Generator / tune

Details for Pythia 6.427 ambt1 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 1.8 - n/a
B jet
η
CMS_2018_I1703993 13000 5.6 +1.1 6.7
B jet
pT
CMS_2018_I1703993 13000 7.4 +1.0 8.4
bjbj.m
CMS_2018_I1703993 13000 7.6 +2.0 9.6
bjbj.pt
CMS_2018_I1703993 13000 8.2 +1.5 9.7
bjt.dphi
ATLAS_2022_I2037744 13000 1.2 +0.20 1.4
ej.pt
ATLAS_2022_I2037744 13000 3.2 +0.100 3.3
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 0.73 -0.44 0.29
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 1.0 +0.70 1.7
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 1.2 +0.30 1.5
ΔR(extra jets)
ATLAS_2020_I1801434 13000 0.46 +1.2 1.7
ejej.dphi
ATLAS_2022_I2037744 13000 2.2 -0.80 1.4
ejets.ht
CMS_2021_I1901295 13000 3.8 -0.40 3.4
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 1.8 -0.40 1.4
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 0.97 0 0.97*
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.53 +0.15 0.68
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.33 0 0.33
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.84 -0.57 0.27
Jet pT
ATLAS_2014_I1304688 7000 4.8 -0.100 4.7
ATLAS_2019_I1718132 13000 n/a - n/a
Dijet
Δη
ATLAS_2019_I1718132 13000 1.2 - n/a
Dijet
Δφ
ATLAS_2019_I1718132 13000 2.9 - n/a
Dijet
HT
ATLAS_2019_I1718132 13000 2.8 - n/a
Jet mass
Dijet mass
ATLAS_2019_I1718132 13000 2.1 - n/a
Jet Shapes
Differential Jet Shape
ATLAS_2013_I1243871 7000 4.3 0 4.3
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.92 +0.020 0.94
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 2.2 -0.10 2.1
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.6 0 1.6
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 2.2 0 2.2
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 3.2 -0.10 3.1
Lepton η
ATLAS_2019_I1759875 13000 9.2 -2.4 6.8
CMS_2018_I1703993 13000 3.9 +0.40 4.3
Lepton pT
ATLAS_2019_I1759875 13000 11 -2.3 8.7
CMS_2018_I1703993 13000 5.8 +1.2 7.0
CMS_2021_I1901295 13000 2.2 +0.30 2.5
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.0 +1.6 5.6
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.92 +0.020 0.94
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 6.3 +1.6 7.9
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 1.7* - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 8.1 -1.4 6.7
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 4.6 +1.3 5.9
Dilepton
Δφ
ATLAS_2019_I1718132 13000 1.2 - n/a
ATLAS_2019_I1759875 13000 6.6 -1.2 5.4
CMS_2018_I1703993 13000 6.3 +2.5 8.8
Dilepton
HT
ATLAS_2019_I1759875 13000 9.2 -2.3 6.9
Dilepton
m
ATLAS_2019_I1759875 13000 9.8 -2.9 6.9
CMS_2018_I1703993 13000 6.0 +1.5 7.5
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 8.7 -1.2 7.5
CMS_2018_I1703993 13000 5.5 +0.40 5.9
Dilepton
y
ATLAS_2019_I1759875 13000 8.5 -3.4 5.1
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 2.6 -1.2 1.4
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 3.9 -0.10 3.8
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 3.1 +0.60 3.7
CMS_2018_I1703993 13000 12 0 12
sumpt
