Generator / tune

Details for Pythia 6.426 d6t 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 0.61 - n/a
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 3.9 - n/a
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 1.1 - n/a
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 1.8 - n/a
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 0.62 - n/a
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 2.8 - n/a
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 0.34 - n/a
B jet
 η
 CMS_2018_I1703993 13000 130 0 130
B jet
 pT
 CMS_2018_I1703993 13000 160 +10 170
bjbj.m
 CMS_2018_I1703993 13000 200 0 200
bjbj.pt
 CMS_2018_I1703993 13000 180 0 180
bjt.dphi
 ATLAS_2022_I2037744 13000 2.8 -2.1 0.75
ej.pt
 ATLAS_2022_I2037744 13000 3.3 -0.40 2.9
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 5.0 +1.0 6.0
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 5.2 +1.4 6.6
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 5.3 +1.5 6.8
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 4.1* +0.60 4.7
ejej.dphi
 ATLAS_2022_I2037744 13000 0.72 +0.11 0.83
ejets.ht
 CMS_2021_I1901295 13000 22 -1.0 21
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 5.0 +1.2 6.2
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 4.1 +1.0 5.1*
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.039 +0.091 0.13
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.026 +0.050 0.076
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 31 - n/a
CMS_2019_I1764472 13000 3.3 -1.1 2.2
Jet pT
 ATLAS_2014_I1304688 7000 27 0 27
ATLAS_2019_I1718132 13000 n/a - 10*
Dijet
 Δη
 ATLAS_2019_I1718132 13000 n/a - 12
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 n/a - 11
Dijet
 HT
 ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 n/a - 14
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 1.3 +0.40 1.7
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.35 +0.040 0.39
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.2 +0.10 1.3
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.59 +0.15 0.74
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.4 -0.100 1.3
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 1.3 +0.70 2.0
Lepton η
 ATLAS_2019_I1759875 13000 38 +1.0 39
CMS_2018_I1703993 13000 79 +1.0 80
Lepton pT
 ATLAS_2019_I1759875 13000 51 +1.0 52
CMS_2018_I1703993 13000 160 +10 170
CMS_2021_I1901295 13000 15 0 15
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.9 +0.30 7.2
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.57 +0.13 0.70
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 6.2 +1.0 7.2
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - 18*
Dilepton
 E
 ATLAS_2019_I1759875 13000 42 +2.0 44
Dilepton
 Δη
 CMS_2016_I1430892 8000 0.50 - n/a
CMS_2018_I1703993 13000 110 +10 120
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - 6.5
ATLAS_2019_I1759875 13000 26 +3.0 29
CMS_2018_I1703993 13000 130 +20 150
Dilepton
 HT
 ATLAS_2019_I1759875 13000 42 +2.0 44
Dilepton
 m
 ATLAS_2019_I1759875 13000 41 +1.0 42
CMS_2018_I1703993 13000 140 +10 150
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - 8.5
ATLAS_2019_I1759875 13000 41 +3.0 44
CMS_2018_I1703993 13000 130 +10 140
Dilepton
 y
 ATLAS_2019_I1759875 13000 32 -1.0 31
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 2.1 +0.70 2.8
