Generator / tune

Details for Pythia 6.427 372 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 - 1.8
B jet
 η
 CMS_2018_I1703993 13000 42 -8.0 34
B jet
 pT
 CMS_2018_I1703993 13000 48 -8.0 40
bjbj.m
 CMS_2018_I1703993 13000 61 -13 48
bjbj.pt
 CMS_2018_I1703993 13000 52 -12 40
bjt.dphi
 ATLAS_2022_I2037744 13000 2.9 +0.70 3.6
ej.pt
 ATLAS_2022_I2037744 13000 3.6* -0.90 2.7*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.9 +0.80 4.7
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 4.9 -0.30 4.6
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 4.1 +0.40 4.5
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.6 +0.70 3.3
ejej.dphi
 ATLAS_2022_I2037744 13000 2.1 -0.60 1.5
ejets.ht
 CMS_2021_I1901295 13000 20 -3.0 17
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.1 +0.50 3.6
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 3.5 -0.70 2.8
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.072 +0.24 0.31
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.029 +0.17 0.20
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 1.1 -0.38 0.72
Jet pT
 ATLAS_2014_I1304688 7000 18 -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 1.4 -0.100 1.3
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.18 -0.020 0.16
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.6 -0.10 1.5
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.88 -0.17 0.71
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 2.7 +0.20 2.9
Lepton η
 ATLAS_2019_I1759875 13000 33 -1.0 32
CMS_2018_I1703993 13000 26 -5.0 21
Lepton pT
 ATLAS_2019_I1759875 13000 45 -2.0 43
CMS_2018_I1703993 13000 47 -9.0 38
CMS_2021_I1901295 13000 10 +1.0 11
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 4.5 -0.90 3.6
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.74 +0.030 0.77
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 5.9 -1.1 4.8
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 37 -1.0 36
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 37 -8.0 29
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 26* 0 26*
CMS_2018_I1703993 13000 44 -5.0 39
Dilepton
 HT
 ATLAS_2019_I1759875 13000 37 -1.0 36
Dilepton
 m
 ATLAS_2019_I1759875 13000 34 0 34
CMS_2018_I1703993 13000 42 -6.0 36
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 36 +1.0 37
CMS_2018_I1703993 13000 41 -8.0 33
Dilepton
 y
 ATLAS_2019_I1759875 13000 29* -4.0 25
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 2.1 -1.6 0.49
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 22 -5.0 17
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 6.9 -0.50 6.4
CMS_2018_I1703993 13000 37 -8.0 29
sumpt
 ATLAS_2022_I2152933 13000 2.9 +1.1 4.0
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.0 0 7.0
ATLAS_2020_I1801434 13000 4.2 +0.100 4.3*
ATLAS_2022_I2077575 13000 2.0* +0.50 2.5
Top pT
 ATLAS_2019_I1750330 13000 6.0* +0.50 6.5*
ATLAS_2020_I1801434 13000 5.3 -1.8 3.5
ATLAS_2022_I2037744 13000 3.4* -1.5 1.9
ATLAS_2022_I2077575 13000 1.4* 0 1.4*
CMS_2018_I1703993 13000 63 -3.0 60
CMS_2021_I1901295 13000 20* -1.0 19*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 63 -4.0 59
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 4.9 -0.20 4.7
Top rapidity
 ATLAS_2019_I1750330 13000 7.3 -0.30 7.0
ATLAS_2020_I1801434 13000 4.9 -0.20 4.7
ATLAS_2022_I2037744 13000 1.1 +0.20 1.3*
ATLAS_2022_I2077575 13000 1.5* -0.30 1.2*
CMS_2018_I1703993 13000 62 -5.0 57
CMS_2021_I1901295 13000 18 0 18
topej.dphi
 ATLAS_2022_I2037744 13000 3.2 -0.60 2.6
topej.m
 ATLAS_2022_I2037744 13000 3.1 -1.4 1.7
χ(ttbar)
 ATLAS_2019_I1750330 13000 7.6 +0.20 7.8
ATLAS_2020_I1801434 13000 5.1 +0.80 5.9
ATLAS_2022_I2077575 13000 2.3* -0.20 2.1*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.6 -1.0 6.6
ATLAS_2020_I1801434 13000 5.3 -0.50 4.8
ATLAS_2022_I2037744 13000 n/a - 2.6
ATLAS_2022_I2077575 13000 2.9* -0.40 2.5
CMS_2018_I1703993 13000 98 -10 88
CMS_2021_I1901295 13000 29 0 29
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 70 -4.0 66
CMS_2021_I1901295 13000 20 0 20
ttbar HT
 ATLAS_2019_I1750330 13000 5.5 +0.20 5.7
ATLAS_2020_I1801434 13000 6.3 -2.6 3.7
ATLAS_2022_I2037744 13000 2.3 -1.1 1.2
ATLAS_2022_I2077575 13000 2.1* -0.90 1.2*
CMS_2021_I1901295 13000 n/a - 18
m(ttbar)
 ATLAS_2019_I1750330 13000 6.0* 0 6.0*
ATLAS_2020_I1801434 13000 5.1 -1.0 4.1
ATLAS_2022_I2037744 13000 3.1 -1.3 1.8
ATLAS_2022_I2077575 13000 1.5* 0 1.5*
CMS_2018_I1703993 13000 100* -27 73
CMS_2021_I1901295 13000 26 -1.0 25*
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.7 -0.40 4.3
ttbar pT
 ATLAS_2019_I1750330 13000 7.4* -0.20 7.2
ATLAS_2020_I1801434 13000 4.3 -0.30 4.0*
ATLAS_2022_I2037744 13000 n/a - 3.0
ATLAS_2022_I2077575 13000 1.9* -0.50 1.4*
CMS_2018_I1703993 13000 64 -11 53
CMS_2021_I1901295 13000 21 -1.0 20
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.9 -0.40 4.5
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 1.6 +0.90 2.5
CMS_2021_I1901295 13000 27 -1.0 26
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.6 -0.30 6.3
ATLAS_2020_I1801434 13000 3.8 -0.70 3.1
ATLAS_2022_I2037744 13000 2.2 -0.30 1.9
ATLAS_2022_I2077575 13000 2.8* -1.3 1.5*
CMS_2018_I1703993 13000 55 -2.0 53
CMS_2021_I1901295 13000 23 0 23
Mean rapidity
 ATLAS_2019_I1750330 13000 9.3 -0.50 8.8
ATLAS_2020_I1801434 13000 3.5 +0.30 3.8
ATLAS_2022_I2077575 13000 2.1 -0.60 1.5*
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.0 +0.40 2.4
ttbarej.m
 CMS_2021_I1901295 13000 22 -1.0 21
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.4 +0.70 5.1
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.4 0 4.4
Cross sections
 ATLAS_2022_I2037744 13000 8.7 +1.3 10
ATLAS_2022_I2077575 13000 7.4 -1.3 6.1
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.