Generator / tune

Details for Pythia 6.426 z1 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 1.3 - n/a
B jet
 η
 CMS_2018_I1703993 13000 50 +8.0 58
B jet
 pT
 CMS_2018_I1703993 13000 56 +16 72
bjbj.m
 CMS_2018_I1703993 13000 70 +19 89
bjbj.pt
 CMS_2018_I1703993 13000 61 +13 74
bjt.dphi
 ATLAS_2022_I2037744 13000 1.9 -0.70 1.2
ej.pt
 ATLAS_2022_I2037744 13000 3.6 0 3.6
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.5 -1.3 2.2
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.4 -1.1 3.3
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.0 -0.90 3.1
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.7 -0.60 2.1
ejej.dphi
 ATLAS_2022_I2037744 13000 0.96 +0.44 1.4
ejets.ht
 CMS_2021_I1901295 13000 12 +1.0 13
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.4 -0.50 3.9
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.5 -1.1 2.4
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.91 -0.14 0.77
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.64 -0.060 0.58
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.95 +0.65 1.6
Jet pT
 ATLAS_2014_I1304688 7000 16 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 5.1 -0.100 5.0
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 1.0 +0.10 1.1
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.6 -0.20 2.4
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 2.1 0 2.1
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.7 -0.40 2.3
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.6 -0.20 3.4
Lepton η
 ATLAS_2019_I1759875 13000 38 -1.0 37
CMS_2018_I1703993 13000 29 +6.0 35
Lepton pT
 ATLAS_2019_I1759875 13000 53 0 53
CMS_2018_I1703993 13000 54 +13 67
CMS_2021_I1901295 13000 13 +2.0 15
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.2 +0.100 6.3
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.2 0 1.2
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.6 +1.3 8.9
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 43 +1.0 44
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 41 +9.0 50
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 26 +4.0 30*
CMS_2018_I1703993 13000 45 +11 56
Dilepton
 HT
 ATLAS_2019_I1759875 13000 44 +1.0 45
Dilepton
 m
 ATLAS_2019_I1759875 13000 40 -1.0 39
CMS_2018_I1703993 13000 48 +10 58
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 43 +1.0 44
CMS_2018_I1703993 13000 47 +8.0 55
Dilepton
 y
 ATLAS_2019_I1759875 13000 30 +1.0 31
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 3.0 -0.60 2.4
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 22 +1.0 23
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.5 -1.2 5.3
CMS_2018_I1703993 13000 46 +8.0 54
sumpt
 ATLAS_2022_I2152933 13000 4.5 +1.8 6.3
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 8.8 -0.20 8.6
ATLAS_2020_I1801434 13000 4.3 -0.100 4.2
ATLAS_2022_I2077575 13000 2.3 -0.100 2.2
Top pT
 ATLAS_2019_I1750330 13000 6.2* -0.20 6.0
ATLAS_2020_I1801434 13000 5.0 -1.0 4.0
ATLAS_2022_I2037744 13000 1.6 -0.50 1.1
ATLAS_2022_I2077575 13000 1.8* +0.100 1.9*
CMS_2018_I1703993 13000 83 +6.0 89
CMS_2021_I1901295 13000 22* +2.0 24*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 78 +7.0 85
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.6 -1.4 4.2
Top rapidity
 ATLAS_2019_I1750330 13000 7.5 +0.30 7.8
ATLAS_2020_I1801434 13000 5.4 -1.6 3.8
ATLAS_2022_I2037744 13000 1.7 -0.79 0.91*
ATLAS_2022_I2077575 13000 1.9* +0.70 2.6*
CMS_2018_I1703993 13000 75 +2.0 77
CMS_2021_I1901295 13000 24 +2.0 26
topej.dphi
 ATLAS_2022_I2037744 13000 3.0 -0.10 2.9
topej.m
 ATLAS_2022_I2037744 13000 1.6 -0.61 0.99
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.3 +0.60 8.9
ATLAS_2020_I1801434 13000 5.7 -1.9 3.8
ATLAS_2022_I2077575 13000 2.8* +0.40 3.2*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.0 +0.100 7.1
ATLAS_2020_I1801434 13000 5.5 -0.70 4.8
ATLAS_2022_I2037744 13000 5.8 -1.7 4.1
ATLAS_2022_I2077575 13000 2.3 -0.100 2.2
CMS_2018_I1703993 13000 110 0 110
CMS_2021_I1901295 13000 29 +3.0 32
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 83 -1.0 82
CMS_2021_I1901295 13000 24 +2.0 26
ttbar HT
 ATLAS_2019_I1750330 13000 6.7 +0.40 7.1
ATLAS_2020_I1801434 13000 4.7 -1.1 3.6
ATLAS_2022_I2037744 13000 0.31 +0.18 0.49
ATLAS_2022_I2077575 13000 1.6 +1.3 2.9
CMS_2021_I1901295 13000 24 +2.0 26
m(ttbar)
 ATLAS_2019_I1750330 13000 5.3* -0.40 4.9*
ATLAS_2020_I1801434 13000 5.4 -0.80 4.6
ATLAS_2022_I2037744 13000 1.3 +0.100 1.4
ATLAS_2022_I2077575 13000 1.7* +0.20 1.9*
CMS_2018_I1703993 13000 120* -32 88
CMS_2021_I1901295 13000 28 +3.0 31*
Pcrossttbar
 ATLAS_2020_I1801434 13000 5.8 -1.7 4.1
ttbar pT
 ATLAS_2019_I1750330 13000 7.9 -0.30 7.6
ATLAS_2020_I1801434 13000 4.8 -0.80 4.0
ATLAS_2022_I2037744 13000 3.3 +0.90 4.2
ATLAS_2022_I2077575 13000 2.2* -0.30 1.9*
CMS_2018_I1703993 13000 76 +4.0 80
CMS_2021_I1901295 13000 17 +1.0 18
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.3 -1.9 3.4
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.6* +0.30 2.9
CMS_2021_I1901295 13000 31 +3.0 34
Ttbar rapidity
 ATLAS_2019_I1750330 13000 7.4 -0.10 7.3
ATLAS_2020_I1801434 13000 4.0* -0.30 3.7
ATLAS_2022_I2037744 13000 1.3 -0.43 0.87
ATLAS_2022_I2077575 13000 2.6* +1.2 3.8*
CMS_2018_I1703993 13000 69 +1.0 70
CMS_2021_I1901295 13000 27 +3.0 30
Mean rapidity
 ATLAS_2019_I1750330 13000 10 +1.0 11
ATLAS_2020_I1801434 13000 4.9 -1.7 3.2
ATLAS_2022_I2077575 13000 2.6* 0 2.6
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.4 +2.2 4.6
ttbarej.m
 CMS_2021_I1901295 13000 19 +2.0 21
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.9 -1.6 4.3
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 6.1 -2.3 3.8
Cross sections
 ATLAS_2022_I2037744 13000 0.18 -0.18 0.00013
ATLAS_2022_I2077575 13000 8.0 +2.0 10
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.