Generator / tune

Details for Pythia 6.427 374 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 1.2 - n/a
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 8.0 - n/a
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 4.3 - n/a
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 2.7 - n/a
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 4.9 - n/a
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 3.8 - n/a
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 3.5 -2.9 0.62
B jet
 η
 CMS_2018_I1703993 13000 33 +4.0 37
B jet
 pT
 CMS_2018_I1703993 13000 41 0 41
bjbj.m
 CMS_2018_I1703993 13000 52 0 52
bjbj.pt
 CMS_2018_I1703993 13000 40 +4.0 44
bjt.dphi
 ATLAS_2022_I2037744 13000 1.0 +1.2 2.2
ej.pt
 ATLAS_2022_I2037744 13000 2.5 +0.50 3.0*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 2.9 -0.80 2.1
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.8 -0.70 3.1
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.9 -0.70 3.2
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.6 -0.50 2.1
ejej.dphi
 ATLAS_2022_I2037744 13000 0.66 +0.44 1.1
ejets.ht
 CMS_2021_I1901295 13000 12 -1.0 11
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.7 -0.80 3.9
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.9 -0.60 2.3
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.30 +0.22 0.52
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.18 +0.070 0.25
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 5.6 - n/a
CMS_2019_I1764472 13000 1.3 -0.74 0.56
Jet pT
 ATLAS_2014_I1304688 7000 18 -1.0 17
ATLAS_2019_I1718132 13000 13* - n/a
Dijet
 Δη
 ATLAS_2019_I1718132 13000 14 - n/a
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 17 - n/a
Dijet
 HT
 ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 22 - n/a
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 2.4 +0.30 2.7
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.40 -0.010 0.39
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.7 -0.20 1.5
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.99 -0.030 0.96
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.5 +0.10 1.6
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.6 0 2.6
Lepton η
 ATLAS_2019_I1759875 13000 29 +3.0 32
CMS_2018_I1703993 13000 21 +1.0 22
Lepton pT
 ATLAS_2019_I1759875 13000 38 +6.0 44
CMS_2018_I1703993 13000 37 +3.0 40
CMS_2021_I1901295 13000 12 -1.0 11
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 5.2 +0.80 6.0
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.4 +0.10 1.5
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 6.9 +0.60 7.5
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 24* - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 31 +5.0 36
Dilepton
 Δη
 CMS_2016_I1430892 8000 1.00 - n/a
CMS_2018_I1703993 13000 27 +3.0 30
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 22* - n/a
ATLAS_2019_I1759875 13000 23* +4.0 27*
CMS_2018_I1703993 13000 32 +6.0 38
Dilepton
 HT
 ATLAS_2019_I1759875 13000 31 +5.0 36
Dilepton
 m
 ATLAS_2019_I1759875 13000 32 +2.0 34
CMS_2018_I1703993 13000 34 +3.0 37
Dilepton
 pT
 ATLAS_2019_I1718132 13000 15 - n/a
ATLAS_2019_I1759875 13000 32 +5.0 37
CMS_2018_I1703993 13000 32 +4.0 36
Dilepton
 y
 ATLAS_2019_I1759875 13000 25* +1.0 26
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 2.7 +0.30 3.0
