Generator / tune

Details for Pythia 6.427 pro-q2o 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 2.3 -1.7 0.62
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 220 0 220
bjbj.pt
 CMS_2018_I1703993 13000 200 -10 190
bjt.dphi
 ATLAS_2022_I2037744 13000 1.5 -0.30 1.2
ej.pt
 ATLAS_2022_I2037744 13000 3.0 +0.40 3.4
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 4.1 +0.40 4.5
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.3 +0.60 4.9
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.2 +0.80 5.0
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.2 +0.40 3.6
ejej.dphi
 ATLAS_2022_I2037744 13000 0.48 +2.3 2.8
ejets.ht
 CMS_2021_I1901295 13000 22 0 22
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.0 +1.1 5.1
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 4.0 +0.100 4.1
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.11 +0.030 0.14
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.082 +0.058 0.14
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 2.4 -0.30 2.1
Jet pT
 ATLAS_2014_I1304688 7000 25 +2.0 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 0.24 -0.020 0.22
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.3 +0.40 1.7
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.88 +0.12 1.0
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.2 +0.50 1.7
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 1.7 +0.30 2.0
Lepton η
 ATLAS_2019_I1759875 13000 40 +3.0 43
CMS_2018_I1703993 13000 84 +1.0 85
Lepton pT
 ATLAS_2019_I1759875 13000 54 +4.0 58
CMS_2018_I1703993 13000 180 0 180
CMS_2021_I1901295 13000 17 0 17
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 3.9 -0.80 3.1
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.36 -0.010 0.35
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 3.8 -0.50 3.3
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 46 +3.0 49
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 27 +2.0 29
CMS_2018_I1703993 13000 130 +10 140
Dilepton
 HT
 ATLAS_2019_I1759875 13000 43 +6.0 49
Dilepton
 m
 ATLAS_2019_I1759875 13000 44 0 44
CMS_2018_I1703993 13000 150 0 150
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 45 +3.0 48
CMS_2018_I1703993 13000 140 0 140
Dilepton
 y
 ATLAS_2019_I1759875 13000 32 +2.0 34
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 1.1 +1.6 2.7
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 34 -1.0 33
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.5 +0.100 6.6
CMS_2018_I1703993 13000 140 0 140
sumpt
 ATLAS_2022_I2152933 13000 2.4 0 2.4
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.6 +0.30 7.9
ATLAS_2020_I1801434 13000 4.3 +0.10 4.4
ATLAS_2022_I2077575 13000 2.9* 0 2.9*
Top pT
 ATLAS_2019_I1750330 13000 6.0* +0.60 6.6
ATLAS_2020_I1801434 13000 3.8 +0.40 4.2
ATLAS_2022_I2037744 13000 1.3 +0.70 2.0
ATLAS_2022_I2077575 13000 1.8* -0.20 1.6*
CMS_2018_I1703993 13000 170 0 170
CMS_2021_I1901295 13000 30 0 30*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 170 0 170
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.3 +0.80 6.1
Top rapidity
 ATLAS_2019_I1750330 13000 7.4 +0.100 7.5
ATLAS_2020_I1801434 13000 4.9 +1.9 6.8
ATLAS_2022_I2037744 13000 1.8 -0.83 0.97*
ATLAS_2022_I2077575 13000 2.0* +0.30 2.3*
CMS_2018_I1703993 13000 150 0 150
CMS_2021_I1901295 13000 30 +1.0 31
topej.dphi
 ATLAS_2022_I2037744 13000 2.5 +0.70 3.2
topej.m
 ATLAS_2022_I2037744 13000 1.2 +1.3 2.5
χ(ttbar)
 ATLAS_2019_I1750330 13000 9.4 -0.60 8.8
ATLAS_2020_I1801434 13000 5.6 +0.30 5.9
ATLAS_2022_I2077575 13000 1.7 +2.5 4.2*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.3 0 7.3
ATLAS_2020_I1801434 13000 5.0 +0.100 5.1
ATLAS_2022_I2037744 13000 1.9 0 1.9
ATLAS_2022_I2077575 13000 1.8 +0.60 2.4
CMS_2018_I1703993 13000 240 0 240
CMS_2021_I1901295 13000 41 -1.0 40
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 160 0 160
CMS_2021_I1901295 13000 33 -1.0 32
ttbar HT
 ATLAS_2019_I1750330 13000 6.8 +0.10 6.9
ATLAS_2020_I1801434 13000 3.6 +0.90 4.5
ATLAS_2022_I2037744 13000 0.64 +0.21 0.85
ATLAS_2022_I2077575 13000 3.2* -1.4 1.8
CMS_2021_I1901295 13000 29 +1.0 30
m(ttbar)
 ATLAS_2019_I1750330 13000 5.0* -0.30 4.7
ATLAS_2020_I1801434 13000 4.1 +1.2 5.3
ATLAS_2022_I2037744 13000 0.69 +1.6 2.3
ATLAS_2022_I2077575 13000 1.5* -0.20 1.3*
CMS_2018_I1703993 13000 170 0 170
CMS_2021_I1901295 13000 42 -1.0 41
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.4 +0.70 5.1
ttbar pT
 ATLAS_2019_I1750330 13000 7.6 +0.20 7.8
ATLAS_2020_I1801434 13000 4.2 +0.50 4.7
ATLAS_2022_I2037744 13000 2.2 +0.50 2.7
ATLAS_2022_I2077575 13000 1.9* -0.40 1.5
CMS_2018_I1703993 13000 160 0 160
CMS_2021_I1901295 13000 23 +1.0 24
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 3.4 +2.6 6.0
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.0 +1.6 3.6
CMS_2021_I1901295 13000 44 0 44
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.9 +0.100 7.0
ATLAS_2020_I1801434 13000 3.0 +0.20 3.2
ATLAS_2022_I2037744 13000 1.6 0 1.6
ATLAS_2022_I2077575 13000 1.7 0 1.7
CMS_2018_I1703993 13000 140 -10 130
CMS_2021_I1901295 13000 39 +2.0 41*
Mean rapidity
 ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 3.9 +0.60 4.5
ATLAS_2022_I2077575 13000 1.9 +0.20 2.1
ttbarej.ht
 ATLAS_2022_I2037744 13000 3.0 +0.50 3.5
ttbarej.m
 CMS_2021_I1901295 13000 29 -1.0 28
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.7 +0.50 5.2
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.9 +0.70 5.6
Cross sections
 ATLAS_2022_I2037744 13000 1.6 -1.1 0.48
ATLAS_2022_I2077575 13000 8.4 +0.90 9.3
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.