Generator / tune

Details for Pythia 6.427 378 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 1.8 - n/a
B jet
η
CMS_2018_I1703993 13000 24 -3.0 21
B jet
pT
CMS_2018_I1703993 13000 29 -3.0 26
bjbj.m
CMS_2018_I1703993 13000 34 -4.0 30
bjbj.pt
CMS_2018_I1703993 13000 31 -4.0 27
bjt.dphi
ATLAS_2022_I2037744 13000 1.7 +0.60 2.3
ej.pt
ATLAS_2022_I2037744 13000 2.5 -0.20 2.3*
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 1.6 -0.93 0.67
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 1.3 -0.10 1.2
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 1.6 +0.30 1.9
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.4 -0.44 0.96
ejej.dphi
ATLAS_2022_I2037744 13000 2.8 -1.6 1.2
ejets.ht
CMS_2021_I1901295 13000 8.2 -2.6 5.6
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 2.6 -0.40 2.2
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 1.4 0 1.4
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.62 -0.43 0.19
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.34 -0.28 0.057
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.69 +1.4 2.1
Jet pT
ATLAS_2014_I1304688 7000 9.1 +0.30 9.4
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 2.6 +0.10 2.7
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.40 +0.080 0.48
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 1.6 +0.30 1.9
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 0.97 +0.13 1.1
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 1.8 +0.30 2.1
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 2.4 +0.70 3.1
Lepton η
ATLAS_2019_I1759875 13000 19 0 19
CMS_2018_I1703993 13000 15 -1.0 14
Lepton pT
ATLAS_2019_I1759875 13000 26 0 26
CMS_2018_I1703993 13000 28 -4.0 24
CMS_2021_I1901295 13000 7.0 0 7.0
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 6.8 -0.80 6.0
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 1.1 +0.100 1.2
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 8.4 -0.80 7.6
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 21 +2.0 23
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 20 0 20
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 15 +3.0 18*
CMS_2018_I1703993 13000 26 -3.0 23
Dilepton
HT
ATLAS_2019_I1759875 13000 21 +2.0 23
Dilepton
m
ATLAS_2019_I1759875 13000 20 +1.0 21
CMS_2018_I1703993 13000 25 -4.0 21
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 21 +1.0 22
CMS_2018_I1703993 13000 23 -1.0 22
Dilepton
y
ATLAS_2019_I1759875 13000 17* -1.0 16
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 3.0 +0.40 3.4
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 11 0 11
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 4.5 -1.3 3.2
CMS_2018_I1703993 13000 25 -2.0 23
sumpt
ATLAS_2022_I2152933 13000 3.8 -0.80 3.0
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 4.8 -0.100 4.7
ATLAS_2020_I1801434 13000 3.3 -0.90 2.4
ATLAS_2022_I2077575 13000 3.7* -0.50 3.2*
Top pT
ATLAS_2019_I1750330 13000 3.8* 0 3.8
ATLAS_2020_I1801434 13000 2.8 -0.90 1.9*
ATLAS_2022_I2037744 13000 0.55 +1.2 1.7
ATLAS_2022_I2077575 13000 2.2* -0.70 1.5*
CMS_2018_I1703993 13000 39 -3.0 36
CMS_2021_I1901295 13000 12 0 12
top.pt.ttbarRF
CMS_2018_I1703993 13000 37 -3.0 34
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 3.2 -0.80 2.4
Top rapidity
ATLAS_2019_I1750330 13000 4.8 -0.100 4.7
ATLAS_2020_I1801434 13000 2.8 -0.60 2.2
ATLAS_2022_I2037744 13000 1.0* -0.25 0.75
ATLAS_2022_I2077575 13000 2.5* -0.80 1.7*
CMS_2018_I1703993 13000 33 -1.0 32
CMS_2021_I1901295 13000 12 0 12*
topej.dphi
ATLAS_2022_I2037744 13000 2.1 +0.50 2.6
topej.m
ATLAS_2022_I2037744 13000 0.88 -0.22 0.66
χ(ttbar)
ATLAS_2019_I1750330 13000 5.8 -0.30 5.5
ATLAS_2020_I1801434 13000 5.8 -3.4 2.4
ATLAS_2022_I2077575 13000 4.3* -1.9 2.4*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 4.7 -0.10 4.6
ATLAS_2020_I1801434 13000 4.8 -1.8 3.0
ATLAS_2022_I2037744 13000 n/a - 3.0
ATLAS_2022_I2077575 13000 2.7 +0.50 3.2
CMS_2018_I1703993 13000 50 -1.0 49
CMS_2021_I1901295 13000 20 -3.0 17
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 36 0 36
CMS_2021_I1901295 13000 11 +1.0 12
ttbar HT
ATLAS_2019_I1750330 13000 3.9 +0.20 4.1
ATLAS_2020_I1801434 13000 1.9 +0.10 2.0
ATLAS_2022_I2037744 13000 0.97 +4.7 5.7
ATLAS_2022_I2077575 13000 3.5* -0.90 2.6*
CMS_2021_I1901295 13000 12 0 12
m(ttbar)
ATLAS_2019_I1750330 13000 3.2 +0.30 3.5*
ATLAS_2020_I1801434 13000 2.8 -0.90 1.9
ATLAS_2022_I2037744 13000 n/a - 1.4
ATLAS_2022_I2077575 13000 2.1* -0.40 1.7*
CMS_2018_I1703993 13000 49 -6.0 43
CMS_2021_I1901295 13000 15 +2.0 17
Pcrossttbar
ATLAS_2020_I1801434 13000 2.6 +0.20 2.8
ttbar pT
ATLAS_2019_I1750330 13000 4.6 0 4.6
ATLAS_2020_I1801434 13000 3.4 -1.1 2.3
ATLAS_2022_I2037744 13000 1.0 +1.0 2.0
ATLAS_2022_I2077575 13000 2.1* 0 2.1*
CMS_2018_I1703993 13000 37 -4.0 33
CMS_2021_I1901295 13000 13 -3.0 10
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 2.3 -0.40 1.9
ttbar.thetaStar
ATLAS_2022_I2077575 13000 3.1 -0.50 2.6*
CMS_2021_I1901295 13000 16 +1.0 17
Ttbar rapidity
ATLAS_2019_I1750330 13000 4.6 -0.20 4.4
ATLAS_2020_I1801434 13000 1.8 -0.30 1.5
ATLAS_2022_I2037744 13000 1.2 +0.60 1.8
ATLAS_2022_I2077575 13000 2.8 -0.40 2.4
CMS_2018_I1703993 13000 33 -3.0 30
CMS_2021_I1901295 13000 14 +1.0 15
Mean rapidity
ATLAS_2019_I1750330 13000 6.4 -0.60 5.8
ATLAS_2020_I1801434 13000 1.9 0 1.9
ATLAS_2022_I2077575 13000 2.5 +0.10 2.6
ttbarej.ht
ATLAS_2022_I2037744 13000 1.5 +2.2 3.7
ttbarej.m
CMS_2021_I1901295 13000 10 +1.0 11
pT ratio
W to b
ATLAS_2020_I1801434 13000 2.4 +0.20 2.6
pT ratio
W to top
ATLAS_2020_I1801434 13000 2.8 -0.70 2.1
Cross sections
ATLAS_2022_I2037744 13000 0.49 +0.25 0.74
ATLAS_2022_I2077575 13000 14 -4.7 9.3
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.