Generator / tune

Details for Pythia 6.427 375 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 1.1 -0.28 0.82
B jet
η
CMS_2018_I1703993 13000 37 +16 53
B jet
pT
CMS_2018_I1703993 13000 44 +17 61
bjbj.m
CMS_2018_I1703993 13000 51 +23 74
bjbj.pt
CMS_2018_I1703993 13000 47 +18 65
bjt.dphi
ATLAS_2022_I2037744 13000 1.9 -0.50 1.4
ej.pt
ATLAS_2022_I2037744 13000 2.6* +0.30 2.9*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 2.6 -0.10 2.5
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 3.7 -0.10 3.6
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 3.7 +0.100 3.8
ΔR(extra jets)
ATLAS_2020_I1801434 13000 2.3 -0.50 1.8
ejej.dphi
ATLAS_2022_I2037744 13000 1.3 -0.52 0.78
ejets.ht
CMS_2021_I1901295 13000 16 -5.0 11
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 3.8 +0.10 3.9
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 3.0 -0.20 2.8
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.52 -0.020 0.50
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.21 -0.020 0.19
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.50 +0.24 0.74
Jet pT
ATLAS_2014_I1304688 7000 17 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 2.5 -0.10 2.4
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.40 -0.030 0.37
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.9 -0.20 1.7
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.1 -0.10 1.0
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.8 0 1.8
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.4 +0.30 2.7
Lepton η
ATLAS_2019_I1759875 13000 33 +3.0 36
CMS_2018_I1703993 13000 23 +9.0 32
Lepton pT
ATLAS_2019_I1759875 13000 44 +5.0 49
CMS_2018_I1703993 13000 42 +18 60
CMS_2021_I1901295 13000 11 +1.0 12
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.3 -0.20 4.1
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 1.6 -0.20 1.4
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 6.0 -0.100 5.9
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 37 +3.0 40
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 32 +12 44
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 24 +5.0 29*
CMS_2018_I1703993 13000 42 +14 56
Dilepton
HT
ATLAS_2019_I1759875 13000 37 +4.0 41
Dilepton
m
ATLAS_2019_I1759875 13000 36 +2.0 38
CMS_2018_I1703993 13000 39 +15 54
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 38 +4.0 42
CMS_2018_I1703993 13000 36 +19 55
Dilepton
y
ATLAS_2019_I1759875 13000 30* +1.0 31*
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 2.7 -1.2 1.5
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 19 -2.0 17
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.8 +3.2 11
CMS_2018_I1703993 13000 35 +12 47
sumpt
ATLAS_2022_I2152933 13000 9.5 +5.5 15
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 7.0 -0.100 6.9
ATLAS_2020_I1801434 13000 5.4 -1.2 4.2*
ATLAS_2022_I2077575 13000 1.7 -0.40 1.3
Top pT
ATLAS_2019_I1750330 13000 6.6* -0.30 6.3*
ATLAS_2020_I1801434 13000 4.6* +1.2 5.8*
ATLAS_2022_I2037744 13000 2.0 -0.30 1.7*
ATLAS_2022_I2077575 13000 1.7* +0.10 1.8*
CMS_2018_I1703993 13000 64 +11 75
CMS_2021_I1901295 13000 21* -2.0 19*
top.pt.ttbarRF
CMS_2018_I1703993 13000 60 +13 73
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 5.3 +0.70 6.0
Top rapidity
ATLAS_2019_I1750330 13000 7.4 -0.40 7.0
ATLAS_2020_I1801434 13000 5.4 +1.5 6.9
ATLAS_2022_I2037744 13000 1.7* +0.70 2.4
ATLAS_2022_I2077575 13000 1.7* 0 1.7*
CMS_2018_I1703993 13000 58 +10 68
CMS_2021_I1901295 13000 19 +1.0 20
topej.dphi
ATLAS_2022_I2037744 13000 2.3 0 2.3
topej.m
ATLAS_2022_I2037744 13000 1.2 +0.10 1.3
χ(ttbar)
ATLAS_2019_I1750330 13000 7.7 +0.30 8.0
ATLAS_2020_I1801434 13000 4.4 +0.70 5.1
ATLAS_2022_I2077575 13000 1.3 +0.100 1.4
Δφ(ttbar)
ATLAS_2019_I1750330 13000 6.7 -0.40 6.3
ATLAS_2020_I1801434 13000 6.5 +2.8 9.3
ATLAS_2022_I2037744 13000 2.0 +2.3 4.3
ATLAS_2022_I2077575 13000 2.0 +0.20 2.2
CMS_2018_I1703993 13000 87 +23 110
CMS_2021_I1901295 13000 29 -2.0 27
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 67 +11 78
CMS_2021_I1901295 13000 21 0 21
ttbar HT
ATLAS_2019_I1750330 13000 5.8 +0.10 5.9
ATLAS_2020_I1801434 13000 4.7 +0.90 5.6
ATLAS_2022_I2037744 13000 n/a - 1.6
ATLAS_2022_I2077575 13000 1.5 +0.20 1.7
CMS_2021_I1901295 13000 n/a - 19
m(ttbar)
ATLAS_2019_I1750330 13000 6.1* -0.40 5.7
ATLAS_2020_I1801434 13000 4.7 +1.1 5.8
ATLAS_2022_I2037744 13000 2.5 - n/a
ATLAS_2022_I2077575 13000 1.5* +0.40 1.9*
CMS_2018_I1703993 13000 68 +13 81
CMS_2021_I1901295 13000 28* -1.0 27
Pcrossttbar
ATLAS_2020_I1801434 13000 5.7 +2.0 7.7
ttbar pT
ATLAS_2019_I1750330 13000 6.9 +0.30 7.2*
ATLAS_2020_I1801434 13000 5.4 +0.50 5.9
ATLAS_2022_I2037744 13000 1.6 +2.3 3.9
ATLAS_2022_I2077575 13000 1.7* -0.30 1.4*
CMS_2018_I1703993 13000 59 +18 77
CMS_2021_I1901295 13000 18* -3.0 15
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 5.1 +1.0 6.1
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.4* -1.0 1.4
CMS_2021_I1901295 13000 28 0 28
Ttbar rapidity
ATLAS_2019_I1750330 13000 6.7 +0.20 6.9
ATLAS_2020_I1801434 13000 3.3 +0.50 3.8*
ATLAS_2022_I2037744 13000 n/a - 3.5
ATLAS_2022_I2077575 13000 1.4 +0.50 1.9
CMS_2018_I1703993 13000 53 +10 63
CMS_2021_I1901295 13000 25 0 25
Mean rapidity
ATLAS_2019_I1750330 13000 9.3 -0.30 9.0
ATLAS_2020_I1801434 13000 3.7 +2.1 5.8
ATLAS_2022_I2077575 13000 1.4 +1.9 3.3
ttbarej.ht
ATLAS_2022_I2037744 13000 2.9 0 2.9
ttbarej.m
CMS_2021_I1901295 13000 n/a - 18
pT ratio
W to b
ATLAS_2020_I1801434 13000 4.2 +1.5 5.7
pT ratio
W to top
ATLAS_2020_I1801434 13000 4.9 +1.0 5.9
Cross sections
ATLAS_2022_I2037744 13000 7.9 +5.1 13
ATLAS_2022_I2077575 13000 6.6 +0.10 6.7
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.