Generator / tune

Details for Pythia 6.426 ambt1 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 1.1 +0.70 1.8
B jet
η
CMS_2018_I1703993 13000 4.3 +1.3 5.6
B jet
pT
CMS_2018_I1703993 13000 6.6 +0.80 7.4
bjbj.m
CMS_2018_I1703993 13000 5.8 +1.8 7.6
bjbj.pt
CMS_2018_I1703993 13000 7.2 +1.00 8.2
bjt.dphi
ATLAS_2022_I2037744 13000 1.5 -0.30 1.2
ej.pt
ATLAS_2022_I2037744 13000 3.1 +0.10 3.2
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 1.3 -0.57 0.73
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 0.58 +0.42 1.0
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 1.2 0 1.2
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.3 -0.84 0.46
ejej.dphi
ATLAS_2022_I2037744 13000 1.6 +0.60 2.2
ejets.ht
CMS_2021_I1901295 13000 3.2 +0.60 3.8
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 0.83 +0.97 1.8
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 0.74 +0.23 0.97
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.70 -0.17 0.53
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.43 -0.100 0.33
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.3 -0.46 0.84
Jet pT
ATLAS_2014_I1304688 7000 4.8 0 4.8
ATLAS_2019_I1718132 13000 n/a - n/a
Dijet
Δη
ATLAS_2019_I1718132 13000 n/a - 1.2
Dijet
Δφ
ATLAS_2019_I1718132 13000 n/a - 2.9
Dijet
HT
ATLAS_2019_I1718132 13000 n/a - 2.8
Jet mass
Dijet mass
ATLAS_2019_I1718132 13000 n/a - 2.1
Jet Shapes
Differential Jet Shape
ATLAS_2013_I1243871 7000 3.2 +1.1 4.3
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.62 +0.30 0.92
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 2.2 0 2.2
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.4 +0.20 1.6
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 2.1 +0.10 2.2
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.9 +0.30 3.2
Lepton η
ATLAS_2019_I1759875 13000 8.3 +0.90 9.2
CMS_2018_I1703993 13000 2.7 +1.2 3.9
Lepton pT
ATLAS_2019_I1759875 13000 8.9 +2.1 11
CMS_2018_I1703993 13000 6.1 -0.30 5.8
CMS_2021_I1901295 13000 3.5 -1.3 2.2
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.8 -0.80 4.0
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.95 -0.030 0.92
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 6.8 -0.50 6.3
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - 1.7*
Dilepton
E
ATLAS_2019_I1759875 13000 7.7 +0.40 8.1
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 3.7 +0.90 4.6
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - 1.2
ATLAS_2019_I1759875 13000 5.9 +0.70 6.6
CMS_2018_I1703993 13000 10 -3.7 6.3
Dilepton
HT
ATLAS_2019_I1759875 13000 8.3 +0.90 9.2
Dilepton
m
ATLAS_2019_I1759875 13000 9.5 +0.30 9.8
CMS_2018_I1703993 13000 7.4 -1.4 6.0
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 8.7 0 8.7
CMS_2018_I1703993 13000 6.5 -1.0 5.5
Dilepton
y
ATLAS_2019_I1759875 13000 7.2* +1.3 8.5
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 1.00 +1.6 2.6
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 3.9
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 2.3 +0.80 3.1
CMS_2018_I1703993 13000 9.5 +2.5 12
