Generator / tune

Details for Pythia 6.426 z2 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 4.5 - n/a
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 9.9 - n/a
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 5.0 - n/a
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 0.43 - n/a
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 0.094 - n/a
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 0.40 - n/a
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 - 1.0
B jet
 η
 CMS_2018_I1703993 13000 - 44
B jet
 pT
 CMS_2018_I1703993 13000 - 53
bjbj.m
 CMS_2018_I1703993 13000 - 62
bjbj.pt
 CMS_2018_I1703993 13000 - 56
bjt.dphi
 ATLAS_2022_I2037744 13000 - 1.6
ej.pt
 ATLAS_2022_I2037744 13000 - 2.8
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 - 3.7
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 - 4.3
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 - 4.3
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 - 3.3
ejej.dphi
 ATLAS_2022_I2037744 13000 - 0.79
ejets.ht
 CMS_2021_I1901295 13000 - 11
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 - 4.6
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 - 4.0*
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.61 +0.39 1.0
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.34 +0.49 0.83
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 6.6 - n/a
CMS_2019_I1764472 13000 - 0.55
Jet pT
 ATLAS_2014_I1304688 7000 17 -1.0 16
ATLAS_2019_I1718132 13000 9.2* - n/a
Dijet
 Δη
 ATLAS_2019_I1718132 13000 6.5 - n/a
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 9.9 - n/a
Dijet
 HT
 ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 9.9 - n/a
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 4.1 +0.20 4.3
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.83 +0.13 0.96
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.0 +0.40 2.4
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.5 +0.40 1.9
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.1 +0.30 2.4
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.0 +0.40 3.4
Lepton η
 ATLAS_2019_I1759875 13000 - 32
CMS_2018_I1703993 13000 - 27
Lepton pT
 ATLAS_2019_I1759875 13000 - 42
CMS_2018_I1703993 13000 - 50
CMS_2021_I1901295 13000 - 13
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 5.6 -0.100 5.5
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.1 0 1.1
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.2 0 7.2
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 8.1 - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 - 36
Dilepton
 Δη
 CMS_2016_I1430892 8000 1.2 - n/a
CMS_2018_I1703993 13000 - 37
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 5.3 - n/a
ATLAS_2019_I1759875 13000 - 21
CMS_2018_I1703993 13000 - 42
Dilepton
 HT
 ATLAS_2019_I1759875 13000 - 35
Dilepton
 m
 ATLAS_2019_I1759875 13000 - 34
CMS_2018_I1703993 13000 - 45
Dilepton
 pT
 ATLAS_2019_I1718132 13000 6.8 - n/a
ATLAS_2019_I1759875 13000 - 34
CMS_2018_I1703993 13000 - 42
Dilepton
 y
 ATLAS_2019_I1759875 13000 - 25
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 - 1.5
Jet Multiplicities
 Extra jets multiplicity
 ATLAS_2019_I1750330 13000 - n/a
ATLAS_2022_I2037744 13000 - n/a
CMS_2021_I1901295 13000 - 19
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 - 8.0
CMS_2018_I1703993 13000 - 43
sumpt
 ATLAS_2022_I2152933 13000 - 6.4
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 - n/a
Pouttop
 ATLAS_2019_I1750330 13000 - 7.6
ATLAS_2020_I1801434 13000 - 5.1*
ATLAS_2022_I2077575 13000 - 1.6
Top pT
 ATLAS_2019_I1750330 13000 - 5.5*
ATLAS_2020_I1801434 13000 - 5.2
ATLAS_2022_I2037744 13000 - 1.3
ATLAS_2022_I2077575 13000 - 1.2*
CMS_2018_I1703993 13000 - 72
CMS_2021_I1901295 13000 - 20*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 - 66
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 - 6.0
Top rapidity
 ATLAS_2019_I1750330 13000 - 6.8
ATLAS_2020_I1801434 13000 - 6.8
ATLAS_2022_I2037744 13000 - 1.0*
ATLAS_2022_I2077575 13000 - 1.5*
CMS_2018_I1703993 13000 - 64
CMS_2021_I1901295 13000 - 21
topej.dphi
 ATLAS_2022_I2037744 13000 - 2.8
topej.m
 ATLAS_2022_I2037744 13000 - 0.73
χ(ttbar)
 ATLAS_2019_I1750330 13000 - 7.6
ATLAS_2020_I1801434 13000 - 6.9
ATLAS_2022_I2077575 13000 - 1.8
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 - 6.2
ATLAS_2020_I1801434 13000 - 7.0
ATLAS_2022_I2037744 13000 - 2.0
ATLAS_2022_I2077575 13000 - 1.8
CMS_2018_I1703993 13000 - 92
CMS_2021_I1901295 13000 - 26
Δy (ttbar)
 CMS_2016_I1430892 8000 1.2 - n/a
CMS_2018_I1703993 13000 - 73
CMS_2021_I1901295 13000 - 22
ttbar HT
 ATLAS_2019_I1750330 13000 - 5.8
ATLAS_2020_I1801434 13000 - 4.7
ATLAS_2022_I2037744 13000 - 0.74
ATLAS_2022_I2077575 13000 - 1.5
CMS_2021_I1901295 13000 - n/a
m(ttbar)
 ATLAS_2019_I1750330 13000 - 4.9
ATLAS_2020_I1801434 13000 - 6.1
ATLAS_2022_I2037744 13000 - 1.2
ATLAS_2022_I2077575 13000 - 1.4*
CMS_2018_I1703993 13000 - 72
CMS_2021_I1901295 13000 - 28*
Pcrossttbar
 ATLAS_2020_I1801434 13000 - 6.5
ttbar pT
 ATLAS_2019_I1750330 13000 - 6.9
ATLAS_2020_I1801434 13000 - 4.7*
ATLAS_2022_I2037744 13000 - 2.0
ATLAS_2022_I2077575 13000 - 1.4*
CMS_2018_I1703993 13000 - 65
CMS_2021_I1901295 13000 - 15
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 - 5.3
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 - 1.3
CMS_2021_I1901295 13000 - 29
Ttbar rapidity
 ATLAS_2019_I1750330 13000 - 6.4
ATLAS_2020_I1801434 13000 - 3.6*
ATLAS_2022_I2037744 13000 - 0.48
ATLAS_2022_I2077575 13000 - 2.2
CMS_2018_I1703993 13000 - 58
CMS_2021_I1901295 13000 - 25
Mean rapidity
 ATLAS_2019_I1750330 13000 - 9.7
ATLAS_2020_I1801434 13000 - 4.9
ATLAS_2022_I2077575 13000 - 2.0
ttbarej.ht
 ATLAS_2022_I2037744 13000 - 2.5
ttbarej.m
 CMS_2021_I1901295 13000 - 18
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 - 5.3
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 - 5.5
Cross sections
 ATLAS_2022_I2037744 13000 - 1.1
ATLAS_2022_I2077575 13000 - 5.3
CMS_2019_I1753720 13000 - 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 1199 histograms.