Generator / tune

Details for Pythia 6.426 359 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 - 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 1.3 +0.20 1.5
B jet
η
CMS_2018_I1703993 13000 51 -1.0 50
B jet
pT
CMS_2018_I1703993 13000 58 +2.0 60
bjbj.m
CMS_2018_I1703993 13000 71 0 71
bjbj.pt
CMS_2018_I1703993 13000 65 -2.0 63
bjt.dphi
ATLAS_2022_I2037744 13000 0.97 +0.33 1.3
ej.pt
ATLAS_2022_I2037744 13000 2.3 +0.40 2.7*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 2.9 -0.50 2.4
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 2.6 +0.50 3.1
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 2.5 0 2.5
ΔR(extra jets)
ATLAS_2020_I1801434 13000 2.1 -0.60 1.5
ejej.dphi
ATLAS_2022_I2037744 13000 1.1 -0.13 0.97
ejets.ht
CMS_2021_I1901295 13000 15 +2.0 17
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 4.1 -0.20 3.9
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 2.4 -0.20 2.2
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.57 -0.22 0.35
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.23 -0.090 0.14
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.2 -0.52 0.68
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 2.3 -0.30 2.0
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.42 -0.080 0.34
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.8 -0.30 1.5
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.95 -0.100 0.85
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.7 -0.30 1.4
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.8 -0.40 2.4
Lepton η
ATLAS_2019_I1759875 13000 36 +3.0 39
CMS_2018_I1703993 13000 31 -2.0 29
Lepton pT
ATLAS_2019_I1759875 13000 48 +4.0 52
CMS_2018_I1703993 13000 59 -3.0 56
CMS_2021_I1901295 13000 13 0 13
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 5.4 +0.50 5.9
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.81 -0.010 0.80
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 7.0 +1.6 8.6
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 42 -1.0 41
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 45 -2.0 43
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 26 +3.0 29*
CMS_2018_I1703993 13000 55 -6.0 49
Dilepton
HT
ATLAS_2019_I1759875 13000 40 +2.0 42
Dilepton
m
ATLAS_2019_I1759875 13000 38 +1.0 39
CMS_2018_I1703993 13000 53 -3.0 50
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 40 +3.0 43
CMS_2018_I1703993 13000 48 -2.0 46
Dilepton
y
ATLAS_2019_I1759875 13000 29 +1.0 30
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 4.3 -1.9 2.4
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 20 +2.0 22
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 5.4 +2.2 7.6
CMS_2018_I1703993 13000 46 0 46
sumpt
ATLAS_2022_I2152933 13000 3.7 -1.8 1.9
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 7.5 +0.30 7.8
ATLAS_2020_I1801434 13000 3.9 +1.0 4.9
ATLAS_2022_I2077575 13000 1.4 +0.60 2.0*
Top pT
ATLAS_2019_I1750330 13000 6.8* -0.30 6.5*
ATLAS_2020_I1801434 13000 3.6* +1.2 4.8
ATLAS_2022_I2037744 13000 1.4 -0.100 1.3
ATLAS_2022_I2077575 13000 1.7* -0.20 1.5*
CMS_2018_I1703993 13000 74 -1.0 73
CMS_2021_I1901295 13000 21 +2.0 23*
top.pt.ttbarRF
CMS_2018_I1703993 13000 71 0 71
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 4.2 +0.80 5.0
Top rapidity
ATLAS_2019_I1750330 13000 7.4 +0.30 7.7
ATLAS_2020_I1801434 13000 4.3 +1.0 5.3
ATLAS_2022_I2037744 13000 1.0 +0.10 1.1*
ATLAS_2022_I2077575 13000 2.0* -0.10 1.9*
CMS_2018_I1703993 13000 68 +2.0 70
CMS_2021_I1901295 13000 22 +1.0 23
topej.dphi
ATLAS_2022_I2037744 13000 2.7 -0.40 2.3
topej.m
ATLAS_2022_I2037744 13000 1.2 -0.23 0.97
χ(ttbar)
ATLAS_2019_I1750330 13000 7.8 +0.10 7.9
ATLAS_2020_I1801434 13000 4.3 0 4.3
ATLAS_2022_I2077575 13000 2.0* +0.50 2.5*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 7.1 0 7.1
ATLAS_2020_I1801434 13000 4.7 +1.5 6.2
ATLAS_2022_I2037744 13000 2.5 +0.10 2.6
ATLAS_2022_I2077575 13000 1.7 +0.40 2.1
CMS_2018_I1703993 13000 100 0 100
CMS_2021_I1901295 13000 30 +1.0 31
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 74 +2.0 76
CMS_2021_I1901295 13000 22 0 22
ttbar HT
ATLAS_2019_I1750330 13000 6.1 +0.10 6.2
ATLAS_2020_I1801434 13000 3.2 +1.7 4.9
ATLAS_2022_I2037744 13000 n/a - 1.5
ATLAS_2022_I2077575 13000 2.1* - n/a
CMS_2021_I1901295 13000 22 0 22
m(ttbar)
ATLAS_2019_I1750330 13000 5.0* +0.80 5.8
ATLAS_2020_I1801434 13000 3.9 +0.80 4.7
ATLAS_2022_I2037744 13000 0.62 +0.78 1.4
ATLAS_2022_I2077575 13000 1.5* +0.30 1.8*
CMS_2018_I1703993 13000 82 +1.0 83
CMS_2021_I1901295 13000 28* -1.0 27
Pcrossttbar
ATLAS_2020_I1801434 13000 3.7 +1.4 5.1
ttbar pT
ATLAS_2019_I1750330 13000 6.9 +0.60 7.5
ATLAS_2020_I1801434 13000 4.1 +0.60 4.7
ATLAS_2022_I2037744 13000 2.2 +0.60 2.8
ATLAS_2022_I2077575 13000 1.5 +0.30 1.8*
CMS_2018_I1703993 13000 67 0 67
CMS_2021_I1901295 13000 18 +2.0 20
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 3.7 +2.6 6.3
ttbar.thetaStar
ATLAS_2022_I2077575 13000 1.6 +0.20 1.8
CMS_2021_I1901295 13000 30 -1.0 29
Ttbar rapidity
ATLAS_2019_I1750330 13000 6.9 +0.30 7.2
ATLAS_2020_I1801434 13000 2.3 +0.40 2.7
ATLAS_2022_I2037744 13000 1.9 -0.97 0.93
ATLAS_2022_I2077575 13000 1.9 +0.30 2.2
CMS_2018_I1703993 13000 63 +2.0 65
CMS_2021_I1901295 13000 26 0 26
Mean rapidity
ATLAS_2019_I1750330 13000 10 0 10
ATLAS_2020_I1801434 13000 3.1 +0.40 3.5
ATLAS_2022_I2077575 13000 1.5 +0.30 1.8
ttbarej.ht
ATLAS_2022_I2037744 13000 1.3 -0.32 0.98
ttbarej.m
CMS_2021_I1901295 13000 21 +3.0 24
pT ratio
W to b
ATLAS_2020_I1801434 13000 3.7 +1.0 4.7
pT ratio
W to top
ATLAS_2020_I1801434 13000 3.8 +0.70 4.5
Cross sections
ATLAS_2022_I2037744 13000 3.3 +1.7 5.0
ATLAS_2022_I2077575 13000 6.3 +1.9 8.2
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.