Generator / tune

Details for Pythia 6.427 z1 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 - 0.61
B jet
 η
 CMS_2018_I1703993 13000 58 -9.0 49
B jet
 pT
 CMS_2018_I1703993 13000 72 -11 61
bjbj.m
 CMS_2018_I1703993 13000 89 -10 79
bjbj.pt
 CMS_2018_I1703993 13000 74 -10 64
bjt.dphi
 ATLAS_2022_I2037744 13000 1.2 +1.9 3.1
ej.pt
 ATLAS_2022_I2037744 13000 3.6 -0.20 3.4
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 2.2 +0.80 3.0
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.3 -0.30 3.0
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.1 -0.10 3.0
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.1 -0.50 1.6
ejej.dphi
 ATLAS_2022_I2037744 13000 1.4 -0.100 1.3
ejets.ht
 CMS_2021_I1901295 13000 13 -2.0 11
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.9 -0.70 3.2
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.4 -0.10 2.3
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.77 +0.43 1.2
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.58 +0.090 0.67
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.6 -0.81 0.79
Jet pT
 ATLAS_2014_I1304688 7000 16 +1.0 17
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 5.0 -0.50 4.5
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 1.1 -0.14 0.96
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.4 +0.30 2.7
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 2.1 -0.10 2.0
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.3 +0.20 2.5
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.4 +0.10 3.5
Lepton η
 ATLAS_2019_I1759875 13000 37 +2.0 39
CMS_2018_I1703993 13000 35 -5.0 30
Lepton pT
 ATLAS_2019_I1759875 13000 53 -1.0 52
CMS_2018_I1703993 13000 67 -11 56
CMS_2021_I1901295 13000 15 -1.0 14
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.3 -0.20 6.1
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.2 0 1.2
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 8.9 -1.9 7.0
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 44 0 44
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 50 -6.0 44
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 30* -1.0 29*
CMS_2018_I1703993 13000 56 -3.0 53
Dilepton
 HT
 ATLAS_2019_I1759875 13000 45 -2.0 43
Dilepton
 m
 ATLAS_2019_I1759875 13000 39 +3.0 42
CMS_2018_I1703993 13000 58 -6.0 52
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 44 0 44
CMS_2018_I1703993 13000 55 -3.0 52
Dilepton
 y
 ATLAS_2019_I1759875 13000 31 0 31
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 2.4 -0.20 2.2
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 23 -1.0 22
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 5.3 +1.8 7.1
CMS_2018_I1703993 13000 54 +2.0 56
sumpt
 ATLAS_2022_I2152933 13000 6.3 -0.80 5.5
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 8.6 0 8.6
ATLAS_2020_I1801434 13000 4.2 +0.60 4.8
ATLAS_2022_I2077575 13000 2.2 +0.80 3.0
Top pT
 ATLAS_2019_I1750330 13000 6.0 -0.100 5.9*
ATLAS_2020_I1801434 13000 4.0 +1.5 5.5
ATLAS_2022_I2037744 13000 1.1 -0.10 1.00
ATLAS_2022_I2077575 13000 1.9* -0.50 1.4*
CMS_2018_I1703993 13000 89 -5.0 84
CMS_2021_I1901295 13000 24* -1.0 23*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 85 -7.0 78
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 4.2 +0.70 4.9
Top rapidity
 ATLAS_2019_I1750330 13000 7.8 -0.30 7.5
ATLAS_2020_I1801434 13000 3.8 +1.5 5.3
ATLAS_2022_I2037744 13000 0.91* -0.29 0.62
ATLAS_2022_I2077575 13000 2.6* -0.70 1.9*
CMS_2018_I1703993 13000 77 0 77
CMS_2021_I1901295 13000 26 -2.0 24
topej.dphi
 ATLAS_2022_I2037744 13000 2.9 -0.30 2.6
topej.m
 ATLAS_2022_I2037744 13000 0.99 +0.21 1.2
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.9 -0.30 8.6
ATLAS_2020_I1801434 13000 3.8 +1.2 5.0
ATLAS_2022_I2077575 13000 3.2* -0.50 2.7*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.1 -0.20 6.9
ATLAS_2020_I1801434 13000 4.8 +1.6 6.4
ATLAS_2022_I2037744 13000 4.1 -0.60 3.5
ATLAS_2022_I2077575 13000 2.2 -0.30 1.9
CMS_2018_I1703993 13000 110 0 110
CMS_2021_I1901295 13000 32 -2.0 30
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 82 +4.0 86
CMS_2021_I1901295 13000 26 -1.0 25
ttbar HT
 ATLAS_2019_I1750330 13000 7.1 -0.60 6.5
ATLAS_2020_I1801434 13000 3.6 0 3.6
ATLAS_2022_I2037744 13000 0.49 +0.17 0.66
ATLAS_2022_I2077575 13000 2.9 -0.30 2.6*
CMS_2021_I1901295 13000 26 -2.0 24
m(ttbar)
 ATLAS_2019_I1750330 13000 4.9* -0.30 4.6*
ATLAS_2020_I1801434 13000 4.6 0 4.6
ATLAS_2022_I2037744 13000 1.4 -0.65 0.75
ATLAS_2022_I2077575 13000 1.9* 0 1.9*
CMS_2018_I1703993 13000 88 +4.0 92
CMS_2021_I1901295 13000 31* -1.0 30*
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.1 +1.1 5.2
ttbar pT
 ATLAS_2019_I1750330 13000 7.6 -0.100 7.5
ATLAS_2020_I1801434 13000 4.0 +1.1 5.1
ATLAS_2022_I2037744 13000 4.2 -1.2 3.0
ATLAS_2022_I2077575 13000 1.9* +0.10 2.0
CMS_2018_I1703993 13000 80 0 80
CMS_2021_I1901295 13000 18 0 18
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 3.4 +1.0 4.4
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.9 -0.20 2.7*
CMS_2021_I1901295 13000 34 -2.0 32
Ttbar rapidity
 ATLAS_2019_I1750330 13000 7.3 -0.30 7.0
ATLAS_2020_I1801434 13000 3.7 +0.100 3.8
ATLAS_2022_I2037744 13000 0.87 -0.24 0.63
ATLAS_2022_I2077575 13000 3.8* -1.4 2.4*
CMS_2018_I1703993 13000 70 0 70
CMS_2021_I1901295 13000 30 -1.0 29
Mean rapidity
 ATLAS_2019_I1750330 13000 11 -1.0 10
ATLAS_2020_I1801434 13000 3.2 +0.40 3.6
ATLAS_2022_I2077575 13000 2.6 -0.40 2.2*
ttbarej.ht
 ATLAS_2022_I2037744 13000 4.6 0 4.6
ttbarej.m
 CMS_2021_I1901295 13000 21 -1.0 20
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.3 +0.20 4.5
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 3.8 +0.60 4.4
Cross sections
 ATLAS_2022_I2037744 13000 0.00013 +0.58 0.58
ATLAS_2022_I2077575 13000 10 -2.6 7.4
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.