sumpt
ATLAS_2022_I2152933 13000 3.9 +3.4 7.3
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 2.7 -0.20 2.5
ATLAS_2020_I1801434 13000 2.5 -0.10 2.4
ATLAS_2022_I2077575 13000 3.7* +1.2 4.9*
Top pT
ATLAS_2019_I1750330 13000 2.1 -0.10 2.0
ATLAS_2020_I1801434 13000 1.4* +0.70 2.1
ATLAS_2022_I2037744 13000 1.5 +0.10 1.6
ATLAS_2022_I2077575 13000 2.2* -0.10 2.1*
CMS_2018_I1703993 13000 14 +1.0 15
CMS_2021_I1901295 13000 5.2 -0.70 4.5*
top.pt.ttbarRF
CMS_2018_I1703993 13000 10 +3.0 13
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 1.2 +1.5 2.7
Top rapidity
ATLAS_2019_I1750330 13000 2.1 +0.50 2.6
ATLAS_2020_I1801434 13000 1.4 +1.2 2.6
ATLAS_2022_I2037744 13000 1.2* 0 1.2
ATLAS_2022_I2077575 13000 2.7* -0.50 2.2*
CMS_2018_I1703993 13000 8.9 +2.1 11
CMS_2021_I1901295 13000 3.7 +0.30 4.0
topej.dphi
ATLAS_2022_I2037744 13000 2.9 +0.10 3.0
topej.m
ATLAS_2022_I2037744 13000 1.8 -0.60 1.2
χ(ttbar)
ATLAS_2019_I1750330 13000 3.0 -0.20 2.8
ATLAS_2020_I1801434 13000 1.3 +0.20 1.5
ATLAS_2022_I2077575 13000 3.8* -1.2 2.6
Δφ(ttbar)
ATLAS_2019_I1750330 13000 1.6 +0.30 1.9
ATLAS_2020_I1801434 13000 1.8 +1.2 3.0
ATLAS_2022_I2037744 13000 3.2 -1.0 2.2
ATLAS_2022_I2077575 13000 3.1 -0.40 2.7
CMS_2018_I1703993 13000 12 +2.0 14
CMS_2021_I1901295 13000 4.3 -0.20 4.1
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 11 +2.0 13
CMS_2021_I1901295 13000 4.6 -1.00 3.6
ttbar HT
ATLAS_2019_I1750330 13000 2.2 -0.10 2.1
ATLAS_2020_I1801434 13000 1.4 -0.100 1.3
ATLAS_2022_I2037744 13000 1.5 - n/a
ATLAS_2022_I2077575 13000 2.7 0 2.7
CMS_2021_I1901295 13000 4.4 -0.50 3.9
m(ttbar)
ATLAS_2019_I1750330 13000 1.6 -0.20 1.4*
ATLAS_2020_I1801434 13000 0.79 +0.91 1.7
ATLAS_2022_I2037744 13000 1.3 0 1.3
ATLAS_2022_I2077575 13000 2.2* -0.10 2.1*
CMS_2018_I1703993 13000 18 +1.0 19
CMS_2021_I1901295 13000 7.3 -1.7 5.6
Pcrossttbar
ATLAS_2020_I1801434 13000 2.0 -0.10 1.9
ttbar pT
ATLAS_2019_I1750330 13000 2.6 +0.20 2.8
ATLAS_2020_I1801434 13000 2.3* 0 2.3
ATLAS_2022_I2037744 13000 2.4 -0.10 2.3
ATLAS_2022_I2077575 13000 2.2* +0.100 2.3*
CMS_2018_I1703993 13000 16 0 16
CMS_2021_I1901295 13000 4.2 -0.40 3.8
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 0.93 +4.5 5.4
ttbar.thetaStar
ATLAS_2022_I2077575 13000 4.5* -1.5 3.0
CMS_2021_I1901295 13000 6.8 -1.6 5.2
Ttbar rapidity
ATLAS_2019_I1750330 13000 1.9 +0.40 2.3
ATLAS_2020_I1801434 13000 1.2 +1.0 2.2*
ATLAS_2022_I2037744 13000 0.97 +1.2 2.2
ATLAS_2022_I2077575 13000 2.3 +0.30 2.6
CMS_2018_I1703993 13000 8.0 +3.0 11
CMS_2021_I1901295 13000 5.6 -0.60 5.0
Mean rapidity
ATLAS_2019_I1750330 13000 2.6 +0.50 3.1
ATLAS_2020_I1801434 13000 1.4 +1.1 2.5
ATLAS_2022_I2077575 13000 2.2 +1.0 3.2
ttbarej.ht
ATLAS_2022_I2037744 13000 5.0 -1.7 3.3
ttbarej.m
CMS_2021_I1901295 13000 n/a - 3.0
pT ratio
W to b
ATLAS_2020_I1801434 13000 0.93 +0.47 1.4
pT ratio
W to top
ATLAS_2020_I1801434 13000 1.0 +1.0 2.0
Cross sections
ATLAS_2022_I2037744 13000 5.6 +2.0 7.6
ATLAS_2022_I2077575 13000 17 +2.0 19
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.