.7
ATLAS_2022_I2037744 13000 1.2 +0.80 2.0
ATLAS_2022_I2077575 13000 1.3* +0.20 1.5*
CMS_2018_I1703993 13000 180 +10 190
CMS_2021_I1901295 13000 34 +2.0 36*
top.pt.ttbarRF
CMS_2018_I1703993 13000 180 +10 190
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 9.0 -0.50 8.5
Top rapidity
ATLAS_2019_I1750330 13000 8.5 +0.60 9.1
ATLAS_2020_I1801434 13000 7.9 +0.100 8.0
ATLAS_2022_I2037744 13000 1.3 +0.80 2.1
ATLAS_2022_I2077575 13000 1.8* -0.30 1.5*
CMS_2018_I1703993 13000 160 +10 170
CMS_2021_I1901295 13000 32 +2.0 34
topej.dphi
ATLAS_2022_I2037744 13000 2.4 +0.60 3.0
topej.m
ATLAS_2022_I2037744 13000 1.2 +0.50 1.7
χ(ttbar)
ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 8.7 -0.30 8.4
ATLAS_2022_I2077575 13000 1.5 +0.30 1.8
Δφ(ttbar)
ATLAS_2019_I1750330 13000 8.7 +0.40 9.1
ATLAS_2020_I1801434 13000 8.4 -1.3 7.1
ATLAS_2022_I2037744 13000 1.2 +1.6 2.8
ATLAS_2022_I2077575 13000 2.4 -1.0 1.4
CMS_2018_I1703993 13000 320 -10 310
CMS_2021_I1901295 13000 49 +1.0 50
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - 0.15
CMS_2018_I1703993 13000 170 +10 180
CMS_2021_I1901295 13000 34 +3.0 37
ttbar HT
ATLAS_2019_I1750330 13000 7.0 +0.50 7.5
ATLAS_2020_I1801434 13000 7.7 -0.70 7.0
ATLAS_2022_I2037744 13000 1.8 +2.3 4.1
ATLAS_2022_I2077575 13000 1.8* 0 1.8*
CMS_2021_I1901295 13000 30 +2.0 32
m(ttbar)
ATLAS_2019_I1750330 13000 5.9 -0.30 5.6
ATLAS_2020_I1801434 13000 7.6 -0.70 6.9
ATLAS_2022_I2037744 13000 2.4 -1.3 1.1
ATLAS_2022_I2077575 13000 1.2* +0.20 1.4*
CMS_2018_I1703993 13000 170 +10 180
CMS_2021_I1901295 13000 45 +3.0 48
Pcrossttbar
ATLAS_2020_I1801434 13000 7.3 +0.20 7.5
ttbar pT
ATLAS_2019_I1750330 13000 8.4 +0.40 8.8
ATLAS_2020_I1801434 13000 6.6 -0.20 6.4
ATLAS_2022_I2037744 13000 1.7 +1.4 3.1
ATLAS_2022_I2077575 13000 1.9* -0.50 1.4*
CMS_2018_I1703993 13000 210 +10 220
CMS_2021_I1901295 13000 29 +1.0 30
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 8.0 -0.80 7.2
ttbar.thetaStar
ATLAS_2022_I2077575 13000 1.8 +0.40 2.2
CMS_2021_I1901295 13000 46 +3.0 49
Ttbar rapidity
ATLAS_2019_I1750330 13000 8.0 +0.40 8.4
ATLAS_2020_I1801434 13000 6.3* -1.8 4.5*
ATLAS_2022_I2037744 13000 0.56 +0.0100 0.57
ATLAS_2022_I2077575 13000 1.7 +0.20 1.9*
CMS_2018_I1703993 13000 140 +10 150
CMS_2021_I1901295 13000 41 +4.0 45
Mean rapidity
ATLAS_2019_I1750330 13000 12 0 12
ATLAS_2020_I1801434 13000 6.2 -0.10 6.1
ATLAS_2022_I2077575 13000 1.9 +0.20 2.1*
ttbarej.ht
ATLAS_2022_I2037744 13000 2.6 +1.7 4.3
ttbarej.m
CMS_2021_I1901295 13000 35 +2.0 37
pT ratio
W to b
ATLAS_2020_I1801434 13000 7.9 +0.30 8.2
pT ratio
W to top
ATLAS_2020_I1801434 13000 7.4 0 7.4
Cross sections
ATLAS_2022_I2037744 13000 2.1 -0.30 1.8
ATLAS_2022_I2077575 13000 6.7 -1.2 5.5
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.