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 17 -1.0 16
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.4 -2.1 5.3
CMS_2018_I1703993 13000 28 +9.0 37
sumpt
 ATLAS_2022_I2152933 13000 7.6 -2.3 5.3
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 6.9 +0.50 7.4
ATLAS_2020_I1801434 13000 5.2 -1.5 3.7
ATLAS_2022_I2077575 13000 2.0 -0.50 1.5*
Top pT
 ATLAS_2019_I1750330 13000 5.9 +0.70 6.6*
ATLAS_2020_I1801434 13000 4.4 -0.80 3.6
ATLAS_2022_I2037744 13000 2.5 -1.3 1.2
ATLAS_2022_I2077575 13000 1.3* +0.100 1.4*
CMS_2018_I1703993 13000 58 +3.0 61
CMS_2021_I1901295 13000 19 0 19*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 55 +5.0 60
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.6 -1.3 4.3
Top rapidity
 ATLAS_2019_I1750330 13000 7.4 0 7.4
ATLAS_2020_I1801434 13000 5.3 -0.70 4.6
ATLAS_2022_I2037744 13000 1.4* +1.1 2.5*
ATLAS_2022_I2077575 13000 1.5* -0.10 1.4*
CMS_2018_I1703993 13000 53 +5.0 58
CMS_2021_I1901295 13000 19 0 19
topej.dphi
 ATLAS_2022_I2037744 13000 2.4 +0.80 3.2
topej.m
 ATLAS_2022_I2037744 13000 0.36 +0.61 0.97
χ(ttbar)
 ATLAS_2019_I1750330 13000 7.6 +0.30 7.9
ATLAS_2020_I1801434 13000 5.6 -1.4 4.2
ATLAS_2022_I2077575 13000 1.6* -0.20 1.4*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.0 -0.40 6.6
ATLAS_2020_I1801434 13000 6.4 -1.9 4.5
ATLAS_2022_I2037744 13000 1.4 +3.4 4.8
ATLAS_2022_I2077575 13000 2.5 -1.3 1.2
CMS_2018_I1703993 13000 76 +12 88
CMS_2021_I1901295 13000 28 -2.0 26
Δy (ttbar)
 CMS_2016_I1430892 8000 0.84 - n/a
CMS_2018_I1703993 13000 59 +5.0 64
CMS_2021_I1901295 13000 21 +1.0 22
ttbar HT
 ATLAS_2019_I1750330 13000 5.7 +0.40 6.1
ATLAS_2020_I1801434 13000 5.7 -2.3 3.4
ATLAS_2022_I2037744 13000 1.5 -0.20 1.3
ATLAS_2022_I2077575 13000 2.0* -0.40 1.6
CMS_2021_I1901295 13000 18 +1.0 19
m(ttbar)
 ATLAS_2019_I1750330 13000 5.1 +1.1 6.2*
ATLAS_2020_I1801434 13000 4.4 +0.30 4.7
ATLAS_2022_I2037744 13000 n/a - 1.6
ATLAS_2022_I2077575 13000 1.8* -0.50 1.3*
CMS_2018_I1703993 13000 66 +31 97*
CMS_2021_I1901295 13000 25 +4.0 29
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.7 -1.2 3.5
ttbar pT
 ATLAS_2019_I1750330 13000 7.0 +0.40 7.4
ATLAS_2020_I1801434 13000 4.5 -0.60 3.9
ATLAS_2022_I2037744 13000 1.8 - n/a
ATLAS_2022_I2077575 13000 1.4 -0.100 1.3*
CMS_2018_I1703993 13000 50 +14 64
CMS_2021_I1901295 13000 17 0 17
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.0 -0.60 3.4
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 1.8 -0.10 1.7*
CMS_2021_I1901295 13000 26 +3.0 29
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.5 0 6.5
ATLAS_2020_I1801434 13000 3.8* -0.70 3.1
ATLAS_2022_I2037744 13000 1.5 -0.30 1.2
ATLAS_2022_I2077575 13000 1.8 +0.60 2.4
CMS_2018_I1703993 13000 47 +6.0 53
CMS_2021_I1901295 13000 23 +2.0 25
Mean rapidity
 ATLAS_2019_I1750330 13000 9.3 -0.30 9.0
ATLAS_2020_I1801434 13000 4.4 -1.2 3.2
ATLAS_2022_I2077575 13000 1.3 +1.4 2.7
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.9 -1.2 1.7
ttbarej.m
 CMS_2021_I1901295 13000 19 +1.0 20
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.3 -1.4 3.9
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.1 -0.90 4.2
Cross sections
 ATLAS_2022_I2037744 13000 4.9 +1.9 6.8
ATLAS_2022_I2077575 13000 5.3 -0.80 4.5
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.