Generator / tune

Details for Pythia 6.427 p0 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 2.7 -1.0 1.7
B jet
η
CMS_2018_I1703993 13000 50 +2.0 52
B jet
pT
CMS_2018_I1703993 13000 58 +2.0 60
bjbj.m
CMS_2018_I1703993 13000 69 +3.0 72
bjbj.pt
CMS_2018_I1703993 13000 62 +5.0 67
bjt.dphi
ATLAS_2022_I2037744 13000 3.3 -0.20 3.1
ej.pt
ATLAS_2022_I2037744 13000 2.9 -0.20 2.7*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 3.5 -0.70 2.8
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 3.4 -0.30 3.1
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 2.8 +1.0 3.8
ΔR(extra jets)
ATLAS_2020_I1801434 13000 2.3 +0.10 2.4
ejej.dphi
ATLAS_2022_I2037744 13000 0.94 +1.2 2.1
ejets.ht
CMS_2021_I1901295 13000 20 -2.0 18
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 3.5 -0.60 2.9
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 3.0 -0.40 2.6
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.078 +0.45 0.53
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.031 +0.27 0.30
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.4 -0.58 0.82
Jet pT
ATLAS_2014_I1304688 7000 18 0 18
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 1.5 +0.10 1.6
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.22 +0.010 0.23
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.6 +0.20 1.8
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.0 +0.10 1.1
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.7 0 1.7
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.5 +0.40 2.9
Lepton η
ATLAS_2019_I1759875 13000 36 +4.0 40
CMS_2018_I1703993 13000 31 +2.0 33
Lepton pT
ATLAS_2019_I1759875 13000 49 +4.0 53
CMS_2018_I1703993 13000 57 +2.0 59
CMS_2021_I1901295 13000 16 -1.0 15
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 2.2 -0.10 2.1
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.29 -0.030 0.26
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 3.2 -0.10 3.1
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 41 +4.0 45
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 43 +3.0 46
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 26 +1.0 27
CMS_2018_I1703993 13000 50 +10 60
Dilepton
HT
ATLAS_2019_I1759875 13000 41 +3.0 44
Dilepton
m
ATLAS_2019_I1759875 13000 42 0 42
CMS_2018_I1703993 13000 51 +5.0 56
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 40 +3.0 43
CMS_2018_I1703993 13000 47 +3.0 50
Dilepton
y
ATLAS_2019_I1759875 13000 32* +4.0 36*
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 6.7 -3.1 3.6
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 26 -4.0 22
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.1 +2.1 8.2
CMS_2018_I1703993 13000 47 +3.0 50
sumpt
ATLAS_2022_I2152933 13000 9.5 -3.5 6.0
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 8.5 +0.20 8.7
ATLAS_2020_I1801434 13000 4.4* +1.3 5.7*
ATLAS_2022_I2077575 13000 1.4 +0.30 1.7*
Top pT
ATLAS_2019_I1750330 13000 7.2* +0.50 7.7
ATLAS_2020_I1801434 13000 4.1* +0.60 4.7
ATLAS_2022_I2037744 13000 1.8 +2.8 4.6
ATLAS_2022_I2077575 13000 1.2* +0.10 1.3*
CMS_2018_I1703993 13000 78 +4.0 82
CMS_2021_I1901295 13000 25* 0 25*
top.pt.ttbarRF
CMS_2018_I1703993 13000 76 +4.0 80
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 4.7 +0.30 5.0
Top rapidity
ATLAS_2019_I1750330 13000 8.6 +0.50 9.1
ATLAS_2020_I1801434 13000 5.0 -0.100 4.9
ATLAS_2022_I2037744 13000 2.0 +1.6 3.6*
ATLAS_2022_I2077575 13000 1.3 +0.50 1.8*
CMS_2018_I1703993 13000 71 +4.0 75
CMS_2021_I1901295 13000 26 0 26
topej.dphi
ATLAS_2022_I2037744 13000 2.6 +0.60 3.2
topej.m
ATLAS_2022_I2037744 13000 1.9 +0.50 2.4
χ(ttbar)
ATLAS_2019_I1750330 13000 8.9 +0.70 9.6
ATLAS_2020_I1801434 13000 4.8 +0.30 5.1
ATLAS_2022_I2077575 13000 1.9* +0.40 2.3*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 7.8 0 7.8
ATLAS_2020_I1801434 13000 4.9 +2.6 7.5
ATLAS_2022_I2037744 13000 2.7 +1.9 4.6
ATLAS_2022_I2077575 13000 1.8 +0.40 2.2
CMS_2018_I1703993 13000 110 0 110
CMS_2021_I1901295 13000 39 -4.0 35
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 77 +7.0 84
CMS_2021_I1901295 13000 27 +3.0 30
ttbar HT
ATLAS_2019_I1750330 13000 6.8 +0.30 7.1
ATLAS_2020_I1801434 13000 4.0 -0.30 3.7
ATLAS_2022_I2037744 13000 1.6 +2.4 4.0
ATLAS_2022_I2077575 13000 1.5 -0.20 1.3*
CMS_2021_I1901295 13000 26 - n/a
m(ttbar)
ATLAS_2019_I1750330 13000 7.2* -0.50 6.7*
ATLAS_2020_I1801434 13000 3.9 +0.70 4.6
ATLAS_2022_I2037744 13000 2.6 - n/a
ATLAS_2022_I2077575 13000 1.1* +0.40 1.5*
CMS_2018_I1703993 13000 89 +5.0 94
CMS_2021_I1901295 13000 31 +4.0 35*
Pcrossttbar
ATLAS_2020_I1801434 13000 4.0 +0.90 4.9
ttbar pT
ATLAS_2019_I1750330 13000 7.9 +0.100 8.0
ATLAS_2020_I1801434 13000 3.7* +1.1 4.8*
ATLAS_2022_I2037744 13000 1.8 +2.7 4.5
ATLAS_2022_I2077575 13000 1.5* 0 1.5*
CMS_2018_I1703993 13000 65 +10 75
CMS_2021_I1901295 13000 24 -4.0 20
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 3.1 +0.30 3.4
ttbar.thetaStar
ATLAS_2022_I2077575 13000 1.6 +0.40 2.0
CMS_2021_I1901295 13000 34 +2.0 36
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.9 +0.20 8.1
ATLAS_2020_I1801434 13000 3.1 +1.1 4.2
ATLAS_2022_I2037744 13000 1.9 +2.0 3.9
ATLAS_2022_I2077575 13000 2.3* -0.20 2.1*
CMS_2018_I1703993 13000 68 +1.0 69
CMS_2021_I1901295 13000 31 +1.0 32
Mean rapidity
ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 3.6 -0.30 3.3
ATLAS_2022_I2077575 13000 2.1* 0 2.1*
ttbarej.ht
ATLAS_2022_I2037744 13000 1.8 +3.8 5.6
ttbarej.m
CMS_2021_I1901295 13000 26 -3.0 23
pT ratio
W to b
ATLAS_2020_I1801434 13000 5.7 -1.2 4.5
pT ratio
W to top
ATLAS_2020_I1801434 13000 4.4 +0.100 4.5
Cross sections
ATLAS_2022_I2037744 13000 12 +15 27
ATLAS_2022_I2077575 13000 4.2 +1.2 5.4
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.