ATLAS_2022_I2152933 13000 7.3 -2.8 4.5
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 2.5 +0.40 2.9
ATLAS_2020_I1801434 13000 2.4 +0.20 2.6
ATLAS_2022_I2077575 13000 4.9* -3.0 1.9
Top pT
ATLAS_2019_I1750330 13000 2.0 0 2.0
ATLAS_2020_I1801434 13000 2.1 +0.60 2.7*
ATLAS_2022_I2037744 13000 1.6 -0.10 1.5
ATLAS_2022_I2077575 13000 2.1* -0.40 1.7*
CMS_2018_I1703993 13000 15 0 15
CMS_2021_I1901295 13000 4.5* +0.40 4.9*
top.pt.ttbarRF
CMS_2018_I1703993 13000 13 -2.0 11
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 2.7 -0.60 2.1
Top rapidity
ATLAS_2019_I1750330 13000 2.6 -0.30 2.3
ATLAS_2020_I1801434 13000 2.6 -0.50 2.1
ATLAS_2022_I2037744 13000 1.2 -0.20 1.0*
ATLAS_2022_I2077575 13000 2.2* -0.20 2.0*
CMS_2018_I1703993 13000 11 -1.0 10
CMS_2021_I1901295 13000 4.0 -0.40 3.6
topej.dphi
ATLAS_2022_I2037744 13000 3.0 -0.10 2.9
topej.m
ATLAS_2022_I2037744 13000 1.2 +0.50 1.7
χ(ttbar)
ATLAS_2019_I1750330 13000 2.8 0 2.8
ATLAS_2020_I1801434 13000 1.5 +2.3 3.8
ATLAS_2022_I2077575 13000 2.6 +0.90 3.5*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 1.9 +0.10 2.0
ATLAS_2020_I1801434 13000 3.0 +0.90 3.9
ATLAS_2022_I2037744 13000 2.2 +0.80 3.0
ATLAS_2022_I2077575 13000 2.7 -0.70 2.0
CMS_2018_I1703993 13000 14 +2.0 16
CMS_2021_I1901295 13000 4.1 -0.100 4.0
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 13 -1.0 12
CMS_2021_I1901295 13000 3.6 +0.30 3.9
ttbar HT
ATLAS_2019_I1750330 13000 2.1 0 2.1
ATLAS_2020_I1801434 13000 1.3 +1.2 2.5
ATLAS_2022_I2037744 13000 n/a - 0.98
ATLAS_2022_I2077575 13000 2.7 - n/a
CMS_2021_I1901295 13000 3.9 -0.90 3.0
m(ttbar)
ATLAS_2019_I1750330 13000 1.4* -0.20 1.2
ATLAS_2020_I1801434 13000 1.7 +2.4 4.1
ATLAS_2022_I2037744 13000 1.3 +0.30 1.6
ATLAS_2022_I2077575 13000 2.1* -0.10 2.0*
CMS_2018_I1703993 13000 19 +1.0 20
CMS_2021_I1901295 13000 5.6 +2.0 7.6
Pcrossttbar
ATLAS_2020_I1801434 13000 1.9 +0.10 2.0
ttbar pT
ATLAS_2019_I1750330 13000 2.8 +0.20 3.0
ATLAS_2020_I1801434 13000 2.3 +1.3 3.6*
ATLAS_2022_I2037744 13000 2.3 +0.10 2.4
ATLAS_2022_I2077575 13000 2.3* -0.70 1.6*
CMS_2018_I1703993 13000 16 +3.0 19
CMS_2021_I1901295 13000 3.8 -0.20 3.6
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 5.4 -1.0 4.4
ttbar.thetaStar
ATLAS_2022_I2077575 13000 3.0 -0.10 2.9
CMS_2021_I1901295 13000 5.2 +1.8 7.0
Ttbar rapidity
ATLAS_2019_I1750330 13000 2.3 -0.100 2.2
ATLAS_2020_I1801434 13000 2.2* +0.30 2.5
ATLAS_2022_I2037744 13000 2.2 -0.10 2.1
ATLAS_2022_I2077575 13000 2.6 +0.30 2.9*
CMS_2018_I1703993 13000 11 -2.0 9.0
CMS_2021_I1901295 13000 5.0 +0.100 5.1
Mean rapidity
ATLAS_2019_I1750330 13000 3.1 -0.80 2.3
ATLAS_2020_I1801434 13000 2.5 -0.70 1.8
ATLAS_2022_I2077575 13000 3.2 -0.20 3.0*
ttbarej.ht
ATLAS_2022_I2037744 13000 3.3 -0.50 2.8
ttbarej.m
CMS_2021_I1901295 13000 3.0 - n/a
pT ratio
W to b
ATLAS_2020_I1801434 13000 1.4 -0.100 1.3
pT ratio
W to top
ATLAS_2020_I1801434 13000 2.0 -0.90 1.1
Cross sections
ATLAS_2022_I2037744 13000 7.6 +1.9 9.5
ATLAS_2022_I2077575 13000 19 -8.0 11
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.