Generator / tune

Details for Pythia 6.427 atlas-csc 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 44 -2.0 42
B jet
 pT
 CMS_2018_I1703993 13000 55 -4.0 51
bjbj.m
 CMS_2018_I1703993 13000 65 -7.0 58
bjbj.pt
 CMS_2018_I1703993 13000 58 +6.0 64
bjt.dphi
 ATLAS_2022_I2037744 13000 1.4 -0.30 1.1
ej.pt
 ATLAS_2022_I2037744 13000 2.9 -0.30 2.6
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 4.0 -1.0 3.0
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.7 -1.3 3.4
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.2 -0.70 3.5
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.3 -1.0 2.3
ejej.dphi
 ATLAS_2022_I2037744 13000 0.92 -0.24 0.68
ejets.ht
 CMS_2021_I1901295 13000 13 -3.0 10
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.6 -0.50 4.1
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.5 -0.60 2.9
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.70 -0.17 0.53
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.45 -0.13 0.32
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 n/a - 1.0
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 -0.20 2.5
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.52 -0.040 0.48
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.0 0 2.0
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.5 -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 2.8 -0.20 2.6
Lepton η
 ATLAS_2019_I1759875 13000 36 0 36
CMS_2018_I1703993 13000 26 0 26
Lepton pT
 ATLAS_2019_I1759875 13000 49 -3.0 46
CMS_2018_I1703993 13000 48 +2.0 50
CMS_2021_I1901295 13000 13 0 13
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 3.5 +0.40 3.9
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.1 0 1.1
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 5.7 +0.70 6.4
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 40 -2.0 38
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 36 0 36
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 24 -1.0 23
CMS_2018_I1703993 13000 40 +4.0 44
Dilepton
 HT
 ATLAS_2019_I1759875 13000 41 -3.0 38
Dilepton
 m
 ATLAS_2019_I1759875 13000 36 0 36
CMS_2018_I1703993 13000 43 +2.0 45
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 40 -3.0 37
CMS_2018_I1703993 13000 40 -1.0 39
Dilepton
 y
 ATLAS_2019_I1759875 13000 28 -1.0 27
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 3.9 -1.2 2.7
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 27 -6.0 21
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.9 -0.40 6.5
CMS_2018_I1703993 13000 39 +5.0 44
sumpt
 ATLAS_2022_I2152933 13000 20 +12 32
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.8 -0.20 7.6
ATLAS_2020_I1801434 13000 4.6 +0.40 5.0
ATLAS_2022_I2077575 13000 2.0* +1.7 3.7
Top pT
 ATLAS_2019_I1750330 13000 5.7* -0.10 5.6*
ATLAS_2020_I1801434 13000 4.6 -0.90 3.7
ATLAS_2022_I2037744 13000 1.1 -0.10 1.0
ATLAS_2022_I2077575 13000 1.5* 0 1.5*
CMS_2018_I1703993 13000 75 +4.0 79
CMS_2021_I1901295 13000 22* -2.0 20
top.pt.ttbarRF
 CMS_2018_I1703993 13000 73 -3.0 70
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 4.8 +0.30 5.1
Top rapidity
 ATLAS_2019_I1750330 13000 7.3 0 7.3
ATLAS_2020_I1801434 13000 4.7 0 4.7
ATLAS_2022_I2037744 13000 1.1 +0.100 1.2
ATLAS_2022_I2077575 13000 1.6* +0.100 1.7*
CMS_2018_I1703993 13000 65 +3.0 68
CMS_2021_I1901295 13000 24 -2.0 22
topej.dphi
 ATLAS_2022_I2037744 13000 2.6 -0.50 2.1
topej.m
 ATLAS_2022_I2037744 13000 1.4 -1.1 0.33
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.1 0 8.1
ATLAS_2020_I1801434 13000 5.2 -0.60 4.6
ATLAS_2022_I2077575 13000 2.3* -0.80 1.5*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 6.7 -0.50 6.2
ATLAS_2020_I1801434 13000 5.1 -0.100 5.0
ATLAS_2022_I2037744 13000 2.1 +0.20 2.3
ATLAS_2022_I2077575 13000 1.3 +2.1 3.4
CMS_2018_I1703993 13000 92 +3.0 95
CMS_2021_I1901295 13000 31 -4.0 27
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 77 -2.0 75
CMS_2021_I1901295 13000 24 +1.0 25
ttbar HT
 ATLAS_2019_I1750330 13000 6.1 -0.50 5.6
ATLAS_2020_I1801434 13000 3.7 +0.100 3.8
ATLAS_2022_I2037744 13000 2.3 -1.9 0.43
ATLAS_2022_I2077575 13000 1.6 0 1.6*
CMS_2021_I1901295 13000 23 -2.0 21
m(ttbar)
 ATLAS_2019_I1750330 13000 4.9* -0.50 4.4
ATLAS_2020_I1801434 13000 5.0 -1.2 3.8
ATLAS_2022_I2037744 13000 0.91 +0.090 1.00
ATLAS_2022_I2077575 13000 1.6* +0.30 1.9*
CMS_2018_I1703993 13000 85 -5.0 80
CMS_2021_I1901295 13000 28* +1.0 29
Pcrossttbar
 ATLAS_2020_I1801434 13000 5.3 -1.0 4.3
ttbar pT
 ATLAS_2019_I1750330 13000 6.8 -0.30 6.5
ATLAS_2020_I1801434 13000 5.0* -0.80 4.2
ATLAS_2022_I2037744 13000 2.1 +0.60 2.7
ATLAS_2022_I2077575 13000 1.3 +0.50 1.8*
CMS_2018_I1703993 13000 62 +7.0 69
CMS_2021_I1901295 13000 18 -3.0 15
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.2 -0.80 4.4
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.2* -0.20 2.0*
CMS_2021_I1901295 13000 30 0 30
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.6 -0.100 6.5
ATLAS_2020_I1801434 13000 3.3* -0.30 3.0*
ATLAS_2022_I2037744 13000 0.50 +0.41 0.91
ATLAS_2022_I2077575 13000 1.9 0 1.9
CMS_2018_I1703993 13000 60 +1.0 61
CMS_2021_I1901295 13000 27 0 27
Mean rapidity
 ATLAS_2019_I1750330 13000 10 -0.50 9.5
ATLAS_2020_I1801434 13000 3.2 +0.70 3.9
ATLAS_2022_I2077575 13000 1.7 +0.30 2.0
ttbarej.ht
 ATLAS_2022_I2037744 13000 1.3 -0.39 0.91
ttbarej.m
 CMS_2021_I1901295 13000 20 -2.0 18
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.0 +0.40 4.4
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.2 +0.30 4.5
Cross sections
 ATLAS_2022_I2037744 13000 0.10 +1.4 1.5
ATLAS_2022_I2077575 13000 5.2 +3.1 8.3
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.