Generator / tune

Details for Pythia 6.426 dw 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 0.79 +0.31 1.1
B jet
 η
 CMS_2018_I1703993 13000 160 -20 140
B jet
 pT
 CMS_2018_I1703993 13000 200 -20 180
bjbj.m
 CMS_2018_I1703993 13000 250 -40 210
bjbj.pt
 CMS_2018_I1703993 13000 220 -40 180
bjt.dphi
 ATLAS_2022_I2037744 13000 1.6 -0.30 1.3
ej.pt
 ATLAS_2022_I2037744 13000 3.6 +0.20 3.8
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 5.6 +1.2 6.8
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 5.3 +1.9 7.2
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 5.2 +1.2 6.4
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 4.8 +0.10 4.9
ejej.dphi
 ATLAS_2022_I2037744 13000 0.90 -0.15 0.75
ejets.ht
 CMS_2021_I1901295 13000 23 +2.0 25
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.4 +1.6 6.0
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 4.6 +0.90 5.5
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.092 -0.043 0.049
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.050 +0.030 0.080
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 2.3 - n/a
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 1.1 +0.30 1.4
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.22 +0.070 0.29
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.4 +0.10 1.5
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.90 -0.17 0.73
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.3 +0.100 1.4
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 1.6 0 1.6
Lepton η
 ATLAS_2019_I1759875 13000 38 +2.0 40
CMS_2018_I1703993 13000 94 -13 81
Lepton pT
 ATLAS_2019_I1759875 13000 52 +2.0 54
CMS_2018_I1703993 13000 200 -30 170
CMS_2021_I1901295 13000 17 0 17
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.6 +0.20 6.8
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.64 -0.090 0.55
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 6.8 +0.20 7.0
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 43 +3.0 46
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 140 -20 120
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 25 +4.0 29
CMS_2018_I1703993 13000 150 -20 130
Dilepton
 HT
 ATLAS_2019_I1759875 13000 43 +3.0 46
Dilepton
 m
 ATLAS_2019_I1759875 13000 38 +8.0 46
CMS_2018_I1703993 13000 160 -20 140
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 42 +5.0 47
CMS_2018_I1703993 13000 160 -20 140
Dilepton
 y
 ATLAS_2019_I1759875 13000 35* +2.0 37*
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 7.6 +2.4 10
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 41 -10 31
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.1 +0.40 7.5
CMS_2018_I1703993 13000 160 -20 140
sumpt
 ATLAS_2022_I2152933 13000 11 +8.0 19
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 8.3 -0.10 8.2
ATLAS_2020_I1801434 13000 5.5* -0.30 5.2
ATLAS_2022_I2077575 13000 2.2* +0.20 2.4
Top pT
 ATLAS_2019_I1750330 13000 6.4 +0.60 7.0*
ATLAS_2020_I1801434 13000 4.4 +0.70 5.1
ATLAS_2022_I2037744 13000 1.5 +0.70 2.2
ATLAS_2022_I2077575 13000 1.6* -0.10 1.5*
CMS_2018_I1703993 13000 180 -10 170
CMS_2021_I1901295 13000 31 +1.0 32*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 180 0 180
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 6.4 +1.9 8.3
Top rapidity
 ATLAS_2019_I1750330 13000 7.6 +0.10 7.7
ATLAS_2020_I1801434 13000 6.2 +0.20 6.4
ATLAS_2022_I2037744 13000 0.90* +0.30 1.2
ATLAS_2022_I2077575 13000 1.7* 0 1.7*
CMS_2018_I1703993 13000 160 -10 150
CMS_2021_I1901295 13000 31 0 31
topej.dphi
 ATLAS_2022_I2037744 13000 2.9 +0.40 3.3
topej.m
 ATLAS_2022_I2037744 13000 1.5 +2.0 3.5
χ(ttbar)
 ATLAS_2019_I1750330 13000 9.0 +0.50 9.5
ATLAS_2020_I1801434 13000 6.1 +0.50 6.6
ATLAS_2022_I2077575 13000 2.7 +0.40 3.1*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.4 +0.40 7.8
ATLAS_2020_I1801434 13000 5.5 0 5.5
ATLAS_2022_I2037744 13000 3.0 +1.6 4.6
ATLAS_2022_I2077575 13000 2.6 +0.30 2.9
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 170 -10 160
CMS_2021_I1901295 13000 34 0 34
ttbar HT
 ATLAS_2019_I1750330 13000 6.8 +0.10 6.9
ATLAS_2020_I1801434 13000 5.1 +0.50 5.6
ATLAS_2022_I2037744 13000 0.50 +0.21 0.71
ATLAS_2022_I2077575 13000 2.0 -0.20 1.8
CMS_2021_I1901295 13000 29 0 29
m(ttbar)
 ATLAS_2019_I1750330 13000 4.7 +0.50 5.2*
ATLAS_2020_I1801434 13000 5.1 +0.80 5.9
ATLAS_2022_I2037744 13000 0.57 +0.19 0.76
ATLAS_2022_I2077575 13000 1.7* -0.30 1.4*
CMS_2018_I1703993 13000 170 0 170
CMS_2021_I1901295 13000 43 0 43
Pcrossttbar
 ATLAS_2020_I1801434 13000 5.9 +0.20 6.1
ttbar pT
 ATLAS_2019_I1750330 13000 8.0 +0.20 8.2
ATLAS_2020_I1801434 13000 4.8 +0.50 5.3
ATLAS_2022_I2037744 13000 2.7 +0.70 3.4
ATLAS_2022_I2077575 13000 1.7* +0.50 2.2
CMS_2018_I1703993 13000 170 0 170
CMS_2021_I1901295 13000 25 0 25
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.1 +1.4 6.5
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 3.4 -0.60 2.8
CMS_2021_I1901295 13000 45 0 45
Ttbar rapidity
 ATLAS_2019_I1750330 13000 7.0 +0.20 7.2
ATLAS_2020_I1801434 13000 4.8* -0.50 4.3
ATLAS_2022_I2037744 13000 1.0 -0.49 0.51
ATLAS_2022_I2077575 13000 2.6* -1.0 1.6
CMS_2018_I1703993 13000 140 0 140
CMS_2021_I1901295 13000 41 0 41
Mean rapidity
 ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 5.2 +0.30 5.5
ATLAS_2022_I2077575 13000 2.6* -0.90 1.7
ttbarej.ht
 ATLAS_2022_I2037744 13000 3.3 +1.7 5.0
ttbarej.m
 CMS_2021_I1901295 13000 30 +1.0 31
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.8 -0.100 5.7
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.8 +0.60 6.4
Cross sections
 ATLAS_2022_I2037744 13000 0.015 +0.81 0.82
ATLAS_2022_I2077575 13000 8.7 -0.30 8.4
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.