Generator / tune

Details for Pythia 6.427 349 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 0.34 - n/a
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 4.6 - n/a
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 1.6 - n/a
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 1.1 - n/a
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 0.90 - n/a
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 0.54 - n/a
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 0.62 -0.37 0.25
B jet
η
CMS_2018_I1703993 13000 11 0 11
B jet
pT
CMS_2018_I1703993 13000 12 -1.0 11
bjbj.m
CMS_2018_I1703993 13000 16 -2.0 14
bjbj.pt
CMS_2018_I1703993 13000 12 -1.0 11
bjt.dphi
ATLAS_2022_I2037744 13000 0.68 +0.32 1.0
ej.pt
ATLAS_2022_I2037744 13000 2.3* +0.30 2.6*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 1.0 -0.12 0.88
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 1.3 +0.20 1.5
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 1.4 -0.30 1.1
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.2 0 1.2
ejej.dphi
ATLAS_2022_I2037744 13000 0.89 +0.81 1.7
ejets.ht
CMS_2021_I1901295 13000 7.1 -3.1 4.0
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 1.5 +0.40 1.9
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 1.5 -0.51 0.99
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.20 +0.41 0.61
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.070 +0.14 0.21
Jet mass
Jet mass
CMS_2017_I1518399 8000 2.1 - n/a
CMS_2019_I1764472 13000 0.66 - n/a
Jet pT
ATLAS_2014_I1304688 7000 7.1 -0.60 6.5
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 2.3 +0.20 2.5
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.29 +0.040 0.33
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.8 +0.40 2.2
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.3 +0.40 1.7
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.7 +0.70 2.4
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.5 +0.80 3.3
Lepton η
ATLAS_2019_I1759875 13000 13 -1.0 12
CMS_2018_I1703993 13000 7.0 -0.40 6.6
Lepton pT
ATLAS_2019_I1759875 13000 18 -2.0 16
CMS_2018_I1703993 13000 11 +1.0 12
CMS_2021_I1901295 13000 3.8 0 3.8
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 3.5 +0.10 3.6
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.50 +0.020 0.52
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 4.2 -0.20 4.0
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 14 -1.0 13
Dilepton
Δη
CMS_2016_I1430892 8000 0.78 - n/a
CMS_2018_I1703993 13000 8.6 0 8.6
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 10 0 10.0
CMS_2018_I1703993 13000 13 -1.0 12
Dilepton
HT
ATLAS_2019_I1759875 13000 15 -2.0 13
Dilepton
m
ATLAS_2019_I1759875 13000 16 -3.0 13
CMS_2018_I1703993 13000 12 0 12
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 15 0 15
CMS_2018_I1703993 13000 11 -1.7 9.3
Dilepton
y
ATLAS_2019_I1759875 13000 12 -2.0 10.0*
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 1.8 -0.50 1.3
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 6.7 +0.50 7.2
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 4.6 -2.2 2.4
