Generator / tune

Details for Pythia 6.427 357 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 n/a - 2.2
B jet
 η
 CMS_2018_I1703993 13000 46 -2.0 44
B jet
 pT
 CMS_2018_I1703993 13000 58 -8.0 50
bjbj.m
 CMS_2018_I1703993 13000 76 -9.0 67
bjbj.pt
 CMS_2018_I1703993 13000 62 -9.0 53
bjt.dphi
 ATLAS_2022_I2037744 13000 2.1 +1.5 3.6
ej.pt
 ATLAS_2022_I2037744 13000 2.8* -0.30 2.5
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.0 +1.5 4.5
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.6 -0.80 2.8
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.2 -0.50 2.7
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.8 -0.30 2.5
ejej.dphi
 ATLAS_2022_I2037744 13000 1.7 +1.1 2.8
ejets.ht
 CMS_2021_I1901295 13000 16 -5.0 11
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.7 +0.30 4.0
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.7 +0.20 2.9
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.25 +0.32 0.57
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.15 +0.040 0.19
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.54 +0.46 1.0
Jet pT
 ATLAS_2014_I1304688 7000 16 +1.0 17
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 +0.20 2.6
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.39 +0.050 0.44
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.5 +0.10 1.6
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.90 +0.30 1.2
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.7 0 1.7
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.4 0 2.4
Lepton η
 ATLAS_2019_I1759875 13000 35 0 35
CMS_2018_I1703993 13000 29 -2.0 27
Lepton pT
 ATLAS_2019_I1759875 13000 49 -2.0 47
CMS_2018_I1703993 13000 53 -5.0 48
CMS_2021_I1901295 13000 12 0 12
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.1 -0.100 6.0
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.97 +0.13 1.1
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.6 +0.20 7.8
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 40 0 40
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 39 -3.0 36
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 25 -2.0 23
CMS_2018_I1703993 13000 45 -2.0 43
Dilepton
 HT
 ATLAS_2019_I1759875 13000 39 0 39
Dilepton
 m
 ATLAS_2019_I1759875 13000 36 +1.0 37
CMS_2018_I1703993 13000 48 -4.0 44
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 39 0 39
CMS_2018_I1703993 13000 44 -3.0 41
Dilepton
 y
 ATLAS_2019_I1759875 13000 28 0 28
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 2.4 +1.6 4.0
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 19 0 19
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 5.6 +2.0 7.6
CMS_2018_I1703993 13000 48 -5.0 43
sumpt
 ATLAS_2022_I2152933 13000 3.1 +0.70 3.8
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.2 +0.40 7.6
ATLAS_2020_I1801434 13000 3.8 +1.6 5.4
ATLAS_2022_I2077575 13000 2.7* -0.70 2.0
Top pT
 ATLAS_2019_I1750330 13000 5.7* +0.90 6.6*
ATLAS_2020_I1801434 13000 4.0 +0.20 4.2
ATLAS_2022_I2037744 13000 1.0* +1.7 2.7
ATLAS_2022_I2077575 13000 1.4* +0.20 1.6*
CMS_2018_I1703993 13000 73 -4.0 69
CMS_2021_I1901295 13000 20 0 20*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 72 -4.0 68
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.8 -0.60 5.2
Top rapidity
 ATLAS_2019_I1750330 13000 7.2 +0.40 7.6
ATLAS_2020_I1801434 13000 5.1 -0.30 4.8
ATLAS_2022_I2037744 13000 2.0* +0.10 2.1
ATLAS_2022_I2077575 13000 1.9* +0.10 2.0*
CMS_2018_I1703993 13000 69 -3.0 66
CMS_2021_I1901295 13000 20 +2.0 22*
topej.dphi
 ATLAS_2022_I2037744 13000 2.8 -0.20 2.6
topej.m
 ATLAS_2022_I2037744 13000 1.3 -0.20 1.1
χ(ttbar)
 ATLAS_2019_I1750330 13000 7.6 +0.80 8.4
ATLAS_2020_I1801434 13000 4.7 -0.20 4.5
ATLAS_2022_I2077575 13000 1.9 +1.0 2.9*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 6.7 +0.40 7.1
ATLAS_2020_I1801434 13000 5.0 +1.8 6.8
ATLAS_2022_I2037744 13000 n/a - 3.2
ATLAS_2022_I2077575 13000 1.5 +0.80 2.3
CMS_2018_I1703993 13000 110 -10 100
CMS_2021_I1901295 13000 31 -2.0 29
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 76 -4.0 72
CMS_2021_I1901295 13000 21 +1.0 22
ttbar HT
 ATLAS_2019_I1750330 13000 5.8 +0.40 6.2
ATLAS_2020_I1801434 13000 4.0 0 4.0
ATLAS_2022_I2037744 13000 1.5 +0.50 2.0
ATLAS_2022_I2077575 13000 1.6 +0.60 2.2*
CMS_2021_I1901295 13000 21 -1.0 20
m(ttbar)
 ATLAS_2019_I1750330 13000 4.9* +1.5 6.4*
ATLAS_2020_I1801434 13000 3.8 +0.10 3.9
ATLAS_2022_I2037744 13000 n/a - 2.4
ATLAS_2022_I2077575 13000 1.6* +0.20 1.8*
CMS_2018_I1703993 13000 80 -2.0 78
CMS_2021_I1901295 13000 24 +3.0 27
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.5 +0.50 5.0
ttbar pT
 ATLAS_2019_I1750330 13000 6.6 +0.70 7.3
ATLAS_2020_I1801434 13000 3.8 +0.50 4.3
ATLAS_2022_I2037744 13000 1.8 +1.4 3.2
ATLAS_2022_I2077575 13000 1.6* 0 1.6*
CMS_2018_I1703993 13000 65 +1.0 66
CMS_2021_I1901295 13000 19 -1.0 18
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.4 -0.10 4.3
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.1 +0.60 2.7*
CMS_2021_I1901295 13000 27 +1.0 28
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.6 +0.70 7.3
ATLAS_2020_I1801434 13000 3.3 +1.0 4.3*
ATLAS_2022_I2037744 13000 2.2 +0.30 2.5
ATLAS_2022_I2077575 13000 2.0 +0.50 2.5*
CMS_2018_I1703993 13000 62 -2.0 60
CMS_2021_I1901295 13000 24 +1.0 25
Mean rapidity
 ATLAS_2019_I1750330 13000 9.5 +0.20 9.7
ATLAS_2020_I1801434 13000 3.7 +0.30 4.0
ATLAS_2022_I2077575 13000 2.0 +0.20 2.2*
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.0 +3.4 5.4
ttbarej.m
 CMS_2021_I1901295 13000 20 -1.0 19
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.6 +0.80 5.4
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.2 -0.50 4.7
Cross sections
 ATLAS_2022_I2037744 13000 7.8 +7.2 15
ATLAS_2022_I2077575 13000 7.1 +0.80 7.9
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.