Generator / tune

Details for Pythia 6.426 p2010 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 0.48 - n/a
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 3.3 - n/a
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 1.2 - n/a
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 3.0 - n/a
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 1.4 - n/a
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 0.91 - n/a
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 0.61 +0.89 1.5
B jet
η
CMS_2018_I1703993 13000 56 -2.0 54
B jet
pT
CMS_2018_I1703993 13000 67 -7.0 60
bjbj.m
CMS_2018_I1703993 13000 82 -7.0 75
bjbj.pt
CMS_2018_I1703993 13000 73 -10 63
bjt.dphi
ATLAS_2022_I2037744 13000 1.2 +0.80 2.0
ej.pt
ATLAS_2022_I2037744 13000 2.7 +0.30 3.0*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 3.8 +0.20 4.0
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 4.8 -0.40 4.4
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 4.5 -0.20 4.3
ΔR(extra jets)
ATLAS_2020_I1801434 13000 2.8 +0.60 3.4
ejej.dphi
ATLAS_2022_I2037744 13000 0.59 +2.5 3.1
ejets.ht
CMS_2021_I1901295 13000 20 -3.0 17
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 5.4 -0.50 4.9
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 4.9 -1.5 3.4
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.77 -0.15 0.62
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.43 -0.070 0.36
Jet mass
Jet mass
CMS_2017_I1518399 8000 0.78 - n/a
CMS_2019_I1764472 13000 1.2 -0.61 0.59
Jet pT
ATLAS_2014_I1304688 7000 18 +1.0 19
ATLAS_2019_I1718132 13000 20* - n/a
Dijet
Δη
ATLAS_2019_I1718132 13000 32* - n/a
Dijet
Δφ
ATLAS_2019_I1718132 13000 24 - n/a
Dijet
HT
ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
Dijet mass
ATLAS_2019_I1718132 13000 32 - n/a
Jet Shapes
Differential Jet Shape
ATLAS_2013_I1243871 7000 2.1 +0.10 2.2
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.37 -0.010 0.36
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.8 -0.10 1.7
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.00 0 1.0
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 2.0 0 2.0
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.7 -0.10 2.6
Lepton η
ATLAS_2019_I1759875 13000 42 -4.0 38
CMS_2018_I1703993 13000 36 -3.0 33
Lepton pT
ATLAS_2019_I1759875 13000 57 -6.0 51
CMS_2018_I1703993 13000 67 -7.0 60
CMS_2021_I1901295 13000 14 +2.0 16
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 3.5 +0.10 3.6
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.50 -0.030 0.47
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 5.0 +0.20 5.2
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 36* - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 49 -6.0 43
Dilepton
Δη
CMS_2016_I1430892 8000 0.31 - n/a
CMS_2018_I1703993 13000 51 -8.0 43
Dilepton
Δφ
ATLAS_2019_I1718132 13000 35* - n/a
ATLAS_2019_I1759875 13000 29 +1.0 30*
CMS_2018_I1703993 13000 59 -6.0 53
Dilepton
HT
ATLAS_2019_I1759875 13000 46 -4.0 42
Dilepton
m
ATLAS_2019_I1759875 13000 44 -4.0 40
CMS_2018_I1703993 13000 60 -5.0 55
Dilepton
pT
ATLAS_2019_I1718132 13000 20 - n/a
ATLAS_2019_I1759875 13000 47 -5.0 42
CMS_2018_I1703993 13000 56 -4.0 52
Dilepton
y
ATLAS_2019_I1759875 13000 34 -4.0 30
