Generator / tune

Details for Pythia 6.427 364 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 1.4 -1.00 0.40
B jet
η
CMS_2018_I1703993 13000 58 -3.0 55
B jet
pT
CMS_2018_I1703993 13000 70 -7.0 63
bjbj.m
CMS_2018_I1703993 13000 86 -11 75
bjbj.pt
CMS_2018_I1703993 13000 73 -7.0 66
bjt.dphi
ATLAS_2022_I2037744 13000 3.1 -0.70 2.4
ej.pt
ATLAS_2022_I2037744 13000 2.5* +0.60 3.1*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 4.1 -0.80 3.3
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 3.6 +0.60 4.2
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 4.2 0 4.2
ΔR(extra jets)
ATLAS_2020_I1801434 13000 3.8 -1.2 2.6
ejej.dphi
ATLAS_2022_I2037744 13000 1.3 -0.50 0.80
ejets.ht
CMS_2021_I1901295 13000 22 -4.0 18
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 4.0 +1.0 5.0
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 3.2 0 3.2
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.20 +0.080 0.28
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.051 +0.047 0.098
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.0 +0.70 1.7
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 1.3 +0.30 1.6
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.18 +0.050 0.23
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.9 -0.100 1.8
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.1 -0.14 0.96
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 2.0 -0.10 1.9
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.8 -0.20 2.6
Lepton η
ATLAS_2019_I1759875 13000 38 +1.0 39
CMS_2018_I1703993 13000 36 -2.0 34
Lepton pT
ATLAS_2019_I1759875 13000 50 +2.0 52
CMS_2018_I1703993 13000 69 -7.0 62
CMS_2021_I1901295 13000 15 +1.0 16
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 2.0 -0.30 1.7
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.21 +0.010 0.22
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 2.8 -0.40 2.4
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 42 +1.0 43
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 50 -2.0 48
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 27 +2.0 29*
CMS_2018_I1703993 13000 63 -7.0 56
Dilepton
HT
ATLAS_2019_I1759875 13000 41 +2.0 43
Dilepton
m
ATLAS_2019_I1759875 13000 41 -1.0 40
CMS_2018_I1703993 13000 61 -5.0 56
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 42 0 42
CMS_2018_I1703993 13000 62 -11 51
Dilepton
y
ATLAS_2019_I1759875 13000 35* -4.0 31
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 19 +2.0 21
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 6.3 +2.3 8.6
CMS_2018_I1703993 13000 56 -8.0 48
sumpt
ATLAS_2022_I2152933 13000 18 +8.0 26
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 8.6 0 8.6
ATLAS_2020_I1801434 13000 4.8 +0.80 5.6
ATLAS_2022_I2077575 13000 2.7* -1.1 1.6
Top pT
ATLAS_2019_I1750330 13000 6.7 +0.80 7.5*
ATLAS_2020_I1801434 13000 3.9 +1.1 5.0
ATLAS_2022_I2037744 13000 1.5* +1.0 2.5*
ATLAS_2022_I2077575 13000 1.6* 0 1.6*
CMS_2018_I1703993 13000 83 0 83
CMS_2021_I1901295 13000 26* 0 26*
top.pt.ttbarRF
CMS_2018_I1703993 13000 83 -1.0 82
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 5.5 +0.50 6.0
Top rapidity
ATLAS_2019_I1750330 13000 8.4 +1.1 9.5
ATLAS_2020_I1801434 13000 5.2 +1.1 6.3
ATLAS_2022_I2037744 13000 3.0 -0.10 2.9
ATLAS_2022_I2077575 13000 1.6* 0 1.6*
CMS_2018_I1703993 13000 77 0 77
CMS_2021_I1901295 13000 26 0 26
topej.dphi
ATLAS_2022_I2037744 13000 2.5 +0.40 2.9
topej.m
ATLAS_2022_I2037744 13000 0.89 +0.090 0.98
χ(ttbar)
ATLAS_2019_I1750330 13000 8.9 +0.40 9.3
ATLAS_2020_I1801434 13000 5.6 +0.30 5.9
ATLAS_2022_I2077575 13000 2.7* -1.0 1.7*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 8.2 -0.70 7.5
ATLAS_2020_I1801434 13000 5.2 +1.9 7.1
ATLAS_2022_I2037744 13000 1.5 +1.7 3.2
ATLAS_2022_I2077575 13000 3.0 -1.7 1.3
CMS_2018_I1703993 13000 120 0 120
CMS_2021_I1901295 13000 37 -2.0 35
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 82 +6.0 88
CMS_2021_I1901295 13000 26 +2.0 28
ttbar HT
ATLAS_2019_I1750330 13000 6.8 +0.20 7.0
ATLAS_2020_I1801434 13000 4.1 +1.2 5.3
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 1.8 -0.60 1.2*
CMS_2021_I1901295 13000 25 0 25
m(ttbar)
ATLAS_2019_I1750330 13000 5.8* +0.90 6.7
ATLAS_2020_I1801434 13000 4.2 +1.4 5.6
ATLAS_2022_I2037744 13000 1.4 +0.80 2.2
ATLAS_2022_I2077575 13000 1.9* -0.40 1.5*
CMS_2018_I1703993 13000 90 -2.0 88
CMS_2021_I1901295 13000 31 +4.0 35
Pcrossttbar
ATLAS_2020_I1801434 13000 5.2 +0.40 5.6
ttbar pT
ATLAS_2019_I1750330 13000 7.7 +0.40 8.1
ATLAS_2020_I1801434 13000 4.2 +1.3 5.5
ATLAS_2022_I2037744 13000 1.3 +1.6 2.9
ATLAS_2022_I2077575 13000 1.9* -0.100 1.8*
CMS_2018_I1703993 13000 72 +2.0 74
CMS_2021_I1901295 13000 23 -1.0 22*
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 5.3 +1.0 6.3
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.4 -0.80 1.6
CMS_2021_I1901295 13000 35 +2.0 37
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.7 +0.50 8.2
ATLAS_2020_I1801434 13000 3.6 +0.20 3.8*
ATLAS_2022_I2037744 13000 1.9 +0.70 2.6
ATLAS_2022_I2077575 13000 1.7 -0.100 1.6*
CMS_2018_I1703993 13000 71 -1.0 70
CMS_2021_I1901295 13000 30 +2.0 32
Mean rapidity
ATLAS_2019_I1750330 13000 11 0 11
ATLAS_2020_I1801434 13000 3.7 +0.80 4.5
ATLAS_2022_I2077575 13000 2.0 -0.80 1.2*
ttbarej.ht
ATLAS_2022_I2037744 13000 3.7 +0.100 3.8
ttbarej.m
CMS_2021_I1901295 13000 25 -1.0 24
pT ratio
W to b
ATLAS_2020_I1801434 13000 4.4 +0.90 5.3
pT ratio
W to top
ATLAS_2020_I1801434 13000 4.7 +0.90 5.6
Cross sections
ATLAS_2022_I2037744 13000 10.0 +7.0 17
ATLAS_2022_I2077575 13000 8.1 -3.6 4.5
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.