Generator / tune

Details for Pythia 6.427 373 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 0.40 +2.8 3.2
B jet
 η
 CMS_2018_I1703993 13000 24 -4.0 20
B jet
 pT
 CMS_2018_I1703993 13000 28 -4.0 24
bjbj.m
 CMS_2018_I1703993 13000 34 -7.0 27
bjbj.pt
 CMS_2018_I1703993 13000 31 -6.0 25
bjt.dphi
 ATLAS_2022_I2037744 13000 1.3 0 1.3
ej.pt
 ATLAS_2022_I2037744 13000 2.2 +0.100 2.3
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.7 -1.5 2.2
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.0 -1.4 2.6
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.4 -1.6 2.8
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.9* -0.70 2.2
ejej.dphi
 ATLAS_2022_I2037744 13000 0.63 +0.060 0.69
ejets.ht
 CMS_2021_I1901295 13000 9.1 -2.5 6.6
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.0 -1.9 2.1
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.6 -1.7 1.9
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.41 -0.090 0.32
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.11 +0.020 0.13
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.66 +0.44 1.1
Jet pT
 ATLAS_2014_I1304688 7000 11 0 11
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 2.4 0 2.4
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.39 -0.070 0.32
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.5 +0.20 1.7
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.89 +0.31 1.2
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.5 +0.40 1.9
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.6 +0.50 3.1
Lepton η
 ATLAS_2019_I1759875 13000 19 +1.0 20
CMS_2018_I1703993 13000 14 -1.0 13
Lepton pT
 ATLAS_2019_I1759875 13000 25 +2.0 27
CMS_2018_I1703993 13000 26 -3.0 23
CMS_2021_I1901295 13000 5.9 +0.30 6.2
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 4.8 +0.40 5.2
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.1 0 1.1
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 6.3 -0.20 6.1
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 20 +2.0 22
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 20 -2.0 18
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 14 +4.0 18*
CMS_2018_I1703993 13000 23 -2.0 21
Dilepton
 HT
 ATLAS_2019_I1759875 13000 20 +2.0 22
Dilepton
 m
 ATLAS_2019_I1759875 13000 19 +3.0 22
CMS_2018_I1703993 13000 25 -2.0 23
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 21 +3.0 24
CMS_2018_I1703993 13000 22 -3.0 19
Dilepton
 y
 ATLAS_2019_I1759875 13000 14 +2.0 16
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 3.4 +0.70 4.1
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 10 0 10
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.4 -2.4 4.0
CMS_2018_I1703993 13000 21 -1.0 20
sumpt
 ATLAS_2022_I2152933 13000 2.9 +1.5 4.4
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 4.5 +0.100 4.6
ATLAS_2020_I1801434 13000 5.0 -2.2 2.8
ATLAS_2022_I2077575 13000 3.2* -1.0 2.2*
Top pT
 ATLAS_2019_I1750330 13000 3.6 +0.40 4.0*
ATLAS_2020_I1801434 13000 4.4 -1.6 2.8
ATLAS_2022_I2037744 13000 0.70 +1.3 2.0*
ATLAS_2022_I2077575 13000 1.9* -0.60 1.3*
CMS_2018_I1703993 13000 36 -3.0 33
CMS_2021_I1901295 13000 11* 0 11*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 35 -3.0 32
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.9 -2.8 3.1
Top rapidity
 ATLAS_2019_I1750330 13000 4.3 +0.40 4.7
ATLAS_2020_I1801434 13000 5.2 -1.6 3.6
ATLAS_2022_I2037744 13000 1.0 +0.20 1.2
ATLAS_2022_I2077575 13000 2.0* -0.30 1.7*
CMS_2018_I1703993 13000 33 -3.0 30
CMS_2021_I1901295 13000 11 0 11
topej.dphi
 ATLAS_2022_I2037744 13000 2.1 +0.50 2.6*
topej.m
 ATLAS_2022_I2037744 13000 1.1 +0.20 1.3
χ(ttbar)
 ATLAS_2019_I1750330 13000 5.0 +0.40 5.4
ATLAS_2020_I1801434 13000 6.8 -2.1 4.7
ATLAS_2022_I2077575 13000 3.6* -0.20 3.4*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 4.4 -0.10 4.3
ATLAS_2020_I1801434 13000 5.7 -1.2 4.5
ATLAS_2022_I2037744 13000 0.36 +0.20 0.56
ATLAS_2022_I2077575 13000 2.4 -0.60 1.8
CMS_2018_I1703993 13000 54 -9.0 45
CMS_2021_I1901295 13000 17 -2.0 15
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 37 -3.0 34
CMS_2021_I1901295 13000 11 +2.0 13
ttbar HT
 ATLAS_2019_I1750330 13000 3.7 0 3.7
ATLAS_2020_I1801434 13000 4.4 -1.9 2.5
ATLAS_2022_I2037744 13000 1.2 - n/a
ATLAS_2022_I2077575 13000 3.3* -1.9 1.4
CMS_2021_I1901295 13000 10 +1.0 11
m(ttbar)
 ATLAS_2019_I1750330 13000 3.1* +0.50 3.6
ATLAS_2020_I1801434 13000 5.4 -2.1 3.3
ATLAS_2022_I2037744 13000 0.41 - n/a
ATLAS_2022_I2077575 13000 2.1* -1.0 1.1*
CMS_2018_I1703993 13000 70* -26 44
CMS_2021_I1901295 13000 16 +1.0 17
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.8 -2.1 2.7
ttbar pT
 ATLAS_2019_I1750330 13000 4.1 +0.40 4.5
ATLAS_2020_I1801434 13000 5.5* -3.0 2.5*
ATLAS_2022_I2037744 13000 1.0 +1.9 2.9
ATLAS_2022_I2077575 13000 1.8* -0.40 1.4*
CMS_2018_I1703993 13000 34 -2.0 32
CMS_2021_I1901295 13000 10 +1.0 11
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.4 -2.4 3.0
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.3 +0.50 2.8*
CMS_2021_I1901295 13000 16 +1.0 17
Ttbar rapidity
 ATLAS_2019_I1750330 13000 4.0 +0.100 4.1
ATLAS_2020_I1801434 13000 3.4* -0.30 3.1
ATLAS_2022_I2037744 13000 0.28 +0.49 0.77
ATLAS_2022_I2077575 13000 2.4 -0.60 1.8*
CMS_2018_I1703993 13000 30 -2.0 28
CMS_2021_I1901295 13000 13 +2.0 15
Mean rapidity
 ATLAS_2019_I1750330 13000 5.9 -0.30 5.6
ATLAS_2020_I1801434 13000 4.1 -0.70 3.4
ATLAS_2022_I2077575 13000 4.3* -2.3 2.0*
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.1 -0.80 1.3
ttbarej.m
 CMS_2021_I1901295 13000 11 0 11
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.0 -1.8 3.2
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.6 -2.7 2.9
Cross sections
 ATLAS_2022_I2037744 13000 0.021 +2.2 2.2
ATLAS_2022_I2077575 13000 12 -6.6 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.