Generator / tune

Details for Pythia 6.427 359 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 1.5 - n/a
B jet
η
CMS_2018_I1703993 13000 50 -2.0 48
B jet
pT
CMS_2018_I1703993 13000 60 -4.0 56
bjbj.m
CMS_2018_I1703993 13000 71 +1.0 72
bjbj.pt
CMS_2018_I1703993 13000 63 -2.0 61
bjt.dphi
ATLAS_2022_I2037744 13000 1.3 +1.1 2.4
ej.pt
ATLAS_2022_I2037744 13000 2.7* +0.30 3.0*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 2.4 +0.70 3.1
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 3.1 +0.30 3.4
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 2.5 +0.50 3.0
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.5 +1.0 2.5
ejej.dphi
ATLAS_2022_I2037744 13000 0.97 -0.30 0.67
ejets.ht
CMS_2021_I1901295 13000 17 -5.0 12
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 3.9 +0.20 4.1
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 2.2 +0.20 2.4
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.35 +0.33 0.68
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.14 +0.12 0.26
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.68 +0.72 1.4
Jet pT
ATLAS_2014_I1304688 7000 17 -1.0 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 2.0 +0.30 2.3
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.34 +0.050 0.39
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.5 0 1.5
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.85 -0.040 0.81
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.4 +0.10 1.5
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.4 -0.40 2.0
Lepton η
ATLAS_2019_I1759875 13000 39 -7.0 32
CMS_2018_I1703993 13000 29 +1.0 30
Lepton pT
ATLAS_2019_I1759875 13000 52 -10 42
CMS_2018_I1703993 13000 56 -2.0 54
CMS_2021_I1901295 13000 13 0 13
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 5.9 -0.20 5.7
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.80 +0.070 0.87
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 8.6 -1.0 7.6
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 41 -6.0 35
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 43 -2.0 41
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 29* -6.0 23
CMS_2018_I1703993 13000 49 0 49
Dilepton
HT
ATLAS_2019_I1759875 13000 42 -7.0 35
Dilepton
m
ATLAS_2019_I1759875 13000 39 -6.0 33
CMS_2018_I1703993 13000 50 0 50
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 43 -7.0 36
CMS_2018_I1703993 13000 46 0 46
Dilepton
y
ATLAS_2019_I1759875 13000 30 -5.0 25
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 2.4 +1.5 3.9
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 22 -3.0 19
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.6 +0.80 8.4
CMS_2018_I1703993 13000 46 -2.0 44
sumpt
ATLAS_2022_I2152933 13000 1.9 +2.3 4.2
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 7.8 -0.30 7.5
ATLAS_2020_I1801434 13000 4.9 +0.90 5.8
ATLAS_2022_I2077575 13000 2.0* 0 2.0*
Top pT
ATLAS_2019_I1750330 13000 6.5* +0.20 6.7*
ATLAS_2020_I1801434 13000 4.8 -0.100 4.7*
ATLAS_2022_I2037744 13000 1.3 +1.4 2.7
ATLAS_2022_I2077575 13000 1.5* -0.10 1.4*
CMS_2018_I1703993 13000 73 -2.0 71
CMS_2021_I1901295 13000 23* -3.0 20*
top.pt.ttbarRF
CMS_2018_I1703993 13000 71 0 71
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 5.0 0 5.0
Top rapidity
ATLAS_2019_I1750330 13000 7.7 0 7.7
ATLAS_2020_I1801434 13000 5.3 +0.70 6.0
ATLAS_2022_I2037744 13000 1.1* +0.40 1.5
ATLAS_2022_I2077575 13000 1.9* -0.30 1.6*
CMS_2018_I1703993 13000 70 -4.0 66
CMS_2021_I1901295 13000 23 -2.0 21
topej.dphi
ATLAS_2022_I2037744 13000 2.3 +0.60 2.9
topej.m
ATLAS_2022_I2037744 13000 0.97 +0.13 1.1
χ(ttbar)
ATLAS_2019_I1750330 13000 7.9 +0.70 8.6
ATLAS_2020_I1801434 13000 4.3 +0.70 5.0
ATLAS_2022_I2077575 13000 2.5* -0.40 2.1*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 7.1 -0.40 6.7
ATLAS_2020_I1801434 13000 6.2 +1.9 8.1
ATLAS_2022_I2037744 13000 2.6 +2.5 5.1
ATLAS_2022_I2077575 13000 2.1 -0.50 1.6
CMS_2018_I1703993 13000 100 0 100
CMS_2021_I1901295 13000 31 -2.0 29
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 76 -3.0 73
CMS_2021_I1901295 13000 22 +1.0 23
ttbar HT
ATLAS_2019_I1750330 13000 6.2 -0.20 6.0
ATLAS_2020_I1801434 13000 4.9 +0.60 5.5
ATLAS_2022_I2037744 13000 1.5 - n/a
ATLAS_2022_I2077575 13000 n/a - 2.4*
CMS_2021_I1901295 13000 22 -1.0 21
m(ttbar)
ATLAS_2019_I1750330 13000 5.8 -0.100 5.7
ATLAS_2020_I1801434 13000 4.7 -0.10 4.6
ATLAS_2022_I2037744 13000 1.4 +0.70 2.1
ATLAS_2022_I2077575 13000 1.8* -0.40 1.4*
CMS_2018_I1703993 13000 83 -5.0 78
CMS_2021_I1901295 13000 27 0 27
Pcrossttbar
ATLAS_2020_I1801434 13000 5.1 +0.30 5.4
ttbar pT
ATLAS_2019_I1750330 13000 7.5 -0.40 7.1
ATLAS_2020_I1801434 13000 4.7 +0.30 5.0
ATLAS_2022_I2037744 13000 2.8 -0.70 2.1
ATLAS_2022_I2077575 13000 1.8* -0.70 1.1
CMS_2018_I1703993 13000 67 -1.0 66
CMS_2021_I1901295 13000 20 -2.0 18
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 6.3 -2.3 4.0
ttbar.thetaStar
ATLAS_2022_I2077575 13000 1.8 +0.20 2.0*
CMS_2021_I1901295 13000 29 0 29
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.2 -0.10 7.1
ATLAS_2020_I1801434 13000 2.7 +0.60 3.3
ATLAS_2022_I2037744 13000 0.93 +1.2 2.1
ATLAS_2022_I2077575 13000 2.2 -0.80 1.4
CMS_2018_I1703993 13000 65 -5.0 60
CMS_2021_I1901295 13000 26 0 26
Mean rapidity
ATLAS_2019_I1750330 13000 10 -0.50 9.5
ATLAS_2020_I1801434 13000 3.5 +0.50 4.0
ATLAS_2022_I2077575 13000 1.8 -0.60 1.2
ttbarej.ht
ATLAS_2022_I2037744 13000 0.98 +3.1 4.1
ttbarej.m
CMS_2021_I1901295 13000 24 -4.0 20
pT ratio
W to b
ATLAS_2020_I1801434 13000 4.7 0 4.7
pT ratio
W to top
ATLAS_2020_I1801434 13000 4.5 0 4.5
Cross sections
ATLAS_2022_I2037744 13000 5.0 +5.0 10
ATLAS_2022_I2077575 13000 8.2 -3.4 4.8
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.