Generator / tune

Details for Pythia 6.427 361 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 0.46 - n/a
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 3.7 - n/a
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 1.0 - n/a
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 1.9 - n/a
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 0.64 - n/a
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 1.2 - n/a
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 0.61 - n/a
B jet
η
CMS_2018_I1703993 13000 58 -1.0 57
B jet
pT
CMS_2018_I1703993 13000 66 -2.0 64
bjbj.m
CMS_2018_I1703993 13000 85 -2.0 83
bjbj.pt
CMS_2018_I1703993 13000 70 +1.0 71
bjt.dphi
ATLAS_2022_I2037744 13000 2.5 0 2.5
ej.pt
ATLAS_2022_I2037744 13000 3.0 +0.10 3.1*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 2.1 +0.70 2.8
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 2.8 +0.60 3.4
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 2.9 +0.10 3.0
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.9 0 1.9
ejej.dphi
ATLAS_2022_I2037744 13000 0.88 +0.42 1.3
ejets.ht
CMS_2021_I1901295 13000 24 -7.0 17
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 3.5 +0.60 4.1
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 2.5 +0.50 3.0
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.46 -0.16 0.30
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.21 -0.060 0.15
Jet mass
Jet mass
CMS_2017_I1518399 8000 4.8 - n/a
CMS_2019_I1764472 13000 1.1 -0.35 0.75
Jet pT
ATLAS_2014_I1304688 7000 18 0 18
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 1.5 +0.10 1.6
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.22 +0.010 0.23
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.7 -0.100 1.6
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.91 +0.080 0.99
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.6 +0.100 1.7
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.7 +0.60 3.3
Lepton η
ATLAS_2019_I1759875 13000 43 -8.0 35
CMS_2018_I1703993 13000 35 -1.0 34
Lepton pT
ATLAS_2019_I1759875 13000 58 -10 48
CMS_2018_I1703993 13000 66 -3.0 63
CMS_2021_I1901295 13000 15 -2.0 13
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 2.6 -0.40 2.2
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.57 -0.12 0.45
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 3.7 -0.50 3.2
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 49 -8.0 41
Dilepton
Δη
CMS_2016_I1430892 8000 0.56 - n/a
CMS_2018_I1703993 13000 50 -2.0 48
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 35* -10 25
CMS_2018_I1703993 13000 59 -1.0 58
Dilepton
HT
ATLAS_2019_I1759875 13000 46 -6.0 40
Dilepton
m
ATLAS_2019_I1759875 13000 46 -7.0 39
CMS_2018_I1703993 13000 58 -4.0 54
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 47 -7.0 40
CMS_2018_I1703993 13000 55 -1.0 54
Dilepton
y
ATLAS_2019_I1759875 13000 34 -5.0 29
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 1.7 +0.30 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 25 -2.0 23
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.2 +2.9 9.1
CMS_2018_I1703993 13000 52 -4.0 48
sumpt
ATLAS_2022_I2152933 13000 3.1 +2.3 5.4
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 8.4 +0.20 8.6*
ATLAS_2020_I1801434 13000 4.4 +2.0 6.4
ATLAS_2022_I2077575 13000 2.4 -0.80 1.6
Top pT
ATLAS_2019_I1750330 13000 7.0* +0.100 7.1*
ATLAS_2020_I1801434 13000 4.0 +1.6 5.6
ATLAS_2022_I2037744 13000 3.0 - n/a
ATLAS_2022_I2077575 13000 2.2* -0.70 1.5*
CMS_2018_I1703993 13000 83 -2.0 81
CMS_2021_I1901295 13000 25 -1.0 24*
top.pt.ttbarRF
CMS_2018_I1703993 13000 81 -2.0 79
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 4.7 +1.0 5.7
Top rapidity
ATLAS_2019_I1750330 13000 8.4 -0.20 8.2
ATLAS_2020_I1801434 13000 5.1 +0.50 5.6
ATLAS_2022_I2037744 13000 2.1 +0.30 2.4
ATLAS_2022_I2077575 13000 2.4* -0.80 1.6*
CMS_2018_I1703993 13000 77 -1.0 76
CMS_2021_I1901295 13000 25 -1.0 24
topej.dphi
ATLAS_2022_I2037744 13000 2.5 +0.70 3.2
topej.m
ATLAS_2022_I2037744 13000 1.9 +0.10 2.0
χ(ttbar)
ATLAS_2019_I1750330 13000 8.8 +0.100 8.9
ATLAS_2020_I1801434 13000 4.3 +2.5 6.8
ATLAS_2022_I2077575 13000 3.3* -1.6 1.7*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 8.6 -1.1 7.5
ATLAS_2020_I1801434 13000 5.1 +3.3 8.4
ATLAS_2022_I2037744 13000 4.6 -2.0 2.6
ATLAS_2022_I2077575 13000 2.1 -0.40 1.7
CMS_2018_I1703993 13000 120 0 120
CMS_2021_I1901295 13000 36 -3.0 33
Δy (ttbar)
CMS_2016_I1430892 8000 0.68 - n/a
CMS_2018_I1703993 13000 85 -2.0 83
CMS_2021_I1901295 13000 27 -1.0 26
ttbar HT
ATLAS_2019_I1750330 13000 7.0 -0.40 6.6
ATLAS_2020_I1801434 13000 3.8 +1.3 5.1
ATLAS_2022_I2037744 13000 2.3 - n/a
ATLAS_2022_I2077575 13000 2.1 0 2.1*
CMS_2021_I1901295 13000 24 0 24
m(ttbar)
ATLAS_2019_I1750330 13000 5.9* 0 5.9*
ATLAS_2020_I1801434 13000 4.0 +2.0 6.0
ATLAS_2022_I2037744 13000 n/a - 3.9
ATLAS_2022_I2077575 13000 1.9* -0.40 1.5*
CMS_2018_I1703993 13000 90 +30 120*
CMS_2021_I1901295 13000 31 +2.0 33
Pcrossttbar
ATLAS_2020_I1801434 13000 5.1 +0.80 5.9
ttbar pT
ATLAS_2019_I1750330 13000 7.8 0 7.8
ATLAS_2020_I1801434 13000 3.8 +2.2 6.0*
ATLAS_2022_I2037744 13000 2.6 +1.9 4.5
ATLAS_2022_I2077575 13000 2.0* -0.50 1.5*
CMS_2018_I1703993 13000 74 0 74
CMS_2021_I1901295 13000 23* -2.0 21
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 4.5 -0.30 4.2
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.5 -0.60 1.9
CMS_2021_I1901295 13000 34 +1.0 35
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.9 -0.40 7.5
ATLAS_2020_I1801434 13000 3.1 +1.5 4.6
ATLAS_2022_I2037744 13000 1.5 +0.80 2.3
ATLAS_2022_I2077575 13000 2.1 +0.20 2.3
CMS_2018_I1703993 13000 74 -4.0 70
CMS_2021_I1901295 13000 30 0 30
Mean rapidity
ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 3.1 +1.4 4.5
ATLAS_2022_I2077575 13000 2.1 +0.10 2.2
ttbarej.ht
ATLAS_2022_I2037744 13000 2.4 +0.70 3.1
ttbarej.m
CMS_2021_I1901295 13000 26 -3.0 23
pT ratio
W to b
ATLAS_2020_I1801434 13000 4.0 +1.4 5.4
pT ratio
W to top
ATLAS_2020_I1801434 13000 4.2 +1.3 5.5
Cross sections
ATLAS_2022_I2037744 13000 10.0 +4.0 14
ATLAS_2022_I2077575 13000 8.7 -4.1 4.6
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.