Generator / tune

Details for Pythia 6.427 376 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 0.60 - n/a
B jet
 η
 CMS_2018_I1703993 13000 46 -9.0 37
B jet
 pT
 CMS_2018_I1703993 13000 54 -11 43
bjbj.m
 CMS_2018_I1703993 13000 63 -11 52
bjbj.pt
 CMS_2018_I1703993 13000 55 -8.0 47
bjt.dphi
 ATLAS_2022_I2037744 13000 2.2 +0.100 2.3
ej.pt
 ATLAS_2022_I2037744 13000 2.6* +0.80 3.4*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.0 -0.90 2.1
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.3 -0.80 2.5
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.4 -0.80 2.6
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.3 -0.40 1.9
ejej.dphi
 ATLAS_2022_I2037744 13000 1.1 -0.10 1.0
ejets.ht
 CMS_2021_I1901295 13000 15 -1.0 14
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.8 -0.50 3.3
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.5 -0.50 3.0
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.36 +0.26 0.62
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.17 +0.17 0.34
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.3 -0.33 0.97
Jet pT
 ATLAS_2014_I1304688 7000 17 -1.0 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 1.6 +0.20 1.8
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.24 +0.030 0.27
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.7 -0.100 1.6
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.0 +0.10 1.1
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.9 0 1.9
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.1 +0.20 3.3
Lepton η
 ATLAS_2019_I1759875 13000 31 0 31
CMS_2018_I1703993 13000 28 -4.0 24
Lepton pT
 ATLAS_2019_I1759875 13000 41 +1.0 42
CMS_2018_I1703993 13000 51 -8.0 43
CMS_2021_I1901295 13000 12 0 12
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 4.8 +0.50 5.3
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.1 -0.10 1.0
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 6.5 0 6.5
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 34 +3.0 37
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 40 -7.0 33
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 25* -1.0 24*
CMS_2018_I1703993 13000 46 -6.0 40
Dilepton
 HT
 ATLAS_2019_I1759875 13000 34 +1.0 35
Dilepton
 m
 ATLAS_2019_I1759875 13000 34 -1.0 33
CMS_2018_I1703993 13000 46 -7.0 39
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 36 -1.0 35
CMS_2018_I1703993 13000 43 -7.0 36
Dilepton
 y
 ATLAS_2019_I1759875 13000 27* -2.0 25
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 2.0 -0.20 1.8
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 18 0 18
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.7 +1.9 8.6
CMS_2018_I1703993 13000 41 -3.0 38
sumpt
 ATLAS_2022_I2152933 13000 2.3 +0.50 2.8
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.3 +0.10 7.4
ATLAS_2020_I1801434 13000 4.9 +0.60 5.5*
ATLAS_2022_I2077575 13000 1.7 -0.30 1.4
Top pT
 ATLAS_2019_I1750330 13000 6.1* +0.50 6.6*
ATLAS_2020_I1801434 13000 4.9 0 4.9
ATLAS_2022_I2037744 13000 1.5 +2.0 3.5
ATLAS_2022_I2077575 13000 1.6* -0.30 1.3*
CMS_2018_I1703993 13000 70 -8.0 62
CMS_2021_I1901295 13000 20* +1.0 21*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 69 -10 59
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 6.4 -1.7 4.7
Top rapidity
 ATLAS_2019_I1750330 13000 7.3 +0.30 7.6
ATLAS_2020_I1801434 13000 5.4 -0.30 5.1
ATLAS_2022_I2037744 13000 1.6 +1.3 2.9
ATLAS_2022_I2077575 13000 2.1* -1.0 1.1*
CMS_2018_I1703993 13000 62 -5.0 57
CMS_2021_I1901295 13000 20 0 20
topej.dphi
 ATLAS_2022_I2037744 13000 2.4 +0.60 3.0
topej.m
 ATLAS_2022_I2037744 13000 1.2 +1.3 2.5
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.0 +0.70 8.7
ATLAS_2020_I1801434 13000 6.1 -1.5 4.6
ATLAS_2022_I2077575 13000 2.2* -0.40 1.8
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 6.9 -0.30 6.6
ATLAS_2020_I1801434 13000 6.0 +1.7 7.7
ATLAS_2022_I2037744 13000 1.4 +3.7 5.1
ATLAS_2022_I2077575 13000 1.9 -0.20 1.7
CMS_2018_I1703993 13000 92 -9.0 83
CMS_2021_I1901295 13000 30 -2.0 28
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 67 -5.0 62
CMS_2021_I1901295 13000 22 0 22
ttbar HT
 ATLAS_2019_I1750330 13000 5.7 +0.40 6.1
ATLAS_2020_I1801434 13000 4.8 -0.90 3.9
ATLAS_2022_I2037744 13000 1.3 +1.8 3.1
ATLAS_2022_I2077575 13000 1.8* -0.30 1.5*
CMS_2021_I1901295 13000 20 -1.0 19
m(ttbar)
 ATLAS_2019_I1750330 13000 5.5* +1.0 6.5*
ATLAS_2020_I1801434 13000 6.2 -1.6 4.6
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 1.6* 0 1.6*
CMS_2018_I1703993 13000 80 -11 69
CMS_2021_I1901295 13000 28 0 28*
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.5 +0.90 5.4
ttbar pT
 ATLAS_2019_I1750330 13000 7.0 +0.20 7.2
ATLAS_2020_I1801434 13000 4.9 -0.10 4.8*
ATLAS_2022_I2037744 13000 3.8 +0.30 4.1
ATLAS_2022_I2077575 13000 1.7* -0.30 1.4*
CMS_2018_I1703993 13000 60 -1.0 59
CMS_2021_I1901295 13000 19 -1.0 18
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.4 -0.40 5.0
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 1.9 -0.100 1.8
CMS_2021_I1901295 13000 28 +1.0 29
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.5 +0.30 6.8
ATLAS_2020_I1801434 13000 4.4* -1.3 3.1*
ATLAS_2022_I2037744 13000 1.5 +1.7 3.2
ATLAS_2022_I2077575 13000 3.0* -1.4 1.6
CMS_2018_I1703993 13000 56 -2.0 54
CMS_2021_I1901295 13000 25 0 25
Mean rapidity
 ATLAS_2019_I1750330 13000 9.1 -0.20 8.9
ATLAS_2020_I1801434 13000 4.8 -1.3 3.5
ATLAS_2022_I2077575 13000 3.2 -1.3 1.9
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.5 +1.7 4.2
ttbarej.m
 CMS_2021_I1901295 13000 21 -1.0 20
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.5 +0.70 6.2
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.2 +0.100 5.3
Cross sections
 ATLAS_2022_I2037744 13000 8.2 +15 23
ATLAS_2022_I2077575 13000 8.0 -3.0 5.0
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.