CMS_2018_I1703993 13000 11 -1.1 9.9
sumpt
ATLAS_2022_I2152933 13000 2.5 -0.40 2.1
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 3.3 +0.10 3.4
ATLAS_2020_I1801434 13000 2.8 -0.80 2.0
ATLAS_2022_I2077575 13000 4.8* -2.8 2.0*
Top pT
ATLAS_2019_I1750330 13000 2.8* +0.20 3.0*
ATLAS_2020_I1801434 13000 2.4 -0.20 2.2
ATLAS_2022_I2037744 13000 2.3* -1.3 1.00
ATLAS_2022_I2077575 13000 2.2* -0.80 1.4*
CMS_2018_I1703993 13000 20 -1.0 19
CMS_2021_I1901295 13000 7.3* +1.0 8.3*
top.pt.ttbarRF
CMS_2018_I1703993 13000 20 -1.0 19
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 3.1 -1.2 1.9
Top rapidity
ATLAS_2019_I1750330 13000 3.3 +0.30 3.6
ATLAS_2020_I1801434 13000 3.4 -1.8 1.6
ATLAS_2022_I2037744 13000 1.4* -0.99 0.41*
ATLAS_2022_I2077575 13000 2.6 -0.80 1.8*
CMS_2018_I1703993 13000 18 -1.0 17
CMS_2021_I1901295 13000 6.7 +0.30 7.0
topej.dphi
ATLAS_2022_I2037744 13000 2.2 -0.10 2.1
topej.m
ATLAS_2022_I2037744 13000 1.2 -0.32 0.88
χ(ttbar)
ATLAS_2019_I1750330 13000 3.7 +0.60 4.3
ATLAS_2020_I1801434 13000 2.4 +0.20 2.6
ATLAS_2022_I2077575 13000 2.4 +1.5 3.9*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 3.4 -0.10 3.3
ATLAS_2020_I1801434 13000 4.6 -2.2 2.4
ATLAS_2022_I2037744 13000 2.6 -2.2 0.38
ATLAS_2022_I2077575 13000 3.3 -1.9 1.4
CMS_2018_I1703993 13000 34 -7.0 27
CMS_2021_I1901295 13000 11 0 11
Δy (ttbar)
CMS_2016_I1430892 8000 0.72 - n/a
CMS_2018_I1703993 13000 20 0 20
CMS_2021_I1901295 13000 6.5 +1.6 8.1
ttbar HT
ATLAS_2019_I1750330 13000 2.8 +0.30 3.1
ATLAS_2020_I1801434 13000 2.1 -0.20 1.9
ATLAS_2022_I2037744 13000 2.0 -1.2 0.83
ATLAS_2022_I2077575 13000 4.3* -1.9 2.4*
CMS_2021_I1901295 13000 7.2 -0.30 6.9
m(ttbar)
ATLAS_2019_I1750330 13000 2.5* +0.30 2.8*
ATLAS_2020_I1801434 13000 4.2 -1.3 2.9
ATLAS_2022_I2037744 13000 n/a - 0.58
ATLAS_2022_I2077575 13000 2.2* -0.50 1.7*
CMS_2018_I1703993 13000 28 +1.0 29
CMS_2021_I1901295 13000 9.3* +2.7 12*
Pcrossttbar
ATLAS_2020_I1801434 13000 2.7 -1.1 1.6
ttbar pT
ATLAS_2019_I1750330 13000 3.4 +0.20 3.6*
ATLAS_2020_I1801434 13000 2.9 -0.60 2.3
ATLAS_2022_I2037744 13000 0.85 +0.15 1.0
ATLAS_2022_I2077575 13000 2.3* -0.70 1.6*
CMS_2018_I1703993 13000 21 -2.0 19
CMS_2021_I1901295 13000 7.5* +1.1 8.6*
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 2.6 +0.50 3.1
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.7 +2.3 5.0*
CMS_2021_I1901295 13000 9.9 +1.1 11
Ttbar rapidity
ATLAS_2019_I1750330 13000 2.9 +0.40 3.3
ATLAS_2020_I1801434 13000 1.8 +0.100 1.9
ATLAS_2022_I2037744 13000 0.91 -0.31 0.60
ATLAS_2022_I2077575 13000 2.8 0 2.8*
CMS_2018_I1703993 13000 16 -1.0 15
CMS_2021_I1901295 13000 8.3 +0.60 8.9
Mean rapidity
ATLAS_2019_I1750330 13000 4.4 +0.20 4.6
ATLAS_2020_I1801434 13000 2.3 -0.30 2.0
ATLAS_2022_I2077575 13000 4.5* -1.8 2.7*
ttbarej.ht
ATLAS_2022_I2037744 13000 1.7 +0.40 2.1
ttbarej.m
CMS_2021_I1901295 13000 7.3 +0.10 7.4
pT ratio
W to b
ATLAS_2020_I1801434 13000 2.5 -0.20 2.3
pT ratio
W to top
ATLAS_2020_I1801434 13000 2.8 -0.60 2.2
Cross sections
ATLAS_2022_I2037744 13000 0.59 -0.59 0.0036
ATLAS_2022_I2077575 13000 20 -12 8.0
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.