Generator / tune

Details for Pythia 6.426 360 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 0.17 - n/a
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 6.7 - n/a
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 1.5 - n/a
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 2.2 - n/a
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 1.4 - n/a
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 1.3 - n/a
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 0.32 0 0.32
B jet
 η
 CMS_2018_I1703993 13000 63 -6.0 57
B jet
 pT
 CMS_2018_I1703993 13000 75 -8.0 67
bjbj.m
 CMS_2018_I1703993 13000 91 -8.0 83
bjbj.pt
 CMS_2018_I1703993 13000 81 -10 71
bjt.dphi
 ATLAS_2022_I2037744 13000 1.1 +0.90 2.0
ej.pt
 ATLAS_2022_I2037744 13000 2.4 +0.80 3.2*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.4 -0.70 2.7
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.4 -0.30 3.1
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.7 -0.60 3.1
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.5 +0.20 2.7
ejej.dphi
 ATLAS_2022_I2037744 13000 0.82 +0.98 1.8
ejets.ht
 CMS_2021_I1901295 13000 18 +3.0 21
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.8 -0.60 3.2
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.4 -0.70 2.7
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.096 +0.094 0.19
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.013 +0.12 0.13
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 5.3 - n/a
CMS_2019_I1764472 13000 0.76 -0.23 0.53
Jet pT
 ATLAS_2014_I1304688 7000 19 -1.0 18
ATLAS_2019_I1718132 13000 n/a - n/a
Dijet
 Δη
 ATLAS_2019_I1718132 13000 n/a - 27
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 n/a - 31
Dijet
 HT
 ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 n/a - 41
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 1.4 0 1.4
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.21 0 0.21
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.8 +0.100 1.9
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.2 0 1.2
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.8 +0.20 2.0
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.0 -0.50 2.5
Lepton η
 ATLAS_2019_I1759875 13000 38 0 38
CMS_2018_I1703993 13000 38 -3.0 35
Lepton pT
 ATLAS_2019_I1759875 13000 52 -2.0 50
CMS_2018_I1703993 13000 73 -7.0 66
CMS_2021_I1901295 13000 16 -2.0 14
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 1.8 -0.30 1.5
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.19 -0.080 0.11
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 2.6 -0.10 2.5
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - 44*
Dilepton
 E
 ATLAS_2019_I1759875 13000 43 0 43
Dilepton
 Δη
 CMS_2016_I1430892 8000 0.71 - n/a
CMS_2018_I1703993 13000 52 -5.0 47
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - 23
ATLAS_2019_I1759875 13000 27 0 27
CMS_2018_I1703993 13000 65 -6.0 59
Dilepton
 HT
 ATLAS_2019_I1759875 13000 43 0 43
Dilepton
 m
 ATLAS_2019_I1759875 13000 41 0 41
CMS_2018_I1703993 13000 64 -6.0 58
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - 24
ATLAS_2019_I1759875 13000 44 -3.0 41
CMS_2018_I1703993 13000 60 -4.0 56
Dilepton
 y
 ATLAS_2019_I1759875 13000 31 -1.0 30
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 29 +3.0 32
