Generator / tune

Details for Pythia 6.427 365 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 1.9 -0.70 1.2
B jet
 η
 CMS_2018_I1703993 13000 58 -2.0 56
B jet
 pT
 CMS_2018_I1703993 13000 70 -4.0 66
bjbj.m
 CMS_2018_I1703993 13000 87 -3.0 84
bjbj.pt
 CMS_2018_I1703993 13000 73 -3.0 70
bjt.dphi
 ATLAS_2022_I2037744 13000 2.5 +0.50 3.0
ej.pt
 ATLAS_2022_I2037744 13000 2.9* -0.30 2.6*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 4.1 -0.70 3.4
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.3 +0.80 5.1
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.7 -0.70 4.0
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.1 -0.10 3.0
ejej.dphi
 ATLAS_2022_I2037744 13000 4.2 -2.3 1.9
ejets.ht
 CMS_2021_I1901295 13000 18 -3.0 15
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 5.2 +0.40 5.6
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.8 -0.40 3.4
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.38 -0.020 0.36
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.13 -0.033 0.097
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.48 +0.49 0.97
Jet pT
 ATLAS_2014_I1304688 7000 18 0 18
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 1.5 +0.10 1.6
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.21 +0.010 0.22
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.1 -0.40 1.7
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.4 -0.41 0.99
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.2 -0.80 1.4
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.3 -1.2 2.1
Lepton η
 ATLAS_2019_I1759875 13000 39 -1.0 38
CMS_2018_I1703993 13000 37 -2.0 35
Lepton pT
 ATLAS_2019_I1759875 13000 54 -2.0 52
CMS_2018_I1703993 13000 69 -5.0 64
CMS_2021_I1901295 13000 15 -1.0 14
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 2.2 +0.60 2.8
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.17 +0.030 0.20
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 3.2 +0.30 3.5
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 44 0 44
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 50 -4.0 46
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 33* -4.0 29
CMS_2018_I1703993 13000 58 +1.0 59
Dilepton
 HT
 ATLAS_2019_I1759875 13000 44 -1.0 43
Dilepton
 m
 ATLAS_2019_I1759875 13000 41 +1.0 42
CMS_2018_I1703993 13000 59 -1.0 58
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 45 -1.0 44
CMS_2018_I1703993 13000 58 -5.0 53
Dilepton
 y
 ATLAS_2019_I1759875 13000 32 -1.0 31
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 7.3 +14 21
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 24 -2.0 22
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 9.1 -1.7 7.4
CMS_2018_I1703993 13000 54 -5.0 49
sumpt
 ATLAS_2022_I2152933 13000 6.9 +19 26
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 8.4 -0.40 8.0
ATLAS_2020_I1801434 13000 6.2 -1.2 5.0
ATLAS_2022_I2077575 13000 2.2 -0.60 1.6*
Top pT
 ATLAS_2019_I1750330 13000 6.9* -0.20 6.7*
ATLAS_2020_I1801434 13000 5.1 0 5.1
ATLAS_2022_I2037744 13000 3.4 -0.90 2.5
ATLAS_2022_I2077575 13000 1.6* -0.30 1.3*
CMS_2018_I1703993 13000 85 0 85
CMS_2021_I1901295 13000 25 -1.0 24
top.pt.ttbarRF
 CMS_2018_I1703993 13000 82 +4.0 86
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 6.3 +0.40 6.7
Top rapidity
 ATLAS_2019_I1750330 13000 8.4 -0.50 7.9
ATLAS_2020_I1801434 13000 6.5 -0.50 6.0
ATLAS_2022_I2037744 13000 2.5 +0.60 3.1
ATLAS_2022_I2077575 13000 2.1* -0.40 1.7*
CMS_2018_I1703993 13000 79 +1.0 80
CMS_2021_I1901295 13000 25 -1.0 24
topej.dphi
 ATLAS_2022_I2037744 13000 2.7 -0.10 2.6
topej.m
 ATLAS_2022_I2037744 13000 1.3 +0.100 1.4
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.8 +0.20 9.0
ATLAS_2020_I1801434 13000 6.7 -1.0 5.7
ATLAS_2022_I2077575 13000 2.4 +0.10 2.5
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.4 +0.20 7.6
ATLAS_2020_I1801434 13000 8.2 -1.6 6.6
ATLAS_2022_I2037744 13000 2.8 +0.60 3.4
ATLAS_2022_I2077575 13000 2.2 -0.10 2.1
CMS_2018_I1703993 13000 120 0 120
CMS_2021_I1901295 13000 36 -3.0 33
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 86 0 86
CMS_2021_I1901295 13000 27 -1.0 26
ttbar HT
 ATLAS_2019_I1750330 13000 6.8 -0.20 6.6
ATLAS_2020_I1801434 13000 5.6 -0.40 5.2
ATLAS_2022_I2037744 13000 2.4 - n/a
ATLAS_2022_I2077575 13000 3.1* -1.2 1.9
CMS_2021_I1901295 13000 25 - n/a
m(ttbar)
 ATLAS_2019_I1750330 13000 6.2* -0.20 6.0
ATLAS_2020_I1801434 13000 5.8 -0.30 5.5
ATLAS_2022_I2037744 13000 1.9 - n/a
ATLAS_2022_I2077575 13000 2.1* -0.70 1.4*
CMS_2018_I1703993 13000 88 +8.0 96
CMS_2021_I1901295 13000 33 -2.0 31
Pcrossttbar
 ATLAS_2020_I1801434 13000 6.4 -0.60 5.8
ttbar pT
 ATLAS_2019_I1750330 13000 7.7 -0.10 7.6
ATLAS_2020_I1801434 13000 6.5 -1.3 5.2*
ATLAS_2022_I2037744 13000 3.4 -1.2 2.2
ATLAS_2022_I2077575 13000 2.4* -1.0 1.4
CMS_2018_I1703993 13000 72 +4.0 76
CMS_2021_I1901295 13000 22 -2.0 20
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.3 +1.7 6.0
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.8 +1.4 4.2
CMS_2021_I1901295 13000 35 -2.0 33
Ttbar rapidity
 ATLAS_2019_I1750330 13000 8.4 -1.1 7.3
ATLAS_2020_I1801434 13000 4.4 -0.20 4.2*
ATLAS_2022_I2037744 13000 2.3 +0.40 2.7
ATLAS_2022_I2077575 13000 3.2* -1.3 1.9
CMS_2018_I1703993 13000 73 0 73
CMS_2021_I1901295 13000 31 -1.0 30
Mean rapidity
 ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 4.7 +0.40 5.1
ATLAS_2022_I2077575 13000 3.5* -1.5 2.0
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.7 -0.30 2.4
ttbarej.m
 CMS_2021_I1901295 13000 25 -2.0 23
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.6 -0.20 5.4
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 6.5 -1.0 5.5
Cross sections
 ATLAS_2022_I2037744 13000 13 -3.3 9.7
ATLAS_2022_I2077575 13000 9.5 -2.4 7.1
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.