Generator / tune

Details for Pythia 6.427 350 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 0.31 +0.64 0.95
B jet
 η
 CMS_2018_I1703993 13000 45 +3.0 48
B jet
 pT
 CMS_2018_I1703993 13000 53 +4.0 57
bjbj.m
 CMS_2018_I1703993 13000 62 +8.0 70
bjbj.pt
 CMS_2018_I1703993 13000 55 +6.0 61
bjt.dphi
 ATLAS_2022_I2037744 13000 1.4 +0.90 2.3
ej.pt
 ATLAS_2022_I2037744 13000 2.6 +0.10 2.7
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 2.4 +0.80 3.2
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.7 -0.30 3.4
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.0 -0.40 3.6
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.4 +0.20 2.6
ejej.dphi
 ATLAS_2022_I2037744 13000 1.5 -0.40 1.1
ejets.ht
 CMS_2021_I1901295 13000 15 -3.0 12
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.6 +0.10 3.7
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.7 +0.70 3.4
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.40 -0.020 0.38
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.11 +0.070 0.18
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.82 +0.58 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 2.6 0 2.6
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.43 -0.020 0.41
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.5 0 1.5
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.79 +0.31 1.1
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.4 +0.30 1.7
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.3 +0.20 2.5
Lepton η
 ATLAS_2019_I1759875 13000 34 +2.0 36
CMS_2018_I1703993 13000 28 +2.0 30
Lepton pT
 ATLAS_2019_I1759875 13000 47 +2.0 49
CMS_2018_I1703993 13000 50 +6.0 56
CMS_2021_I1901295 13000 13 0 13
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.0 +0.20 6.2
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.1 +0.100 1.2
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.9 0 7.9
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 39 +3.0 42
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 40 0 40
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 23 +4.0 27
CMS_2018_I1703993 13000 50 +3.0 53
Dilepton
 HT
 ATLAS_2019_I1759875 13000 38 +2.0 40
Dilepton
 m
 ATLAS_2019_I1759875 13000 35 +4.0 39
CMS_2018_I1703993 13000 44 +6.0 50
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 39 +1.0 40
CMS_2018_I1703993 13000 42 +6.0 48
Dilepton
 y
 ATLAS_2019_I1759875 13000 27 +2.0 29
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 0.82 +1.7 2.5
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 21 -2.0 19
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.4 +0.50 6.9
CMS_2018_I1703993 13000 43 +3.0 46
sumpt
 ATLAS_2022_I2152933 13000 2.7 -0.10 2.6
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 5.8* -1.0 4.8*
ATLAS_2022_I2077575 13000 1.4 +0.20 1.6
Top pT
 ATLAS_2019_I1750330 13000 6.3* +0.10 6.4*
ATLAS_2020_I1801434 13000 4.6 +0.10 4.7
ATLAS_2022_I2037744 13000 0.99 +1.0 2.0
ATLAS_2022_I2077575 13000 1.3* +0.100 1.4*
CMS_2018_I1703993 13000 76 +4.0 80
CMS_2021_I1901295 13000 22* -1.0 21
top.pt.ttbarRF
 CMS_2018_I1703993 13000 73 +5.0 78
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 4.9 +1.0 5.9
Top rapidity
 ATLAS_2019_I1750330 13000 7.7 -0.10 7.6
ATLAS_2020_I1801434 13000 4.5 +0.80 5.3
ATLAS_2022_I2037744 13000 1.2 +0.50 1.7
ATLAS_2022_I2077575 13000 1.9 +0.10 2.0*
CMS_2018_I1703993 13000 69 +2.0 71
CMS_2021_I1901295 13000 25* -2.0 23*
topej.dphi
 ATLAS_2022_I2037744 13000 2.5 +0.40 2.9
topej.m
 ATLAS_2022_I2037744 13000 0.61 +0.69 1.3
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.8 -0.30 8.5
ATLAS_2020_I1801434 13000 4.3 +0.60 4.9
ATLAS_2022_I2077575 13000 2.5* -0.50 2.0*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.4 -0.40 7.0
ATLAS_2020_I1801434 13000 5.7 +0.60 6.3
ATLAS_2022_I2037744 13000 3.5 -1.7 1.8
ATLAS_2022_I2077575 13000 1.6 +1.7 3.3
CMS_2018_I1703993 13000 100 +10 110
CMS_2021_I1901295 13000 32 -3.0 29
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 76 +3.0 79
CMS_2021_I1901295 13000 23 -2.0 21
ttbar HT
 ATLAS_2019_I1750330 13000 6.4 -0.50 5.9
ATLAS_2020_I1801434 13000 4.3 +0.40 4.7
ATLAS_2022_I2037744 13000 1.5 +0.10 1.6
ATLAS_2022_I2077575 13000 1.4 +0.80 2.2*
CMS_2021_I1901295 13000 23 -3.0 20
m(ttbar)
 ATLAS_2019_I1750330 13000 5.1 +0.90 6.0*
ATLAS_2020_I1801434 13000 5.0 +1.2 6.2
ATLAS_2022_I2037744 13000 n/a - 1.6
ATLAS_2022_I2077575 13000 1.5* +0.20 1.7*
CMS_2018_I1703993 13000 78 +8.0 86
CMS_2021_I1901295 13000 28 -2.0 26
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.3 +1.0 5.3
ttbar pT
 ATLAS_2019_I1750330 13000 7.0 -0.100 6.9
ATLAS_2020_I1801434 13000 4.7 +0.100 4.8
ATLAS_2022_I2037744 13000 1.4 +0.40 1.8
ATLAS_2022_I2077575 13000 1.4* +0.10 1.5*
CMS_2018_I1703993 13000 72 -3.0 69
CMS_2021_I1901295 13000 18 0 18
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 3.9 +1.1 5.0
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.5 -0.50 2.0
CMS_2021_I1901295 13000 30 -1.0 29
Ttbar rapidity
 ATLAS_2019_I1750330 13000 7.0 +0.100 7.1
ATLAS_2020_I1801434 13000 3.7 +0.20 3.9
ATLAS_2022_I2037744 13000 0.89 +0.41 1.3
ATLAS_2022_I2077575 13000 2.2 +0.90 3.1*
CMS_2018_I1703993 13000 64 +1.0 65
CMS_2021_I1901295 13000 27 -2.0 25
Mean rapidity
 ATLAS_2019_I1750330 13000 10 -0.30 9.7
ATLAS_2020_I1801434 13000 4.1 0 4.1
ATLAS_2022_I2077575 13000 1.6 +0.70 2.3*
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.1 -0.70 1.4
ttbarej.m
 CMS_2021_I1901295 13000 21 -1.0 20
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.1 +0.90 6.0
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.7 +0.90 5.6
Cross sections
 ATLAS_2022_I2037744 13000 3.2 +2.9 6.1
ATLAS_2022_I2077575 13000 7.4 -0.20 7.2
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.