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 1.5 -0.54 0.96
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 22 0 22
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.3 -0.20 7.1
CMS_2018_I1703993 13000 53 -4.0 49
sumpt
ATLAS_2022_I2152933 13000 4.4 -2.8 1.6
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 7.8 +0.50 8.3
ATLAS_2020_I1801434 13000 4.9 +0.50 5.4
ATLAS_2022_I2077575 13000 2.3* +0.80 3.1*
Top pT
ATLAS_2019_I1750330 13000 6.1* +0.50 6.6
ATLAS_2020_I1801434 13000 4.6 -0.20 4.4
ATLAS_2022_I2037744 13000 0.91 +0.69 1.6
ATLAS_2022_I2077575 13000 1.3* 0 1.3*
CMS_2018_I1703993 13000 87 -7.0 80
CMS_2021_I1901295 13000 25* -2.0 23*
top.pt.ttbarRF
CMS_2018_I1703993 13000 85 -7.0 78
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 6.8 -0.90 5.9
Top rapidity
ATLAS_2019_I1750330 13000 7.7 +0.40 8.1
ATLAS_2020_I1801434 13000 6.6 -0.60 6.0
ATLAS_2022_I2037744 13000 1.4* +0.70 2.1
ATLAS_2022_I2077575 13000 1.5* +0.20 1.7*
CMS_2018_I1703993 13000 81 -6.0 75
CMS_2021_I1901295 13000 24 +1.0 25
topej.dphi
ATLAS_2022_I2037744 13000 2.2 +0.40 2.6
topej.m
ATLAS_2022_I2037744 13000 2.2 +2.2 4.4
χ(ttbar)
ATLAS_2019_I1750330 13000 8.3 +0.50 8.8
ATLAS_2020_I1801434 13000 6.2 -0.90 5.3
ATLAS_2022_I2077575 13000 2.6* -0.60 2.0
Δφ(ttbar)
ATLAS_2019_I1750330 13000 8.2 -0.70 7.5
ATLAS_2020_I1801434 13000 5.8 +0.70 6.5
ATLAS_2022_I2037744 13000 1.6 +1.4 3.0
ATLAS_2022_I2077575 13000 1.8 +0.60 2.4
CMS_2018_I1703993 13000 120 -10 110
CMS_2021_I1901295 13000 36 -1.0 35
Δy (ttbar)
CMS_2016_I1430892 8000 0.88 - n/a
CMS_2018_I1703993 13000 89 -8.0 81
CMS_2021_I1901295 13000 25 0 25
ttbar HT
ATLAS_2019_I1750330 13000 6.2 +0.30 6.5
ATLAS_2020_I1801434 13000 5.9 -0.90 5.0
ATLAS_2022_I2037744 13000 0.70 +0.90 1.6
ATLAS_2022_I2077575 13000 1.3 +0.100 1.4
CMS_2021_I1901295 13000 n/a - 24
m(ttbar)
ATLAS_2019_I1750330 13000 5.3 +0.10 5.4
ATLAS_2020_I1801434 13000 5.5 -0.50 5.0
ATLAS_2022_I2037744 13000 1.2 +1.9 3.1
ATLAS_2022_I2077575 13000 1.5* 0 1.5*
CMS_2018_I1703993 13000 90 -2.0 88
CMS_2021_I1901295 13000 29* +1.0 30
Pcrossttbar
ATLAS_2020_I1801434 13000 5.4 +0.100 5.5
ttbar pT
ATLAS_2019_I1750330 13000 7.2 +0.30 7.5
ATLAS_2020_I1801434 13000 5.9* -1.0 4.9*
ATLAS_2022_I2037744 13000 1.0 +0.70 1.7
ATLAS_2022_I2077575 13000 1.4* +1.2 2.6*
CMS_2018_I1703993 13000 81 -9.0 72
CMS_2021_I1901295 13000 20* +1.0 21
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 7.2 -1.1 6.1
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.1* -0.20 1.9
CMS_2021_I1901295 13000 32 +1.0 33
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.1 +0.40 7.5
ATLAS_2020_I1801434 13000 5.5 -1.8 3.7*
ATLAS_2022_I2037744 13000 0.69 +1.4 2.1
ATLAS_2022_I2077575 13000 2.2 -0.10 2.1*
CMS_2018_I1703993 13000 73 -4.0 69
CMS_2021_I1901295 13000 29 0 29
Mean rapidity
ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 5.6 -0.80 4.8
ATLAS_2022_I2077575 13000 2.2 0 2.2*
ttbarej.ht
ATLAS_2022_I2037744 13000 0.75 +1.7 2.4
ttbarej.m
CMS_2021_I1901295 13000 24 - n/a
pT ratio
W to b
ATLAS_2020_I1801434 13000 6.9 -1.4 5.5
pT ratio
W to top
ATLAS_2020_I1801434 13000 6.4 -1.3 5.1
Cross sections
ATLAS_2022_I2037744 13000 3.8 +6.2 10
ATLAS_2022_I2077575 13000 6.1 +0.50 6.6
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.