Generator / tune

Details for Pythia 6.427 z2 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 1.0 -0.95 0.055
B jet
 η
 CMS_2018_I1703993 13000 44 +5.0 49
B jet
 pT
 CMS_2018_I1703993 13000 53 +4.0 57
bjbj.m
 CMS_2018_I1703993 13000 62 +7.0 69
bjbj.pt
 CMS_2018_I1703993 13000 56 +9.0 65
bjt.dphi
 ATLAS_2022_I2037744 13000 1.6 -0.50 1.1
ej.pt
 ATLAS_2022_I2037744 13000 2.8 +0.70 3.5
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.7 -0.20 3.5
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.3 -0.100 4.2
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.3 -0.20 4.1
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.3 -0.60 2.7
ejej.dphi
 ATLAS_2022_I2037744 13000 0.79 +0.030 0.82
ejets.ht
 CMS_2021_I1901295 13000 11 0 11
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.6 -0.60 4.0
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 4.0* -0.90 3.1
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 1.0 -0.070 0.93
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.83 -0.25 0.58
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.55 +0.95 1.5
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 4.3 -0.50 3.8
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.96 -0.13 0.83
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.4 -0.20 2.2
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.9 -0.100 1.8
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.4 0 2.4
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.4 +0.40 3.8
Lepton η
 ATLAS_2019_I1759875 13000 32 +1.0 33
CMS_2018_I1703993 13000 27 +3.0 30
Lepton pT
 ATLAS_2019_I1759875 13000 42 +2.0 44
CMS_2018_I1703993 13000 50 +5.0 55
CMS_2021_I1901295 13000 13 0 13
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 5.5 -0.100 5.4
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.1 0 1.1
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.2 -0.30 6.9
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 36 +1.0 37
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 37 +6.0 43
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 21 0 21
CMS_2018_I1703993 13000 42 +3.0 45
Dilepton
 HT
 ATLAS_2019_I1759875 13000 35 +1.0 36
Dilepton
 m
 ATLAS_2019_I1759875 13000 34 +1.0 35
CMS_2018_I1703993 13000 45 +5.0 50
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 34 +2.0 36
CMS_2018_I1703993 13000 42 +4.0 46
Dilepton
 y
 ATLAS_2019_I1759875 13000 25 +1.0 26
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 1.5 0 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 +1.0 20
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 8.0 -2.9 5.1
CMS_2018_I1703993 13000 43 +3.0 46
sumpt
 ATLAS_2022_I2152933 13000 6.4 -2.6 3.8
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.6 +0.70 8.3
ATLAS_2020_I1801434 13000 5.1* -1.5 3.6
ATLAS_2022_I2077575 13000 1.6 -0.20 1.4
Top pT
 ATLAS_2019_I1750330 13000 5.5* +0.50 6.0*
ATLAS_2020_I1801434 13000 5.2 -1.7 3.5
ATLAS_2022_I2037744 13000 1.3 -0.40 0.90
ATLAS_2022_I2077575 13000 1.2* +0.20 1.4*
CMS_2018_I1703993 13000 72 0 72
CMS_2021_I1901295 13000 20* +2.0 22*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 66 +1.0 67
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 6.0 -1.5 4.5
Top rapidity
 ATLAS_2019_I1750330 13000 6.8 +1.0 7.8
ATLAS_2020_I1801434 13000 6.8 -2.6 4.2
ATLAS_2022_I2037744 13000 1.0* +1.2 2.2*
ATLAS_2022_I2077575 13000 1.5* 0 1.5*
CMS_2018_I1703993 13000 64 +2.0 66
CMS_2021_I1901295 13000 21 +3.0 24*
topej.dphi
 ATLAS_2022_I2037744 13000 2.8 0 2.8
topej.m
 ATLAS_2022_I2037744 13000 0.73 +0.67 1.4
χ(ttbar)
 ATLAS_2019_I1750330 13000 7.6 +0.90 8.5
ATLAS_2020_I1801434 13000 6.9 -3.0 3.9
ATLAS_2022_I2077575 13000 1.8 +0.100 1.9*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 6.2 +0.50 6.7
ATLAS_2020_I1801434 13000 7.0 -2.8 4.2
ATLAS_2022_I2037744 13000 2.0 +1.9 3.9
ATLAS_2022_I2077575 13000 1.8 +0.100 1.9
CMS_2018_I1703993 13000 92 +1.0 93
CMS_2021_I1901295 13000 26 +2.0 28
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 73 +1.0 74
CMS_2021_I1901295 13000 22 +3.0 25
ttbar HT
 ATLAS_2019_I1750330 13000 5.8 +0.50 6.3
ATLAS_2020_I1801434 13000 4.7 -1.4 3.3
ATLAS_2022_I2037744 13000 0.74 +0.030 0.77
ATLAS_2022_I2077575 13000 1.5 +0.30 1.8*
CMS_2021_I1901295 13000 n/a - 23
m(ttbar)
 ATLAS_2019_I1750330 13000 4.9 0 4.9*
ATLAS_2020_I1801434 13000 6.1 -1.9 4.2
ATLAS_2022_I2037744 13000 1.2 -0.40 0.80
ATLAS_2022_I2077575 13000 1.4* -0.100 1.3*
CMS_2018_I1703993 13000 72 +3.0 75
CMS_2021_I1901295 13000 28* +3.0 31
Pcrossttbar
 ATLAS_2020_I1801434 13000 6.5 -1.9 4.6
ttbar pT
 ATLAS_2019_I1750330 13000 6.9 +0.70 7.6
ATLAS_2020_I1801434 13000 4.7* -0.90 3.8
ATLAS_2022_I2037744 13000 2.0 +1.4 3.4
ATLAS_2022_I2077575 13000 1.4* +0.10 1.5*
CMS_2018_I1703993 13000 65 0 65
CMS_2021_I1901295 13000 15 +1.0 16
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.3 -1.7 3.6
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 1.3 +1.00 2.3
CMS_2021_I1901295 13000 29 +4.0 33
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.4 +0.60 7.0
ATLAS_2020_I1801434 13000 3.6* -0.10 3.5
ATLAS_2022_I2037744 13000 0.48 +1.0 1.5
ATLAS_2022_I2077575 13000 2.2 -0.40 1.8*
CMS_2018_I1703993 13000 58 +2.0 60
CMS_2021_I1901295 13000 25 +4.0 29
Mean rapidity
 ATLAS_2019_I1750330 13000 9.7 +0.30 10
ATLAS_2020_I1801434 13000 4.9 -1.0 3.9
ATLAS_2022_I2077575 13000 2.0 -0.20 1.8*
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.5 +1.2 3.7
ttbarej.m
 CMS_2021_I1901295 13000 18 +1.0 19
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.3 -1.5 3.8
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.5 -1.4 4.1
Cross sections
 ATLAS_2022_I2037744 13000 1.1 0 1.1
ATLAS_2022_I2077575 13000 5.3 +1.6 6.9
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.