Generator / tune

Details for Pythia 6.426 p0 vs. 6.427

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (6.426) Δ χ2+5% (6.427)
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 - 2.7
B jet
 η
 CMS_2018_I1703993 13000 50 0 50
B jet
 pT
 CMS_2018_I1703993 13000 58 0 58
bjbj.m
 CMS_2018_I1703993 13000 73 -4.0 69
bjbj.pt
 CMS_2018_I1703993 13000 61 +1.0 62
bjt.dphi
 ATLAS_2022_I2037744 13000 0.76 +2.5 3.3
ej.pt
 ATLAS_2022_I2037744 13000 2.5 +0.40 2.9
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.2 +0.30 3.5
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.6 -0.20 3.4
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.3 -0.50 2.8
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.8 -0.50 2.3
ejej.dphi
 ATLAS_2022_I2037744 13000 0.66 +0.28 0.94
ejets.ht
 CMS_2021_I1901295 13000 17 +3.0 20
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.7 -0.20 3.5
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.4 -0.40 3.0
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.17 -0.092 0.078
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.12 -0.089 0.031
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.35 +1.1 1.4
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 1.6 -0.10 1.5
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.21 +0.010 0.22
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.7 -0.100 1.6
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.0 0 1.0
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.9 -0.20 1.7
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.7 -0.20 2.5
Lepton η
 ATLAS_2019_I1759875 13000 42 -6.0 36
CMS_2018_I1703993 13000 32 -1.0 31
Lepton pT
 ATLAS_2019_I1759875 13000 57 -8.0 49
CMS_2018_I1703993 13000 57 0 57
CMS_2021_I1901295 13000 14 +2.0 16
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 2.3 -0.100 2.2
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.29 0 0.29
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 3.7 -0.50 3.2
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 49 -8.0 41
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 42 +1.0 43
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 34* -8.0 26
CMS_2018_I1703993 13000 54 -4.0 50
Dilepton
 HT
 ATLAS_2019_I1759875 13000 46 -5.0 41
Dilepton
 m
 ATLAS_2019_I1759875 13000 43 -1.0 42
CMS_2018_I1703993 13000 53 -2.0 51
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 47 -7.0 40
CMS_2018_I1703993 13000 50 -3.0 47
Dilepton
 y
 ATLAS_2019_I1759875 13000 35 -3.0 32*
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 4.6 +2.1 6.7
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 26
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 11 -4.9 6.1
CMS_2018_I1703993 13000 45 +2.0 47
sumpt
 ATLAS_2022_I2152933 13000 7.0 +2.5 9.5
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.8 +0.70 8.5
ATLAS_2020_I1801434 13000 7.9* -3.5 4.4*
ATLAS_2022_I2077575 13000 1.8 -0.40 1.4
Top pT
 ATLAS_2019_I1750330 13000 5.9 +1.3 7.2*
ATLAS_2020_I1801434 13000 5.2* -1.1 4.1*
ATLAS_2022_I2037744 13000 1.3 +0.50 1.8
ATLAS_2022_I2077575 13000 2.0* -0.80 1.2*
CMS_2018_I1703993 13000 82 -4.0 78
CMS_2021_I1901295 13000 24 +1.0 25*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 79 -3.0 76
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 6.1 -1.4 4.7
Top rapidity
 ATLAS_2019_I1750330 13000 7.9 +0.70 8.6
ATLAS_2020_I1801434 13000 5.1 -0.100 5.0
ATLAS_2022_I2037744 13000 1.4 +0.60 2.0
ATLAS_2022_I2077575 13000 2.3* -1.00 1.3
CMS_2018_I1703993 13000 76 -5.0 71
CMS_2021_I1901295 13000 24 +2.0 26
topej.dphi
 ATLAS_2022_I2037744 13000 2.4 +0.20 2.6
topej.m
 ATLAS_2022_I2037744 13000 0.96 +0.94 1.9
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.5 +0.40 8.9
ATLAS_2020_I1801434 13000 5.4 -0.60 4.8
ATLAS_2022_I2077575 13000 3.3* -1.4 1.9*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.7 +0.100 7.8
ATLAS_2020_I1801434 13000 9.8 -4.9 4.9
ATLAS_2022_I2037744 13000 1.8 +0.90 2.7
ATLAS_2022_I2077575 13000 2.7 -0.90 1.8
CMS_2018_I1703993 13000 120 -10 110
CMS_2021_I1901295 13000 33 +6.0 39
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 86 -9.0 77
CMS_2021_I1901295 13000 24 +3.0 27
ttbar HT
 ATLAS_2019_I1750330 13000 6.4 +0.40 6.8
ATLAS_2020_I1801434 13000 4.9 -0.90 4.0
ATLAS_2022_I2037744 13000 1.9 -0.30 1.6
ATLAS_2022_I2077575 13000 2.2 -0.70 1.5
CMS_2021_I1901295 13000 24 +2.0 26
m(ttbar)
 ATLAS_2019_I1750330 13000 5.3* +1.9 7.2*
ATLAS_2020_I1801434 13000 5.3 -1.4 3.9
ATLAS_2022_I2037744 13000 1.6 +1.0 2.6
ATLAS_2022_I2077575 13000 2.0* -0.90 1.1*
CMS_2018_I1703993 13000 91 -2.0 89
CMS_2021_I1901295 13000 29 +2.0 31
Pcrossttbar
 ATLAS_2020_I1801434 13000 6.1 -2.1 4.0
ttbar pT
 ATLAS_2019_I1750330 13000 7.3 +0.60 7.9
ATLAS_2020_I1801434 13000 5.8 -2.1 3.7*
ATLAS_2022_I2037744 13000 0.57 +1.2 1.8
ATLAS_2022_I2077575 13000 2.1* -0.60 1.5*
CMS_2018_I1703993 13000 74 -9.0 65
CMS_2021_I1901295 13000 20 +4.0 24
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.8 -2.7 3.1
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.7 -1.1 1.6
CMS_2021_I1901295 13000 32 +2.0 34
Ttbar rapidity
 ATLAS_2019_I1750330 13000 7.3 +0.60 7.9
ATLAS_2020_I1801434 13000 4.1 -1.00 3.1
ATLAS_2022_I2037744 13000 0.90 +1.00 1.9
ATLAS_2022_I2077575 13000 2.5 -0.20 2.3*
CMS_2018_I1703993 13000 71 -3.0 68
CMS_2021_I1901295 13000 28 +3.0 31
Mean rapidity
 ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 4.4 -0.80 3.6
ATLAS_2022_I2077575 13000 2.3 -0.20 2.1*
ttbarej.ht
 ATLAS_2022_I2037744 13000 0.75 +1.1 1.8
ttbarej.m
 CMS_2021_I1901295 13000 23 +3.0 26
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.6 +0.10 5.7
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.6 -1.2 4.4
Cross sections
 ATLAS_2022_I2037744 13000 2.6 +9.4 12
ATLAS_2022_I2077575 13000 11 -6.8 4.2
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.