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 25 -1.0 24
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 9.6 -1.6 8.0
CMS_2018_I1703993 13000 58 -5.0 53
sumpt
 ATLAS_2022_I2152933 13000 30 -3.0 27
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.9 +0.40 8.3
ATLAS_2020_I1801434 13000 6.3* -1.3 5.0
ATLAS_2022_I2077575 13000 2.1* -0.90 1.2
Top pT
 ATLAS_2019_I1750330 13000 6.3* +0.70 7.0*
ATLAS_2020_I1801434 13000 5.1 -0.70 4.4
ATLAS_2022_I2037744 13000 1.6 -0.10 1.5
ATLAS_2022_I2077575 13000 2.0* -0.40 1.6*
CMS_2018_I1703993 13000 89 -4.0 85
CMS_2021_I1901295 13000 25* +1.0 26*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 87 -4.0 83
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.6 -0.50 5.1
Top rapidity
 ATLAS_2019_I1750330 13000 7.7 +0.30 8.0
ATLAS_2020_I1801434 13000 5.9 -0.70 5.2
ATLAS_2022_I2037744 13000 1.3 +0.70 2.0
ATLAS_2022_I2077575 13000 2.1* -0.20 1.9*
CMS_2018_I1703993 13000 81 -3.0 78
CMS_2021_I1901295 13000 26 -1.0 25
topej.dphi
 ATLAS_2022_I2037744 13000 2.6 +0.20 2.8
topej.m
 ATLAS_2022_I2037744 13000 1.7 +0.40 2.1
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.0 +1.2 9.2
ATLAS_2020_I1801434 13000 5.2 -0.30 4.9
ATLAS_2022_I2077575 13000 2.3* -0.100 2.2*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.3 +0.70 8.0
ATLAS_2020_I1801434 13000 8.9 -2.1 6.8
ATLAS_2022_I2037744 13000 2.1 +6.6 8.7
ATLAS_2022_I2077575 13000 2.1 -0.20 1.9
CMS_2018_I1703993 13000 120 0 120
CMS_2021_I1901295 13000 35 +2.0 37
Δy (ttbar)
 CMS_2016_I1430892 8000 0.50 - n/a
CMS_2018_I1703993 13000 88 0 88
CMS_2021_I1901295 13000 26 0 26
ttbar HT
 ATLAS_2019_I1750330 13000 6.4 0 6.4
ATLAS_2020_I1801434 13000 4.8 -1.2 3.6
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 2.4* -0.10 2.3*
CMS_2021_I1901295 13000 n/a - 24
m(ttbar)
 ATLAS_2019_I1750330 13000 5.2* +0.70 5.9*
ATLAS_2020_I1801434 13000 4.9 -0.30 4.6
ATLAS_2022_I2037744 13000 n/a - 2.5
ATLAS_2022_I2077575 13000 1.7* 0 1.7*
CMS_2018_I1703993 13000 91 +5.0 96
CMS_2021_I1901295 13000 32* -1.0 31
Pcrossttbar
 ATLAS_2020_I1801434 13000 5.8 -0.60 5.2
ttbar pT
 ATLAS_2019_I1750330 13000 6.9 +0.60 7.5
ATLAS_2020_I1801434 13000 5.3 -0.50 4.8
ATLAS_2022_I2037744 13000 1.7 +0.90 2.6
ATLAS_2022_I2077575 13000 1.8* -0.30 1.5*
CMS_2018_I1703993 13000 78 -4.0 74
CMS_2021_I1901295 13000 20 +3.0 23
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.5 -0.80 3.7
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 1.6 +1.0 2.6*
CMS_2021_I1901295 13000 34 -1.0 33
Ttbar rapidity
 ATLAS_2019_I1750330 13000 7.2 +0.20 7.4
ATLAS_2020_I1801434 13000 3.8 -0.40 3.4
ATLAS_2022_I2037744 13000 1.4 +0.30 1.7
ATLAS_2022_I2077575 13000 2.5* -0.50 2.0
CMS_2018_I1703993 13000 74 -1.0 73
CMS_2021_I1901295 13000 30 0 30
Mean rapidity
 ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 4.0 +0.20 4.2
ATLAS_2022_I2077575 13000 3.0* -1.0 2.0
ttbarej.ht
 ATLAS_2022_I2037744 13000 1.3 +0.40 1.7
ttbarej.m
 CMS_2021_I1901295 13000 25 0 25
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.2 +0.20 5.4
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.4 -0.50 4.9
Cross sections
 ATLAS_2022_I2037744 13000 3.6 +2.2 5.8
ATLAS_2022_I2077575 13000 7.4 -0.50 6.9
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.