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 28 0 28
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.4 +2.4 8.8
CMS_2018_I1703993 13000 130 0 130
sumpt
 ATLAS_2022_I2152933 13000 6.3 +2.7 9.0
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.3 +0.20 7.5
ATLAS_2020_I1801434 13000 4.6 +1.5 6.1*
ATLAS_2022_I2077575 13000 1.1* +1.0 2.1
Top pT
 ATLAS_2019_I1750330 13000 6.0 +0.100 6.1
ATLAS_2020_I1801434 13000 4.6 +1.3 5.9
ATLAS_2022_I2037744 13000 1.6 -0.20 1.4
ATLAS_2022_I2077575 13000 1.3* -0.10 1.2*
CMS_2018_I1703993 13000 150 +10 160
CMS_2021_I1901295 13000 27* 0 27*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 160 0 160
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 6.7 +1.1 7.8
Top rapidity
 ATLAS_2019_I1750330 13000 7.5 -0.40 7.1
ATLAS_2020_I1801434 13000 5.8 +1.7 7.5
ATLAS_2022_I2037744 13000 1.1* -0.10 1.0
ATLAS_2022_I2077575 13000 1.3* +0.20 1.5
CMS_2018_I1703993 13000 130 +10 140
CMS_2021_I1901295 13000 25 +1.0 26
topej.dphi
 ATLAS_2022_I2037744 13000 3.4 -0.30 3.1
topej.m
 ATLAS_2022_I2037744 13000 1.7 -0.30 1.4
χ(ttbar)
 ATLAS_2019_I1750330 13000 9.0 -0.20 8.8
ATLAS_2020_I1801434 13000 7.0 +0.70 7.7
ATLAS_2022_I2077575 13000 2.3* -0.20 2.1*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 6.9 +0.100 7.0
ATLAS_2020_I1801434 13000 5.2 +1.9 7.1
ATLAS_2022_I2037744 13000 2.8 -1.4 1.4
ATLAS_2022_I2077575 13000 1.3* +0.70 2.0
CMS_2018_I1703993 13000 230 0 230
CMS_2021_I1901295 13000 38 -1.0 37
Δy (ttbar)
 CMS_2016_I1430892 8000 0.18 - n/a
CMS_2018_I1703993 13000 140 +10 150
CMS_2021_I1901295 13000 28 +1.0 29
ttbar HT
 ATLAS_2019_I1750330 13000 6.0 +0.30 6.3
ATLAS_2020_I1801434 13000 4.8 +2.8 7.6
ATLAS_2022_I2037744 13000 1.6 -0.50 1.1
ATLAS_2022_I2077575 13000 1.6* -0.20 1.4
CMS_2021_I1901295 13000 25 0 25
m(ttbar)
 ATLAS_2019_I1750330 13000 5.1 -0.20 4.9
ATLAS_2020_I1801434 13000 7.0 +0.20 7.2
ATLAS_2022_I2037744 13000 n/a - 1.4
ATLAS_2022_I2077575 13000 1.1* -0.10 1.00*
CMS_2018_I1703993 13000 160 0 160
CMS_2021_I1901295 13000 36 +2.0 38*
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.9 +1.8 6.7
ttbar pT
 ATLAS_2019_I1750330 13000 7.1 0 7.1
ATLAS_2020_I1801434 13000 4.7* +1.7 6.4
ATLAS_2022_I2037744 13000 2.7 -0.70 2.0
ATLAS_2022_I2077575 13000 1.4* -0.43 0.97*
CMS_2018_I1703993 13000 150 +10 160
CMS_2021_I1901295 13000 21 0 21
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.8 +1.8 7.6
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 1.5 0 1.5
CMS_2021_I1901295 13000 38 +2.0 40
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.7 -0.10 6.6
ATLAS_2020_I1801434 13000 3.8 +2.2 6.0
ATLAS_2022_I2037744 13000 1.2 -0.47 0.73
ATLAS_2022_I2077575 13000 1.9* -0.60 1.3
CMS_2018_I1703993 13000 120 +10 130
CMS_2021_I1901295 13000 33 +3.0 36
Mean rapidity
 ATLAS_2019_I1750330 13000 10 0 10
ATLAS_2020_I1801434 13000 4.6 +2.2 6.8
ATLAS_2022_I2077575 13000 2.1* -0.90 1.2
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.9 -0.20 2.7
ttbarej.m
 CMS_2021_I1901295 13000 27 0 27
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.7 +0.60 6.3
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.3 +1.9 7.2
Cross sections
 ATLAS_2022_I2037744 13000 2.4 -2.1 0.35
ATLAS_2022_I2077575 13000 4.6 +1.1 5.7
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.