Generator / tune

Details for Pythia 6.426 default 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 - 0.23
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 n/a - 1.2
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 n/a - 1.2
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 n/a - 0.76
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 n/a - 0.25
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 n/a - 0.23
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 n/a -
B jet
 η
 CMS_2018_I1703993 13000 150 -
B jet
 pT
 CMS_2018_I1703993 13000 190 -
bjbj.m
 CMS_2018_I1703993 13000 230 -
bjbj.pt
 CMS_2018_I1703993 13000 200 -
bjt.dphi
 ATLAS_2022_I2037744 13000 2.3 -
ej.pt
 ATLAS_2022_I2037744 13000 3.3 -
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 7.8 -
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 7.1 -
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 7.6 -
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 5.9 -
ejej.dphi
 ATLAS_2022_I2037744 13000 3.1 -
ejets.ht
 CMS_2021_I1901295 13000 31 -
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 7.5 -
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 6.1 -
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.11 +0.060 0.17
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.075 +0.021 0.096
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - 74
CMS_2019_I1764472 13000 n/a -
Jet pT
 ATLAS_2014_I1304688 7000 29 -1.0 28
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 1.0 +0.20 1.2
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.21 +0.030 0.24
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.5 -0.10 1.4
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.77 +0.030 0.80
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.3 -0.20 1.1
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 1.7 -0.20 1.5
Lepton η
 ATLAS_2019_I1759875 13000 41 -
CMS_2018_I1703993 13000 90 -
Lepton pT
 ATLAS_2019_I1759875 13000 55 -
CMS_2018_I1703993 13000 190 -
CMS_2021_I1901295 13000 19 -
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 4.4 -0.30 4.1
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.41 -0.0100 0.40
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 5.1 0 5.1
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 48 -
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - 0.23
CMS_2018_I1703993 13000 130 -
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 33* -
CMS_2018_I1703993 13000 140 -
Dilepton
 HT
 ATLAS_2019_I1759875 13000 46 -
Dilepton
 m
 ATLAS_2019_I1759875 13000 44 -
CMS_2018_I1703993 13000 150 -
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 47 -
CMS_2018_I1703993 13000 150 -
Dilepton
 y
 ATLAS_2019_I1759875 13000 33 -
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 17 -
Jet Multiplicities
 Extra jets multiplicity
 ATLAS_2019_I1750330 13000 n/a -
ATLAS_2022_I2037744 13000 n/a -
CMS_2021_I1901295 13000 45 -
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 11 -
CMS_2018_I1703993 13000 170 -
sumpt
 ATLAS_2022_I2152933 13000 19 -
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a -
Pouttop
 ATLAS_2019_I1750330 13000 9.4 -
ATLAS_2020_I1801434 13000 7.7 -
ATLAS_2022_I2077575 13000 1.2 -
Top pT
 ATLAS_2019_I1750330 13000 7.7 -
ATLAS_2020_I1801434 13000 7.4 -
ATLAS_2022_I2037744 13000 2.4 -
ATLAS_2022_I2077575 13000 1.5* -
CMS_2018_I1703993 13000 180 -
CMS_2021_I1901295 13000 36 -
top.pt.ttbarRF
 CMS_2018_I1703993 13000 180 -
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 11 -
Top rapidity
 ATLAS_2019_I1750330 13000 8.8 -
ATLAS_2020_I1801434 13000 9.1 -
ATLAS_2022_I2037744 13000 2.3 -
ATLAS_2022_I2077575 13000 1.6* -
CMS_2018_I1703993 13000 160 -
CMS_2021_I1901295 13000 33 -
topej.dphi
 ATLAS_2022_I2037744 13000 3.7 -
topej.m
 ATLAS_2022_I2037744 13000 2.2 -
χ(ttbar)
 ATLAS_2019_I1750330 13000 11 -
ATLAS_2020_I1801434 13000 9.1 -
ATLAS_2022_I2077575 13000 3.1* -
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 8.9 -
ATLAS_2020_I1801434 13000 8.7 -
ATLAS_2022_I2037744 13000 2.3 -
ATLAS_2022_I2077575 13000 1.5 -
CMS_2018_I1703993 13000 290 -
CMS_2021_I1901295 13000 49 -
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - 0.37
CMS_2018_I1703993 13000 170 -
CMS_2021_I1901295 13000 38 -
ttbar HT
 ATLAS_2019_I1750330 13000 7.1 -
ATLAS_2020_I1801434 13000 8.3 -
ATLAS_2022_I2037744 13000 1.7 -
ATLAS_2022_I2077575 13000 1.5 -
CMS_2021_I1901295 13000 32 -
m(ttbar)
 ATLAS_2019_I1750330 13000 6.0* -
ATLAS_2020_I1801434 13000 8.6 -
ATLAS_2022_I2037744 13000 1.7 -
ATLAS_2022_I2077575 13000 1.1* -
CMS_2018_I1703993 13000 170 -
CMS_2021_I1901295 13000 49 -
Pcrossttbar
 ATLAS_2020_I1801434 13000 7.9 -
ttbar pT
 ATLAS_2019_I1750330 13000 8.7 -
ATLAS_2020_I1801434 13000 7.8* -
ATLAS_2022_I2037744 13000 2.6 -
ATLAS_2022_I2077575 13000 1.2 -
CMS_2018_I1703993 13000 200 -
CMS_2021_I1901295 13000 31 -
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 7.0 -
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.9 -
CMS_2021_I1901295 13000 49 -
Ttbar rapidity
 ATLAS_2019_I1750330 13000 8.4 -
ATLAS_2020_I1801434 13000 5.9 -
ATLAS_2022_I2037744 13000 2.0 -
ATLAS_2022_I2077575 13000 2.0* -
CMS_2018_I1703993 13000 140 -
CMS_2021_I1901295 13000 44 -
Mean rapidity
 ATLAS_2019_I1750330 13000 12 -
ATLAS_2020_I1801434 13000 6.5 -
ATLAS_2022_I2077575 13000 1.8* -
ttbarej.ht
 ATLAS_2022_I2037744 13000 3.5 -
ttbarej.m
 CMS_2021_I1901295 13000 37 -
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 8.7 -
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 8.1 -
Cross sections
 ATLAS_2022_I2037744 13000 8.6 -
ATLAS_2022_I2077575 13000 6.0 -
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.