Generator / tune

Details for Pythia 6.426 350 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 1.4 -1.1 0.31
B jet
 η
 CMS_2018_I1703993 13000 47 -2.0 45
B jet
 pT
 CMS_2018_I1703993 13000 56 -3.0 53
bjbj.m
 CMS_2018_I1703993 13000 65 -3.0 62
bjbj.pt
 CMS_2018_I1703993 13000 58 -3.0 55
bjt.dphi
 ATLAS_2022_I2037744 13000 1.1 +0.30 1.4
ej.pt
 ATLAS_2022_I2037744 13000 2.8* -0.20 2.6
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 2.1 +0.30 2.4
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 2.8 +0.90 3.7
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.3 +0.70 4.0
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 3.1* -0.70 2.4
ejej.dphi
 ATLAS_2022_I2037744 13000 0.47 +1.0 1.5
ejets.ht
 CMS_2021_I1901295 13000 14 +1.0 15
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.3 +0.30 3.6
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.6 +0.10 2.7
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.15 +0.25 0.40
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.049 +0.061 0.11
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.57 +0.25 0.82
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 2.6 0 2.6
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.42 +0.010 0.43
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.8 -0.30 1.5
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.95 -0.16 0.79
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.9 -0.50 1.4
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.1 -0.80 2.3
Lepton η
 ATLAS_2019_I1759875 13000 36 -2.0 34
CMS_2018_I1703993 13000 28 0 28
Lepton pT
 ATLAS_2019_I1759875 13000 48 -1.0 47
CMS_2018_I1703993 13000 53 -3.0 50
CMS_2021_I1901295 13000 12 +1.0 13
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.1 -0.100 6.0
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.1 0 1.1
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.7 +0.20 7.9
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 42 -3.0 39
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 41 -1.0 40
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 24 -1.0 23
CMS_2018_I1703993 13000 48 +2.0 50
Dilepton
 HT
 ATLAS_2019_I1759875 13000 39 -1.0 38
Dilepton
 m
 ATLAS_2019_I1759875 13000 38 -3.0 35
CMS_2018_I1703993 13000 49 -5.0 44
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 39 0 39
CMS_2018_I1703993 13000 46 -4.0 42
Dilepton
 y
 ATLAS_2019_I1759875 13000 29 -2.0 27
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 0.44 +0.38 0.82
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 +2.0 21
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.3 -0.90 6.4
CMS_2018_I1703993 13000 43 0 43
sumpt
 ATLAS_2022_I2152933 13000 1.3 +1.4 2.7
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.6 +0.20 7.8
ATLAS_2020_I1801434 13000 5.2 +0.60 5.8*
ATLAS_2022_I2077575 13000 2.6* -1.2 1.4
Top pT
 ATLAS_2019_I1750330 13000 5.7 +0.60 6.3*
ATLAS_2020_I1801434 13000 4.3 +0.30 4.6
ATLAS_2022_I2037744 13000 2.1 -1.1 0.99
ATLAS_2022_I2077575 13000 1.7* -0.40 1.3*
CMS_2018_I1703993 13000 75 +1.0 76
CMS_2021_I1901295 13000 20* +2.0 22*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 73 0 73
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.3 -0.40 4.9
Top rapidity
 ATLAS_2019_I1750330 13000 7.3 +0.40 7.7
ATLAS_2020_I1801434 13000 5.2 -0.70 4.5
ATLAS_2022_I2037744 13000 1.9 -0.70 1.2
ATLAS_2022_I2077575 13000 2.0* -0.10 1.9
CMS_2018_I1703993 13000 69 0 69
CMS_2021_I1901295 13000 22 +3.0 25*
topej.dphi
 ATLAS_2022_I2037744 13000 2.5 0 2.5
topej.m
 ATLAS_2022_I2037744 13000 1.6 -0.99 0.61
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.2 +0.60 8.8
ATLAS_2020_I1801434 13000 5.1 -0.80 4.3
ATLAS_2022_I2077575 13000 3.1* -0.60 2.5*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.4 0 7.4
ATLAS_2020_I1801434 13000 6.5 -0.80 5.7
ATLAS_2022_I2037744 13000 2.6 +0.90 3.5
ATLAS_2022_I2077575 13000 2.9 -1.3 1.6
CMS_2018_I1703993 13000 100 0 100
CMS_2021_I1901295 13000 31 +1.0 32
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 76 0 76
CMS_2021_I1901295 13000 21 +2.0 23
ttbar HT
 ATLAS_2019_I1750330 13000 5.9 +0.50 6.4
ATLAS_2020_I1801434 13000 4.4 -0.10 4.3
ATLAS_2022_I2037744 13000 3.9 -2.4 1.5
ATLAS_2022_I2077575 13000 2.9* -1.5 1.4
CMS_2021_I1901295 13000 21 +2.0 23
m(ttbar)
 ATLAS_2019_I1750330 13000 5.1* 0 5.1
ATLAS_2020_I1801434 13000 4.8 +0.20 5.0
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 1.6* -0.10 1.5*
CMS_2018_I1703993 13000 84 -6.0 78
CMS_2021_I1901295 13000 26* +2.0 28
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.9 -0.60 4.3
ttbar pT
 ATLAS_2019_I1750330 13000 6.9 +0.100 7.0
ATLAS_2020_I1801434 13000 5.0 -0.30 4.7
ATLAS_2022_I2037744 13000 1.2 +0.20 1.4
ATLAS_2022_I2077575 13000 1.9* -0.50 1.4*
CMS_2018_I1703993 13000 63 +9.0 72
CMS_2021_I1901295 13000 19 -1.0 18
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.3 -1.4 3.9
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.4 +0.10 2.5
CMS_2021_I1901295 13000 28 +2.0 30
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.8 +0.20 7.0
ATLAS_2020_I1801434 13000 4.0 -0.30 3.7
ATLAS_2022_I2037744 13000 1.5 -0.61 0.89
ATLAS_2022_I2077575 13000 2.7* -0.50 2.2
CMS_2018_I1703993 13000 62 +2.0 64
CMS_2021_I1901295 13000 25 +2.0 27
Mean rapidity
 ATLAS_2019_I1750330 13000 9.9 +0.100 10
ATLAS_2020_I1801434 13000 3.7 +0.40 4.1
ATLAS_2022_I2077575 13000 2.9* -1.3 1.6
ttbarej.ht
 ATLAS_2022_I2037744 13000 3.0 -0.90 2.1
ttbarej.m
 CMS_2021_I1901295 13000 19 +2.0 21
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.6 +0.50 5.1
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.6 +0.10 4.7
Cross sections
 ATLAS_2022_I2037744 13000 7.7 -4.5 3.2
ATLAS_2022_I2077575 13000 9.9 -2.5 7.4
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.