Generator / tune

Details for Pythia 6.427 default 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 0.23 - n/a
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 1.2 - n/a
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 1.2 - n/a
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 0.76 - n/a
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 0.25 - n/a
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 0.23 - n/a
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 - 0.18
B jet
 η
 CMS_2018_I1703993 13000 - 160
B jet
 pT
 CMS_2018_I1703993 13000 - 200
bjbj.m
 CMS_2018_I1703993 13000 - 250
bjbj.pt
 CMS_2018_I1703993 13000 - 210
bjt.dphi
 ATLAS_2022_I2037744 13000 - 1.3
ej.pt
 ATLAS_2022_I2037744 13000 - 3.1
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 - 6.0
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 - 6.0
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 - 6.2
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 - 4.8
ejej.dphi
 ATLAS_2022_I2037744 13000 - 0.52
ejets.ht
 CMS_2021_I1901295 13000 - 30
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 - 6.8
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 - 4.9
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.17 -0.020 0.15
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.096 -0.0040 0.092
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 74 - n/a
CMS_2019_I1764472 13000 - 2.7
Jet pT
 ATLAS_2014_I1304688 7000 28 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 1.2 -0.100 1.1
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.24 -0.0100 0.23
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.4 +0.30 1.7
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.80 +0.12 0.92
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.1 +0.60 1.7
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 1.5 +0.30 1.8
Lepton η
 ATLAS_2019_I1759875 13000 - 40
CMS_2018_I1703993 13000 - 96
Lepton pT
 ATLAS_2019_I1759875 13000 - 53
CMS_2018_I1703993 13000 - 200
CMS_2021_I1901295 13000 - 19
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 4.1 +0.60 4.7
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.40 +0.14 0.54
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 5.1 +0.30 5.4
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 - 44
Dilepton
 Δη
 CMS_2016_I1430892 8000 0.23 - n/a
CMS_2018_I1703993 13000 - 140
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 - 27
CMS_2018_I1703993 13000 - 160
Dilepton
 HT
 ATLAS_2019_I1759875 13000 - 43
Dilepton
 m
 ATLAS_2019_I1759875 13000 - 42
CMS_2018_I1703993 13000 - 170
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 - 44
CMS_2018_I1703993 13000 - 160
Dilepton
 y
 ATLAS_2019_I1759875 13000 - 32
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 - 18
Jet Multiplicities
 Extra jets multiplicity
 ATLAS_2019_I1750330 13000 - n/a
ATLAS_2022_I2037744 13000 - n/a
CMS_2021_I1901295 13000 - 40
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 - 7.8
CMS_2018_I1703993 13000 - 170
sumpt
 ATLAS_2022_I2152933 13000 - 21
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 - n/a
Pouttop
 ATLAS_2019_I1750330 13000 - 9.2
ATLAS_2020_I1801434 13000 - 6.5*
ATLAS_2022_I2077575 13000 - 2.3
Top pT
 ATLAS_2019_I1750330 13000 - 7.7*
ATLAS_2020_I1801434 13000 - 5.4
ATLAS_2022_I2037744 13000 - 2.9
ATLAS_2022_I2077575 13000 - 1.7*
CMS_2018_I1703993 13000 - 190
CMS_2021_I1901295 13000 - 35*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 - 190
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 - 6.2
Top rapidity
 ATLAS_2019_I1750330 13000 - 9.0
ATLAS_2020_I1801434 13000 - 6.5
ATLAS_2022_I2037744 13000 - 1.8*
ATLAS_2022_I2077575 13000 - 1.8*
CMS_2018_I1703993 13000 - 160
CMS_2021_I1901295 13000 - 33
topej.dphi
 ATLAS_2022_I2037744 13000 - 3.5
topej.m
 ATLAS_2022_I2037744 13000 - 1.8
χ(ttbar)
 ATLAS_2019_I1750330 13000 - 11
ATLAS_2020_I1801434 13000 - 5.9
ATLAS_2022_I2077575 13000 - 2.9*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 - 9.2
ATLAS_2020_I1801434 13000 - 5.8
ATLAS_2022_I2037744 13000 - 1.6
ATLAS_2022_I2077575 13000 - 2.1
CMS_2018_I1703993 13000 - 300
CMS_2021_I1901295 13000 - 48
Δy (ttbar)
 CMS_2016_I1430892 8000 0.37 - n/a
CMS_2018_I1703993 13000 - 180
CMS_2021_I1901295 13000 - 35
ttbar HT
 ATLAS_2019_I1750330 13000 - 7.4
ATLAS_2020_I1801434 13000 - 5.5
ATLAS_2022_I2037744 13000 - n/a
ATLAS_2022_I2077575 13000 - 1.7
CMS_2021_I1901295 13000 - 31
m(ttbar)
 ATLAS_2019_I1750330 13000 - 6.0
ATLAS_2020_I1801434 13000 - 5.5
ATLAS_2022_I2037744 13000 - 2.2
ATLAS_2022_I2077575 13000 - 1.5*
CMS_2018_I1703993 13000 - 180
CMS_2021_I1901295 13000 - 48
Pcrossttbar
 ATLAS_2020_I1801434 13000 - 5.6
ttbar pT
 ATLAS_2019_I1750330 13000 - 9.0
ATLAS_2020_I1801434 13000 - 4.8
ATLAS_2022_I2037744 13000 - 1.9
ATLAS_2022_I2077575 13000 - 1.9*
CMS_2018_I1703993 13000 - 200
CMS_2021_I1901295 13000 - 29
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 - 6.8
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 - 2.1
CMS_2021_I1901295 13000 - 48
Ttbar rapidity
 ATLAS_2019_I1750330 13000 - 8.4
ATLAS_2020_I1801434 13000 - 4.8
ATLAS_2022_I2037744 13000 - 0.97
ATLAS_2022_I2077575 13000 - 2.3
CMS_2018_I1703993 13000 - 150
CMS_2021_I1901295 13000 - 43
Mean rapidity
 ATLAS_2019_I1750330 13000 - 12
ATLAS_2020_I1801434 13000 - 4.7
ATLAS_2022_I2077575 13000 - 2.6
ttbarej.ht
 ATLAS_2022_I2037744 13000 - 4.4
ttbarej.m
 CMS_2021_I1901295 13000 - 36
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 - 7.1
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 - 6.3
Cross sections
 ATLAS_2022_I2037744 13000 - 4.7
ATLAS_2022_I2077575 13000 - 9.5
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.