Generator / tune

Details for Pythia 6.427 377 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 1.3 -0.30 1.0
B jet
 η
 CMS_2018_I1703993 13000 45 -2.0 43
B jet
 pT
 CMS_2018_I1703993 13000 53 -1.0 52
bjbj.m
 CMS_2018_I1703993 13000 62 -2.0 60
bjbj.pt
 CMS_2018_I1703993 13000 54 +2.0 56
bjt.dphi
 ATLAS_2022_I2037744 13000 2.8 - n/a
ej.pt
 ATLAS_2022_I2037744 13000 2.2* +0.90 3.1*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 5.2 -2.5 2.7
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.1 -0.90 3.2
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.2 -1.2 3.0
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.6 -1.7 1.9
ejej.dphi
 ATLAS_2022_I2037744 13000 4.6 -3.8 0.78
ejets.ht
 CMS_2021_I1901295 13000 15 -2.0 13
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.5 -0.90 3.6
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 4.2 -1.8 2.4
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.24 +0.12 0.36
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.14 -0.010 0.13
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.58 +1.8 2.4
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 3.8 -0.100 3.7
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.82 -0.020 0.80
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.6 -0.30 1.3
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.0 -0.17 0.83
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.0 -0.70 1.3
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.7 -0.40 2.3
Lepton η
 ATLAS_2019_I1759875 13000 33 -3.0 30
CMS_2018_I1703993 13000 28 -2.0 26
Lepton pT
 ATLAS_2019_I1759875 13000 45 -4.0 41
CMS_2018_I1703993 13000 49 -1.0 48
CMS_2021_I1901295 13000 13 +1.0 14
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.0 +0.30 6.3
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.0 +0.10 1.1
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.9 -0.30 7.6
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 37 -4.0 33
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 37 -1.0 36
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 27* -6.0 21
CMS_2018_I1703993 13000 45 -4.0 41
Dilepton
 HT
 ATLAS_2019_I1759875 13000 36 -2.0 34
Dilepton
 m
 ATLAS_2019_I1759875 13000 35 -4.0 31
CMS_2018_I1703993 13000 43 -2.0 41
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 36 -2.0 34
CMS_2018_I1703993 13000 43 -3.0 40
Dilepton
 y
 ATLAS_2019_I1759875 13000 30* -6.0 24
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 1.8 +0.70 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 18 -1.0 17
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 11 -4.0 7.0
CMS_2018_I1703993 13000 40 0 40
sumpt
 ATLAS_2022_I2152933 13000 1.9 -0.100 1.8
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 6.8 +0.30 7.1
ATLAS_2020_I1801434 13000 6.9 -2.1 4.8*
ATLAS_2022_I2077575 13000 1.6* -1.0 0.60*
Top pT
 ATLAS_2019_I1750330 13000 6.2* +0.70 6.9*
ATLAS_2020_I1801434 13000 5.7* -1.2 4.5
ATLAS_2022_I2037744 13000 3.6 -0.50 3.1
ATLAS_2022_I2077575 13000 1.5* -0.10 1.4*
CMS_2018_I1703993 13000 66 -1.0 65
CMS_2021_I1901295 13000 20* +1.0 21*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 64 0 64
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 6.5 -0.50 6.0
Top rapidity
 ATLAS_2019_I1750330 13000 7.2 +0.30 7.5
ATLAS_2020_I1801434 13000 5.8 -0.60 5.2
ATLAS_2022_I2037744 13000 2.7* +0.80 3.5*
ATLAS_2022_I2077575 13000 1.6* +0.20 1.8*
CMS_2018_I1703993 13000 62 0 62
CMS_2021_I1901295 13000 21 -1.0 20
topej.dphi
 ATLAS_2022_I2037744 13000 2.6 +0.70 3.3
topej.m
 ATLAS_2022_I2037744 13000 1.2 +0.90 2.1
χ(ttbar)
 ATLAS_2019_I1750330 13000 7.7 +0.90 8.6
ATLAS_2020_I1801434 13000 6.1 -0.70 5.4
ATLAS_2022_I2077575 13000 1.9* -0.100 1.8*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 6.4 +0.70 7.1
ATLAS_2020_I1801434 13000 9.7 -3.8 5.9
ATLAS_2022_I2037744 13000 n/a - 6.5
ATLAS_2022_I2077575 13000 1.9 -0.80 1.1*
CMS_2018_I1703993 13000 91 -2.0 89
CMS_2021_I1901295 13000 29 -2.0 27
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 66 +4.0 70
CMS_2021_I1901295 13000 21 +2.0 23
ttbar HT
 ATLAS_2019_I1750330 13000 5.5 +0.70 6.2
ATLAS_2020_I1801434 13000 6.3 -1.7 4.6
ATLAS_2022_I2037744 13000 2.2 +0.30 2.5
ATLAS_2022_I2077575 13000 2.6* -1.2 1.4
CMS_2021_I1901295 13000 n/a - n/a
m(ttbar)
 ATLAS_2019_I1750330 13000 5.3 +1.6 6.9*
ATLAS_2020_I1801434 13000 5.2 -0.10 5.1
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 1.7* -0.40 1.3*
CMS_2018_I1703993 13000 79 -5.0 74
CMS_2021_I1901295 13000 27* +2.0 29*
Pcrossttbar
 ATLAS_2020_I1801434 13000 6.6 -1.3 5.3
ttbar pT
 ATLAS_2019_I1750330 13000 6.4 +0.80 7.2*
ATLAS_2020_I1801434 13000 5.9 -1.7 4.2
ATLAS_2022_I2037744 13000 3.2 +3.2 6.4
ATLAS_2022_I2077575 13000 1.7* -0.50 1.2*
CMS_2018_I1703993 13000 60 +4.0 64
CMS_2021_I1901295 13000 18 -1.0 17
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.7 -1.4 4.3
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.2* -1.0 1.2*
CMS_2021_I1901295 13000 27 +1.0 28
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.4 +0.40 6.8
ATLAS_2020_I1801434 13000 4.0 +0.80 4.8
ATLAS_2022_I2037744 13000 2.2 +1.0 3.2
ATLAS_2022_I2077575 13000 2.4 0 2.4
CMS_2018_I1703993 13000 55 0 55
CMS_2021_I1901295 13000 25 +1.0 26
Mean rapidity
 ATLAS_2019_I1750330 13000 9.1 -0.100 9.0
ATLAS_2020_I1801434 13000 5.1 -1.3 3.8
ATLAS_2022_I2077575 13000 2.9 -0.70 2.2
ttbarej.ht
 ATLAS_2022_I2037744 13000 1.7 +1.9 3.6
ttbarej.m
 CMS_2021_I1901295 13000 20 +1.0 21
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 6.0 -1.3 4.7
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 6.1 -0.100 6.0
Cross sections
 ATLAS_2022_I2037744 13000 12 +11 23
ATLAS_2022_I2077575 13000 8.2 -2.4 5.8
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.