Generator / tune

Details for Pythia 6.426 atlas-csc vs. 6.427

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (6.426) Δ χ2+5% (6.427)
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 0.78 +1.0 1.8
B jet
 η
 CMS_2018_I1703993 13000 53 -9.0 44
B jet
 pT
 CMS_2018_I1703993 13000 63 -8.0 55
bjbj.m
 CMS_2018_I1703993 13000 72 -7.0 65
bjbj.pt
 CMS_2018_I1703993 13000 68 -10 58
bjt.dphi
 ATLAS_2022_I2037744 13000 1.9 -0.50 1.4
ej.pt
 ATLAS_2022_I2037744 13000 2.8 +0.10 2.9
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.2 +0.80 4.0
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.0 +0.70 4.7
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.7 +0.50 4.2
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.4* -0.10 3.3
ejej.dphi
 ATLAS_2022_I2037744 13000 0.36 +0.56 0.92
ejets.ht
 CMS_2021_I1901295 13000 13 0 13
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.6 +1.00 4.6
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.8 -0.30 3.5
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.77 -0.070 0.70
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.50 -0.050 0.45
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.94 - n/a
Jet pT
 ATLAS_2014_I1304688 7000 17 -1.0 16
ATLAS_2019_I1718132 13000 7.7* - n/a
Dijet
 Δη
 ATLAS_2019_I1718132 13000 11* - n/a
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 6.4 - n/a
Dijet
 HT
 ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 8.0 - n/a
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 2.3 +0.40 2.7
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.44 +0.080 0.52
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.1 -0.10 2.0
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.4 +0.10 1.5
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.8 -0.10 1.7
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.7 +0.100 2.8
Lepton η
 ATLAS_2019_I1759875 13000 37 -1.0 36
CMS_2018_I1703993 13000 31 -5.0 26
Lepton pT
 ATLAS_2019_I1759875 13000 50 -1.0 49
CMS_2018_I1703993 13000 58 -10 48
CMS_2021_I1901295 13000 14 -1.0 13
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 4.0 -0.50 3.5
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.1 0 1.1
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 5.8 -0.100 5.7
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 7.2 - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 42 -2.0 40
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 41 -5.0 36
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 3.5 - n/a
ATLAS_2019_I1759875 13000 24 0 24
CMS_2018_I1703993 13000 50 -10 40
Dilepton
 HT
 ATLAS_2019_I1759875 13000 41 0 41
Dilepton
 m
 ATLAS_2019_I1759875 13000 39 -3.0 36
CMS_2018_I1703993 13000 54 -11 43
Dilepton
 pT
 ATLAS_2019_I1718132 13000 5.4 - n/a
ATLAS_2019_I1759875 13000 41 -1.0 40
CMS_2018_I1703993 13000 48 -8.0 40
Dilepton
 y
 ATLAS_2019_I1759875 13000 29 -1.0 28
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 0.85 +3.1 3.9
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 23 +4.0 27
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 4.6 +2.3 6.9
CMS_2018_I1703993 13000 49 -10 39
sumpt
 ATLAS_2022_I2152933 13000 16 +4.0 20
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.7 +0.100 7.8
ATLAS_2020_I1801434 13000 3.0 +1.6 4.6
ATLAS_2022_I2077575 13000 1.6 +0.40 2.0*
Top pT
 ATLAS_2019_I1750330 13000 5.9* -0.20 5.7*
ATLAS_2020_I1801434 13000 3.4 +1.2 4.6
ATLAS_2022_I2037744 13000 0.80 +0.30 1.1
ATLAS_2022_I2077575 13000 1.5* 0 1.5*
CMS_2018_I1703993 13000 81 -6.0 75
CMS_2021_I1901295 13000 22* 0 22*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 75 -2.0 73
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 4.1 +0.70 4.8
Top rapidity
 ATLAS_2019_I1750330 13000 7.2 +0.100 7.3
ATLAS_2020_I1801434 13000 4.3 +0.40 4.7
ATLAS_2022_I2037744 13000 0.70 +0.40 1.1
ATLAS_2022_I2077575 13000 2.4* -0.80 1.6*
CMS_2018_I1703993 13000 71 -6.0 65
CMS_2021_I1901295 13000 25* -1.0 24
topej.dphi
 ATLAS_2022_I2037744 13000 2.3 +0.30 2.6
topej.m
 ATLAS_2022_I2037744 13000 0.90 +0.50 1.4
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.2 -0.100 8.1
ATLAS_2020_I1801434 13000 4.9 +0.30 5.2
ATLAS_2022_I2077575 13000 2.4* -0.10 2.3*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 6.5 +0.20 6.7
ATLAS_2020_I1801434 13000 3.3 +1.8 5.1
ATLAS_2022_I2037744 13000 2.8 -0.70 2.1
ATLAS_2022_I2077575 13000 1.4 -0.100 1.3
CMS_2018_I1703993 13000 97 -5.0 92
CMS_2021_I1901295 13000 30 +1.0 31
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 76 +1.0 77
CMS_2021_I1901295 13000 24 0 24
ttbar HT
 ATLAS_2019_I1750330 13000 5.9 +0.20 6.1
ATLAS_2020_I1801434 13000 3.5 +0.20 3.7
ATLAS_2022_I2037744 13000 0.73 +1.6 2.3
ATLAS_2022_I2077575 13000 1.9* -0.30 1.6
CMS_2021_I1901295 13000 23 0 23
m(ttbar)
 ATLAS_2019_I1750330 13000 4.9 0 4.9*
ATLAS_2020_I1801434 13000 3.8 +1.2 5.0
ATLAS_2022_I2037744 13000 1.6 -0.69 0.91
ATLAS_2022_I2077575 13000 1.6* 0 1.6*
CMS_2018_I1703993 13000 85 0 85
CMS_2021_I1901295 13000 30 -2.0 28*
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.2 +1.1 5.3
ttbar pT
 ATLAS_2019_I1750330 13000 7.0 -0.20 6.8
ATLAS_2020_I1801434 13000 3.3 +1.7 5.0*
ATLAS_2022_I2037744 13000 2.5 -0.40 2.1
ATLAS_2022_I2077575 13000 1.3* 0 1.3
CMS_2018_I1703993 13000 67 -5.0 62
CMS_2021_I1901295 13000 17 +1.0 18
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 3.7 +1.5 5.2
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 1.8* +0.40 2.2*
CMS_2021_I1901295 13000 32 -2.0 30
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.5 +0.100 6.6
ATLAS_2020_I1801434 13000 2.9 +0.40 3.3*
ATLAS_2022_I2037744 13000 0.65 -0.15 0.50
ATLAS_2022_I2077575 13000 2.6* -0.70 1.9
CMS_2018_I1703993 13000 64 -4.0 60
CMS_2021_I1901295 13000 28 -1.0 27
Mean rapidity
 ATLAS_2019_I1750330 13000 9.8 +0.20 10
ATLAS_2020_I1801434 13000 4.2 -1.0 3.2
ATLAS_2022_I2077575 13000 2.0* -0.30 1.7
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.2 -0.90 1.3
ttbarej.m
 CMS_2021_I1901295 13000 20 0 20
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.7 -0.70 4.0
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.0 +0.20 4.2
Cross sections
 ATLAS_2022_I2037744 13000 0.92 -0.82 0.10
ATLAS_2022_I2077575 13000 6.5 -1.3 5.2
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.