Generator / tune

Details for Pythia 6.426 357 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 n/a - n/a
B jet
η
CMS_2018_I1703993 13000 44 +2.0 46
B jet
pT
CMS_2018_I1703993 13000 54 +4.0 58
bjbj.m
CMS_2018_I1703993 13000 63 +13 76
bjbj.pt
CMS_2018_I1703993 13000 58 +4.0 62
bjt.dphi
ATLAS_2022_I2037744 13000 n/a - 2.1
ej.pt
ATLAS_2022_I2037744 13000 2.5* +0.30 2.8*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 3.6 -0.60 3.0
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 4.0 -0.40 3.6
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 4.0 -0.80 3.2
ΔR(extra jets)
ATLAS_2020_I1801434 13000 3.6 -0.80 2.8
ejej.dphi
ATLAS_2022_I2037744 13000 1.9 -0.20 1.7
ejets.ht
CMS_2021_I1901295 13000 14 +2.0 16
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 4.2 -0.50 3.7
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 3.9 -1.2 2.7
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.45 -0.20 0.25
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.30 -0.15 0.15
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.2 -0.66 0.54
Jet pT
ATLAS_2014_I1304688 7000 16 0 16
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 0.46 -0.070 0.39
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.6 -0.10 1.5
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.92 -0.020 0.90
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.6 +0.100 1.7
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.3 +0.10 2.4
Lepton η
ATLAS_2019_I1759875 13000 34 +1.0 35
CMS_2018_I1703993 13000 28 +1.0 29
Lepton pT
ATLAS_2019_I1759875 13000 47 +2.0 49
CMS_2018_I1703993 13000 50 +3.0 53
CMS_2021_I1901295 13000 14 -2.0 12
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.8 +1.3 6.1
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.97 0 0.97
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 6.3 +1.3 7.6
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 39 +1.0 40
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 37 +2.0 39
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 23 +2.0 25
CMS_2018_I1703993 13000 44 +1.0 45
Dilepton
HT
ATLAS_2019_I1759875 13000 38 +1.0 39
Dilepton
m
ATLAS_2019_I1759875 13000 37 -1.0 36
CMS_2018_I1703993 13000 45 +3.0 48
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 38 +1.0 39
CMS_2018_I1703993 13000 44 0 44
Dilepton
y
ATLAS_2019_I1759875 13000 30* -2.0 28
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 5.3 -2.9 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 21 -2.0 19
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.1 -0.50 5.6
CMS_2018_I1703993 13000 40 +8.0 48
sumpt
ATLAS_2022_I2152933 13000 4.5 -1.4 3.1
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 7.6 -0.40 7.2
ATLAS_2020_I1801434 13000 4.5 -0.70 3.8
ATLAS_2022_I2077575 13000 1.9* +0.80 2.7*
Top pT
ATLAS_2019_I1750330 13000 6.5* -0.80 5.7*
ATLAS_2020_I1801434 13000 4.6 -0.60 4.0
ATLAS_2022_I2037744 13000 1.9 -0.90 1.0*
ATLAS_2022_I2077575 13000 1.3* +0.100 1.4*
CMS_2018_I1703993 13000 70 +3.0 73
CMS_2021_I1901295 13000 23* -3.0 20
top.pt.ttbarRF
CMS_2018_I1703993 13000 68 +4.0 72
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 5.1 +0.70 5.8
Top rapidity
ATLAS_2019_I1750330 13000 8.0 -0.80 7.2
ATLAS_2020_I1801434 13000 5.8 -0.70 5.1
ATLAS_2022_I2037744 13000 1.9 +0.10 2.0*
ATLAS_2022_I2077575 13000 1.5* +0.40 1.9*
CMS_2018_I1703993 13000 65 +4.0 69
CMS_2021_I1901295 13000 23 -3.0 20
topej.dphi
ATLAS_2022_I2037744 13000 2.5 +0.30 2.8
topej.m
ATLAS_2022_I2037744 13000 2.2 -0.90 1.3
χ(ttbar)
ATLAS_2019_I1750330 13000 8.6 -1.0 7.6
ATLAS_2020_I1801434 13000 5.9 -1.2 4.7
ATLAS_2022_I2077575 13000 1.8* +0.100 1.9
Δφ(ttbar)
ATLAS_2019_I1750330 13000 7.0 -0.30 6.7
ATLAS_2020_I1801434 13000 4.9 +0.100 5.0
ATLAS_2022_I2037744 13000 3.5 - n/a
ATLAS_2022_I2077575 13000 1.7 -0.20 1.5
CMS_2018_I1703993 13000 97 +13 110
CMS_2021_I1901295 13000 31 0 31
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 71 +5.0 76
CMS_2021_I1901295 13000 24 -3.0 21
ttbar HT
ATLAS_2019_I1750330 13000 6.5 -0.70 5.8
ATLAS_2020_I1801434 13000 4.6 -0.60 4.0
ATLAS_2022_I2037744 13000 n/a - 1.5
ATLAS_2022_I2077575 13000 2.0* -0.40 1.6
CMS_2021_I1901295 13000 n/a - 21
m(ttbar)
ATLAS_2019_I1750330 13000 5.8* -0.90 4.9*
ATLAS_2020_I1801434 13000 5.2 -1.4 3.8
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 1.4* +0.20 1.6*
CMS_2018_I1703993 13000 75 +5.0 80
CMS_2021_I1901295 13000 30* -6.0 24
Pcrossttbar
ATLAS_2020_I1801434 13000 4.7 -0.20 4.5
ttbar pT
ATLAS_2019_I1750330 13000 7.0 -0.40 6.6
ATLAS_2020_I1801434 13000 4.5 -0.70 3.8
ATLAS_2022_I2037744 13000 1.3 +0.50 1.8
ATLAS_2022_I2077575 13000 1.3* +0.30 1.6*
CMS_2018_I1703993 13000 62 +3.0 65
CMS_2021_I1901295 13000 20 -1.0 19
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 5.7 -1.3 4.4
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.4* -0.30 2.1
CMS_2021_I1901295 13000 32 -5.0 27
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.3 -0.70 6.6
ATLAS_2020_I1801434 13000 3.4 -0.10 3.3
ATLAS_2022_I2037744 13000 1.5 +0.70 2.2
ATLAS_2022_I2077575 13000 1.5 +0.50 2.0
CMS_2018_I1703993 13000 60 +2.0 62
CMS_2021_I1901295 13000 28 -4.0 24
Mean rapidity
ATLAS_2019_I1750330 13000 10 -0.50 9.5
ATLAS_2020_I1801434 13000 4.1 -0.40 3.7
ATLAS_2022_I2077575 13000 1.4 +0.60 2.0
ttbarej.ht
ATLAS_2022_I2037744 13000 1.7 +0.30 2.0
ttbarej.m
CMS_2021_I1901295 13000 21 -1.0 20
pT ratio
W to b
ATLAS_2020_I1801434 13000 5.1 -0.50 4.6
pT ratio
W to top
ATLAS_2020_I1801434 13000 4.8 +0.40 5.2
Cross sections
ATLAS_2022_I2037744 13000 7.2 +0.60 7.8
ATLAS_2022_I2077575 13000 6.0 +1.1 7.1
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.