Generator / tune

Details for Pythia 6.427 371 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 n/a - 0.28
B jet
η
CMS_2018_I1703993 13000 46 -3.0 43
B jet
pT
CMS_2018_I1703993 13000 57 -11 46
bjbj.m
CMS_2018_I1703993 13000 66 -9.0 57
bjbj.pt
CMS_2018_I1703993 13000 58 -7.0 51
bjt.dphi
ATLAS_2022_I2037744 13000 1.5 +2.5 4.0
ej.pt
ATLAS_2022_I2037744 13000 2.7* +0.70 3.4*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 2.6 -0.80 1.8
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 2.5 -0.20 2.3
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 2.2 -0.20 2.0
ΔR(extra jets)
ATLAS_2020_I1801434 13000 2.5 -0.20 2.3
ejej.dphi
ATLAS_2022_I2037744 13000 1.0 +1.8 2.8
ejets.ht
CMS_2021_I1901295 13000 10 -0.60 9.4
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 3.6 +0.70 4.3
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 2.5 -0.90 1.6
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.60 +0.020 0.62
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.36 -0.030 0.33
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.1 +0.100 1.2
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 9.5 +0.100 9.6
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 2.2 +0.100 2.3
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.9 +0.20 2.1
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.4 +0.10 1.5
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 2.1 -0.20 1.9
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.6 +0.10 2.7
Lepton η
ATLAS_2019_I1759875 13000 38 -3.0 35
CMS_2018_I1703993 13000 28 -2.0 26
Lepton pT
ATLAS_2019_I1759875 13000 51 -5.0 46
CMS_2018_I1703993 13000 52 -7.0 45
CMS_2021_I1901295 13000 12 +1.0 13
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 8.8 +0.100 8.9
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 1.9 -0.20 1.7
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 12 0 12
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 40 -2.0 38
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 38 -4.0 34
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 24 -2.0 22
CMS_2018_I1703993 13000 45 -6.0 39
Dilepton
HT
ATLAS_2019_I1759875 13000 41 -4.0 37
Dilepton
m
ATLAS_2019_I1759875 13000 39 -4.0 35
CMS_2018_I1703993 13000 49 -9.0 40
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 40 -3.0 37
CMS_2018_I1703993 13000 43 -6.0 37
Dilepton
y
ATLAS_2019_I1759875 13000 30 +3.0 33*
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 5.3 -0.40 4.9
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 18 +2.0 20
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.8 +2.2 10
CMS_2018_I1703993 13000 53 -11 42
sumpt
ATLAS_2022_I2152933 13000 4.0 +0.100 4.1
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 7.3 +1.0 8.3
ATLAS_2020_I1801434 13000 5.4 +1.6 7.0
ATLAS_2022_I2077575 13000 2.4* -1.5 0.88
Top pT
ATLAS_2019_I1750330 13000 6.2 +1.2 7.4*
ATLAS_2020_I1801434 13000 4.3 +1.4 5.7
ATLAS_2022_I2037744 13000 2.2 +1.4 3.6
ATLAS_2022_I2077575 13000 1.4* -0.20 1.2*
CMS_2018_I1703993 13000 75 -11 64
CMS_2021_I1901295 13000 20* +3.0 23*
top.pt.ttbarRF
CMS_2018_I1703993 13000 70 -9.0 61
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 4.9 +0.50 5.4
Top rapidity
ATLAS_2019_I1750330 13000 8.1 +0.40 8.5
ATLAS_2020_I1801434 13000 4.5 -0.40 4.1
ATLAS_2022_I2037744 13000 1.9* +0.30 2.2
ATLAS_2022_I2077575 13000 1.5* -0.30 1.2*
CMS_2018_I1703993 13000 67 -7.0 60
CMS_2021_I1901295 13000 20 0 20
topej.dphi
ATLAS_2022_I2037744 13000 2.4 +1.3 3.7
topej.m
ATLAS_2022_I2037744 13000 2.2 +1.4 3.6
χ(ttbar)
ATLAS_2019_I1750330 13000 9.6 -0.60 9.0
ATLAS_2020_I1801434 13000 4.1 +1.7 5.8
ATLAS_2022_I2077575 13000 2.2* -1.3 0.91*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 7.6 -0.80 6.8
ATLAS_2020_I1801434 13000 6.7 +2.6 9.3
ATLAS_2022_I2037744 13000 2.9 +3.4 6.3
ATLAS_2022_I2077575 13000 1.7 -0.50 1.2
CMS_2018_I1703993 13000 110 -17 93
CMS_2021_I1901295 13000 26 0 26
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 77 -13 64
CMS_2021_I1901295 13000 22 +2.0 24
ttbar HT
ATLAS_2019_I1750330 13000 6.7 +0.20 6.9
ATLAS_2020_I1801434 13000 4.5 -0.100 4.4
ATLAS_2022_I2037744 13000 n/a - 2.7
ATLAS_2022_I2077575 13000 1.6 - n/a
CMS_2021_I1901295 13000 19 - n/a
m(ttbar)
ATLAS_2019_I1750330 13000 5.7* +1.0 6.7
ATLAS_2020_I1801434 13000 4.3 +0.50 4.8
ATLAS_2022_I2037744 13000 n/a - 3.0
ATLAS_2022_I2077575 13000 1.5* -0.10 1.4*
CMS_2018_I1703993 13000 81 -8.0 73
CMS_2021_I1901295 13000 28* +4.0 32*
Pcrossttbar
ATLAS_2020_I1801434 13000 4.6 +1.5 6.1
ttbar pT
ATLAS_2019_I1750330 13000 7.2 +0.70 7.9
ATLAS_2020_I1801434 13000 4.5 +1.0 5.5
ATLAS_2022_I2037744 13000 2.8 +1.1 3.9
ATLAS_2022_I2077575 13000 1.3* +0.30 1.6*
CMS_2018_I1703993 13000 73 -10 63
CMS_2021_I1901295 13000 18 +1.0 19*
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 3.3 +2.5 5.8
ttbar.thetaStar
ATLAS_2022_I2077575 13000 1.9 -0.80 1.1
CMS_2021_I1901295 13000 28 +2.0 30
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.3 +0.50 7.8
ATLAS_2020_I1801434 13000 2.8 +0.80 3.6*
ATLAS_2022_I2037744 13000 2.3 +0.40 2.7
ATLAS_2022_I2077575 13000 2.2* -0.80 1.4
CMS_2018_I1703993 13000 61 -7.0 54
CMS_2021_I1901295 13000 25 +2.0 27
Mean rapidity
ATLAS_2019_I1750330 13000 9.8 -0.60 9.2
ATLAS_2020_I1801434 13000 3.6 -0.20 3.4
ATLAS_2022_I2077575 13000 2.7* -1.1 1.6
ttbarej.ht
ATLAS_2022_I2037744 13000 3.4 +1.2 4.6
ttbarej.m
CMS_2021_I1901295 13000 18 0 18
pT ratio
W to b
ATLAS_2020_I1801434 13000 4.7 -0.20 4.5
pT ratio
W to top
ATLAS_2020_I1801434 13000 4.2 +0.30 4.5
Cross sections
ATLAS_2022_I2037744 13000 12 +8.0 20
ATLAS_2022_I2077575 13000 7.4 -3.6 3.8
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.