Generator / tune

Details for Pythia 6.427 dw 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 1.1 -0.22 0.88
B jet
 η
 CMS_2018_I1703993 13000 140 +10 150
B jet
 pT
 CMS_2018_I1703993 13000 180 0 180
bjbj.m
 CMS_2018_I1703993 13000 210 +10 220
bjbj.pt
 CMS_2018_I1703993 13000 180 +20 200
bjt.dphi
 ATLAS_2022_I2037744 13000 1.3 -0.30 1.0
ej.pt
 ATLAS_2022_I2037744 13000 3.8 -0.40 3.4
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 6.8 -1.5 5.3
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 7.2 -1.4 5.8
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 6.4 -0.90 5.5
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 4.9 -0.70 4.2
ejej.dphi
 ATLAS_2022_I2037744 13000 0.75 +0.65 1.4
ejets.ht
 CMS_2021_I1901295 13000 25 -2.0 23
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 6.0 +0.70 6.7
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 5.5 -0.40 5.1
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.049 -0.0010 0.048
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.080 -0.044 0.036
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 n/a - 2.2
Jet pT
 ATLAS_2014_I1304688 7000 27 0 27
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 1.4 -0.100 1.3
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.29 -0.0100 0.28
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.5 -0.20 1.3
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.73 +0.14 0.87
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.4 +0.10 1.5
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 1.6 +0.20 1.8
Lepton η
 ATLAS_2019_I1759875 13000 40 0 40
CMS_2018_I1703993 13000 81 +6.0 87
Lepton pT
 ATLAS_2019_I1759875 13000 54 0 54
CMS_2018_I1703993 13000 170 +10 180
CMS_2021_I1901295 13000 17 0 17
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.8 -0.40 6.4
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.55 +0.100 0.65
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.0 +0.50 7.5
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 46 -1.0 45
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 120 0 120
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 29 +1.0 30*
CMS_2018_I1703993 13000 130 0 130
Dilepton
 HT
 ATLAS_2019_I1759875 13000 46 -1.0 45
Dilepton
 m
 ATLAS_2019_I1759875 13000 46 -3.0 43
CMS_2018_I1703993 13000 140 +10 150
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 47 -3.0 44
CMS_2018_I1703993 13000 140 +10 150
Dilepton
 y
 ATLAS_2019_I1759875 13000 37* -5.0 32
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 10 +6.0 16
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 31 +3.0 34
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.5 +1.0 8.5
CMS_2018_I1703993 13000 140 +10 150
sumpt
 ATLAS_2022_I2152933 13000 19 +13 32
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 8.2 -0.20 8.0
ATLAS_2020_I1801434 13000 5.2 +0.50 5.7*
ATLAS_2022_I2077575 13000 2.4 -0.30 2.1*
Top pT
 ATLAS_2019_I1750330 13000 7.0* -0.80 6.2
ATLAS_2020_I1801434 13000 5.1 +0.60 5.7
ATLAS_2022_I2037744 13000 2.2 -1.7 0.53
ATLAS_2022_I2077575 13000 1.5* +0.30 1.8*
CMS_2018_I1703993 13000 170 +10 180
CMS_2021_I1901295 13000 32* -1.0 31
top.pt.ttbarRF
 CMS_2018_I1703993 13000 180 +10 190
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 8.3 -0.40 7.9
Top rapidity
 ATLAS_2019_I1750330 13000 7.7 0 7.7
ATLAS_2020_I1801434 13000 6.4 +1.6 8.0
ATLAS_2022_I2037744 13000 1.2 +0.20 1.4*
ATLAS_2022_I2077575 13000 1.7* -0.20 1.5*
CMS_2018_I1703993 13000 150 +10 160
CMS_2021_I1901295 13000 31 0 31
topej.dphi
 ATLAS_2022_I2037744 13000 3.3 -0.30 3.0
topej.m
 ATLAS_2022_I2037744 13000 3.5 -3.0 0.55
χ(ttbar)
 ATLAS_2019_I1750330 13000 9.5 0 9.5
ATLAS_2020_I1801434 13000 6.6 +1.8 8.4
ATLAS_2022_I2077575 13000 3.1* -0.60 2.5*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.8 -0.40 7.4
ATLAS_2020_I1801434 13000 5.5 +1.7 7.2
ATLAS_2022_I2037744 13000 4.6 -3.2 1.4
ATLAS_2022_I2077575 13000 2.9 -0.70 2.2
CMS_2018_I1703993 13000 260 0 260
CMS_2021_I1901295 13000 41 0 41
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 160 +10 170
CMS_2021_I1901295 13000 34 -1.0 33
ttbar HT
 ATLAS_2019_I1750330 13000 6.9 -0.30 6.6
ATLAS_2020_I1801434 13000 5.6 +0.40 6.0
ATLAS_2022_I2037744 13000 0.71 -0.31 0.40
ATLAS_2022_I2077575 13000 1.8 +0.40 2.2*
CMS_2021_I1901295 13000 29 0 29
m(ttbar)
 ATLAS_2019_I1750330 13000 5.2* -0.40 4.8*
ATLAS_2020_I1801434 13000 5.9 +0.90 6.8
ATLAS_2022_I2037744 13000 0.76 -0.21 0.55
ATLAS_2022_I2077575 13000 1.4* +0.20 1.6*
CMS_2018_I1703993 13000 170 +30 200*
CMS_2021_I1901295 13000 43 -1.0 42
Pcrossttbar
 ATLAS_2020_I1801434 13000 6.1 +0.70 6.8
ttbar pT
 ATLAS_2019_I1750330 13000 8.2 -0.70 7.5
ATLAS_2020_I1801434 13000 5.3 +0.50 5.8
ATLAS_2022_I2037744 13000 3.4 -2.4 1.0
ATLAS_2022_I2077575 13000 2.2 -0.10 2.1*
CMS_2018_I1703993 13000 170 +10 180
CMS_2021_I1901295 13000 25 -2.0 23
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 6.5 0 6.5
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.8 -1.2 1.6
CMS_2021_I1901295 13000 45 -1.0 44
Ttbar rapidity
 ATLAS_2019_I1750330 13000 7.2 -0.20 7.0
ATLAS_2020_I1801434 13000 4.3 +0.20 4.5*
ATLAS_2022_I2037744 13000 0.51 +0.28 0.79
ATLAS_2022_I2077575 13000 1.6 +0.100 1.7
CMS_2018_I1703993 13000 140 0 140
CMS_2021_I1901295 13000 41 -2.0 39
Mean rapidity
 ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 5.5 +0.20 5.7
ATLAS_2022_I2077575 13000 1.7 +0.50 2.2
ttbarej.ht
 ATLAS_2022_I2037744 13000 5.0 -2.4 2.6
ttbarej.m
 CMS_2021_I1901295 13000 31 -1.0 30
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.7 +1.5 7.2
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 6.4 +0.70 7.1
Cross sections
 ATLAS_2022_I2037744 13000 0.82 -0.82 0.0012
ATLAS_2022_I2077575 13000 8.4 -2.0 6.4
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.