Generator / tune

Details for Pythia 6.426 358 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 n/a - 0.19
B jet
η
CMS_2018_I1703993 13000 37 +7.0 44
B jet
pT
CMS_2018_I1703993 13000 43 +10 53
bjbj.m
CMS_2018_I1703993 13000 51 +12 63
bjbj.pt
CMS_2018_I1703993 13000 45 +12 57
bjt.dphi
ATLAS_2022_I2037744 13000 4.8 -2.9 1.9
ej.pt
ATLAS_2022_I2037744 13000 2.8* +0.20 3.0
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 2.4 +0.80 3.2
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 3.4 -0.40 3.0
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 4.0 -0.40 3.6
ΔR(extra jets)
ATLAS_2020_I1801434 13000 2.1 -0.40 1.7
ejej.dphi
ATLAS_2022_I2037744 13000 1.3 -0.31 0.99
ejets.ht
CMS_2021_I1901295 13000 18 -4.0 14
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 4.0 -0.70 3.3
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 2.7 0 2.7
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.15 +0.39 0.54
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.054 +0.18 0.23
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.79 -0.040 0.75
Jet pT
ATLAS_2014_I1304688 7000 16 0 16
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 2.7 -0.50 2.2
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.45 -0.010 0.44
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.7 -0.20 1.5
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.90 +0.20 1.1
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.8 -0.40 1.4
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.8 -0.50 2.3
Lepton η
ATLAS_2019_I1759875 13000 38 -5.0 33
CMS_2018_I1703993 13000 23 +4.0 27
Lepton pT
ATLAS_2019_I1759875 13000 52 -6.0 46
CMS_2018_I1703993 13000 42 +10 52
CMS_2021_I1901295 13000 16 -4.0 12
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 6.3 -0.20 6.1
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 1.0 +0.20 1.2
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 7.7 -0.50 7.2
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 42 -3.0 39
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 31 +7.0 38
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 24 -1.0 23
CMS_2018_I1703993 13000 39 +8.0 47
Dilepton
HT
ATLAS_2019_I1759875 13000 43 -5.0 38
Dilepton
m
ATLAS_2019_I1759875 13000 42 -7.0 35
CMS_2018_I1703993 13000 39 +11 50
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 42 -5.0 37
CMS_2018_I1703993 13000 36 +7.0 43
Dilepton
y
ATLAS_2019_I1759875 13000 30 -3.0 27
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 0.82 +1.7 2.5
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 21 -1.0 20
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 8.2 +0.40 8.6
CMS_2018_I1703993 13000 35 +5.0 40
sumpt
ATLAS_2022_I2152933 13000 3.4 -1.0 2.4
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 8.2 -1.00 7.2
ATLAS_2020_I1801434 13000 5.6 +0.20 5.8
ATLAS_2022_I2077575 13000 1.5 +1.7 3.2*
Top pT
ATLAS_2019_I1750330 13000 6.7* -0.50 6.2*
ATLAS_2020_I1801434 13000 4.7 0 4.7
ATLAS_2022_I2037744 13000 1.9* +0.70 2.6
ATLAS_2022_I2077575 13000 1.7* -0.100 1.6*
CMS_2018_I1703993 13000 67 +2.0 69
CMS_2021_I1901295 13000 23 -3.0 20
top.pt.ttbarRF
CMS_2018_I1703993 13000 67 +1.0 68
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 5.3 -0.20 5.1
Top rapidity
ATLAS_2019_I1750330 13000 7.8 -0.50 7.3
ATLAS_2020_I1801434 13000 5.6 -1.1 4.5
ATLAS_2022_I2037744 13000 1.7* 0 1.7*
ATLAS_2022_I2077575 13000 2.3* -0.70 1.6*
CMS_2018_I1703993 13000 60 +7.0 67
CMS_2021_I1901295 13000 23 -2.0 21
topej.dphi
ATLAS_2022_I2037744 13000 3.3 -0.40 2.9
topej.m
ATLAS_2022_I2037744 13000 5.2 -3.7 1.5
χ(ttbar)
ATLAS_2019_I1750330 13000 8.3 -0.30 8.0
ATLAS_2020_I1801434 13000 4.6 -0.70 3.9
ATLAS_2022_I2077575 13000 2.5* -0.30 2.2
Δφ(ttbar)
ATLAS_2019_I1750330 13000 7.6 -0.30 7.3
ATLAS_2020_I1801434 13000 6.8 +1.1 7.9
ATLAS_2022_I2037744 13000 n/a - 5.2
ATLAS_2022_I2077575 13000 1.8 +0.100 1.9
CMS_2018_I1703993 13000 92 +5.0 97
CMS_2021_I1901295 13000 34 -4.0 30
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 66 +6.0 72
CMS_2021_I1901295 13000 24 -2.0 22
ttbar HT
ATLAS_2019_I1750330 13000 6.5 -0.60 5.9
ATLAS_2020_I1801434 13000 6.0 -2.2 3.8
ATLAS_2022_I2037744 13000 n/a - 2.2
ATLAS_2022_I2077575 13000 2.8* +0.30 3.1
CMS_2021_I1901295 13000 23 -1.0 22
m(ttbar)
ATLAS_2019_I1750330 13000 5.7* -0.90 4.8*
ATLAS_2020_I1801434 13000 4.5 +0.70 5.2
ATLAS_2022_I2037744 13000 2.0 -0.10 1.9
ATLAS_2022_I2077575 13000 1.5* +0.40 1.9*
CMS_2018_I1703993 13000 73 -1.0 72
CMS_2021_I1901295 13000 29 -3.0 26
Pcrossttbar
ATLAS_2020_I1801434 13000 4.8* +1.5 6.3
ttbar pT
ATLAS_2019_I1750330 13000 7.4 -0.70 6.7
ATLAS_2020_I1801434 13000 5.0 +0.40 5.4
ATLAS_2022_I2037744 13000 2.3 -0.60 1.7
ATLAS_2022_I2077575 13000 1.8* -0.50 1.3*
CMS_2018_I1703993 13000 59 +4.0 63
CMS_2021_I1901295 13000 21 0 21
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 4.8 -0.20 4.6
ttbar.thetaStar
ATLAS_2022_I2077575 13000 2.8* -0.90 1.9*
CMS_2021_I1901295 13000 31 -3.0 28
Ttbar rapidity
ATLAS_2019_I1750330 13000 7.4 -0.70 6.7
ATLAS_2020_I1801434 13000 2.9 +0.10 3.0
ATLAS_2022_I2037744 13000 2.9 -1.3 1.6
ATLAS_2022_I2077575 13000 2.4 -1.0 1.4
CMS_2018_I1703993 13000 55 +6.0 61
CMS_2021_I1901295 13000 28 -3.0 25
Mean rapidity
ATLAS_2019_I1750330 13000 10 -0.20 9.8
ATLAS_2020_I1801434 13000 4.2 -0.70 3.5
ATLAS_2022_I2077575 13000 2.3 -0.100 2.2
ttbarej.ht
ATLAS_2022_I2037744 13000 3.1 -1.0 2.1
ttbarej.m
CMS_2021_I1901295 13000 22 -1.0 21
pT ratio
W to b
ATLAS_2020_I1801434 13000 4.8 -0.20 4.6
pT ratio
W to top
ATLAS_2020_I1801434 13000 5.2 -0.60 4.6
Cross sections
ATLAS_2022_I2037744 13000 12 -2.9 9.1
ATLAS_2022_I2077575 13000 8.8 -2.4 6.4
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.