Generator / tune

Details for Pythia 6.426 pro-q2o 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 0.50 +1.8 2.3
B jet
η
CMS_2018_I1703993 13000 140 0 140
B jet
pT
CMS_2018_I1703993 13000 180 0 180
bjbj.m
CMS_2018_I1703993 13000 210 +10 220
bjbj.pt
CMS_2018_I1703993 13000 190 +10 200
bjt.dphi
ATLAS_2022_I2037744 13000 1.2 +0.30 1.5
ej.pt
ATLAS_2022_I2037744 13000 3.5 -0.50 3.0
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 4.4 -0.30 4.1
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 5.1 -0.80 4.3
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 4.8 -0.60 4.2
ΔR(extra jets)
ATLAS_2020_I1801434 13000 3.2 0 3.2
ejej.dphi
ATLAS_2022_I2037744 13000 1.1 -0.62 0.48
ejets.ht
CMS_2021_I1901295 13000 22 0 22
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 4.5 -0.50 4.0
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 4.1 -0.100 4.0
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.082 +0.028 0.11
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.096 -0.014 0.082
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 2.2 +0.20 2.4
Jet pT
ATLAS_2014_I1304688 7000 26 -1.0 25
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 1.2 +0.20 1.4
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.22 +0.020 0.24
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.8 -0.50 1.3
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.0 -0.12 0.88
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.8 -0.60 1.2
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.2 -0.50 1.7
Lepton η
ATLAS_2019_I1759875 13000 35 +5.0 40
CMS_2018_I1703993 13000 84 0 84
Lepton pT
ATLAS_2019_I1759875 13000 47 +7.0 54
CMS_2018_I1703993 13000 170 +10 180
CMS_2021_I1901295 13000 17 0 17
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 2.9 +1.0 3.9
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.28 +0.080 0.36
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 2.9 +0.90 3.8
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 39 +7.0 46
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 24 +3.0 27
CMS_2018_I1703993 13000 140 -10 130
Dilepton
HT
ATLAS_2019_I1759875 13000 38 +5.0 43
Dilepton
m
ATLAS_2019_I1759875 13000 37 +7.0 44
CMS_2018_I1703993 13000 150 0 150
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 39 +6.0 45
CMS_2018_I1703993 13000 140 0 140
Dilepton
y
ATLAS_2019_I1759875 13000 32* 0 32
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 2.2 -1.1 1.1
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 30 +4.0 34
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 9.0 -2.5 6.5
CMS_2018_I1703993 13000 150 -10 140
sumpt
ATLAS_2022_I2152933 13000 3.6 -1.2 2.4
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 7.9 -0.30 7.6
ATLAS_2020_I1801434 13000 5.2 -0.90 4.3
ATLAS_2022_I2077575 13000 2.3 +0.60 2.9*
Top pT
ATLAS_2019_I1750330 13000 6.4 -0.40 6.0*
ATLAS_2020_I1801434 13000 5.3 -1.5 3.8
ATLAS_2022_I2037744 13000 1.6 -0.30 1.3
ATLAS_2022_I2077575 13000 1.6* +0.20 1.8*
CMS_2018_I1703993 13000 170 0 170
CMS_2021_I1901295 13000 32* -2.0 30
top.pt.ttbarRF
CMS_2018_I1703993 13000 170 0 170
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 5.9 -0.60 5.3
Top rapidity
ATLAS_2019_I1750330 13000 7.5 -0.100 7.4
ATLAS_2020_I1801434 13000 6.2 -1.3 4.9
ATLAS_2022_I2037744 13000 2.3 -0.50 1.8
ATLAS_2022_I2077575 13000 2.0* 0 2.0*
CMS_2018_I1703993 13000 150 0 150
CMS_2021_I1901295 13000 31 -1.0 30
topej.dphi
ATLAS_2022_I2037744 13000 3.4 -0.90 2.5
topej.m
ATLAS_2022_I2037744 13000 2.4 -1.2 1.2
χ(ttbar)
ATLAS_2019_I1750330 13000 9.0 +0.40 9.4
ATLAS_2020_I1801434 13000 6.7 -1.1 5.6
ATLAS_2022_I2077575 13000 3.4* -1.7 1.7
Δφ(ttbar)
ATLAS_2019_I1750330 13000 7.3 0 7.3
ATLAS_2020_I1801434 13000 6.9 -1.9 5.0
ATLAS_2022_I2037744 13000 1.8 +0.100 1.9
ATLAS_2022_I2077575 13000 1.8 0 1.8
CMS_2018_I1703993 13000 230 +10 240
CMS_2021_I1901295 13000 40 +1.0 41
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 160 0 160
CMS_2021_I1901295 13000 33 0 33
ttbar HT
ATLAS_2019_I1750330 13000 6.7 +0.100 6.8
ATLAS_2020_I1801434 13000 5.7 -2.1 3.6
ATLAS_2022_I2037744 13000 1.0 -0.36 0.64
ATLAS_2022_I2077575 13000 2.6* +0.60 3.2*
CMS_2021_I1901295 13000 30 -1.0 29
m(ttbar)
ATLAS_2019_I1750330 13000 4.8 +0.20 5.0*
ATLAS_2020_I1801434 13000 6.6 -2.5 4.1
ATLAS_2022_I2037744 13000 1.1 -0.41 0.69
ATLAS_2022_I2077575 13000 1.2* +0.30 1.5*
CMS_2018_I1703993 13000 160 +10 170
CMS_2021_I1901295 13000 43* -1.0 42
Pcrossttbar
ATLAS_2020_I1801434 13000 5.6 -1.2 4.4
ttbar pT
ATLAS_2019_I1750330 13000 7.4 +0.20 7.6
ATLAS_2020_I1801434 13000 5.3 -1.1 4.2
ATLAS_2022_I2037744 13000 2.1 +0.10 2.2
ATLAS_2022_I2077575 13000 1.6* +0.30 1.9*
CMS_2018_I1703993 13000 160 0 160
CMS_2021_I1901295 13000 24 -1.0 23
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 4.8 -1.4 3.4
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.3 -0.30 2.0
CMS_2021_I1901295 13000 44 0 44
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.0 -0.100 6.9
ATLAS_2020_I1801434 13000 4.3 -1.3 3.0
ATLAS_2022_I2037744 13000 0.55 +1.1 1.6
ATLAS_2022_I2077575 13000 2.5 -0.80 1.7
CMS_2018_I1703993 13000 140 0 140
CMS_2021_I1901295 13000 39 0 39
Mean rapidity
ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 4.6 -0.70 3.9
ATLAS_2022_I2077575 13000 2.7 -0.80 1.9
ttbarej.ht
ATLAS_2022_I2037744 13000 5.5 -2.5 3.0
ttbarej.m
CMS_2021_I1901295 13000 28 +1.0 29
pT ratio
W to b
ATLAS_2020_I1801434 13000 5.6 -0.90 4.7
pT ratio
W to top
ATLAS_2020_I1801434 13000 5.8 -0.90 4.9
Cross sections
ATLAS_2022_I2037744 13000 0.15 +1.5 1.6
ATLAS_2022_I2077575 13000 7.7 +0.70 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.