Generator / tune

Details for Pythia 6.427 346 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 0.58 -0.47 0.11
B jet
 η
 CMS_2018_I1703993 13000 39 -3.0 36
B jet
 pT
 CMS_2018_I1703993 13000 47 -8.0 39
bjbj.m
 CMS_2018_I1703993 13000 63 -12 51
bjbj.pt
 CMS_2018_I1703993 13000 47 -6.0 41
bjt.dphi
 ATLAS_2022_I2037744 13000 1.1 +0.80 1.9
ej.pt
 ATLAS_2022_I2037744 13000 3.7* -0.80 2.9
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.1 -0.30 2.8
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.8 +0.10 3.9
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.4 -0.10 3.3
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 2.7 +0.40 3.1
ejej.dphi
 ATLAS_2022_I2037744 13000 1.2 0 1.2
ejets.ht
 CMS_2021_I1901295 13000 14 -3.0 11
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.5 -0.60 3.9
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 0.27 +0.070 0.34
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.13 +0.030 0.16
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.92 +1.4 2.3
Jet pT
 ATLAS_2014_I1304688 7000 15 0 15
ATLAS_2019_I1718132 13000 n/a - n/a
Dijet
 Δη
 ATLAS_2019_I1718132 13000 20 - n/a
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 24 - n/a
Dijet
 HT
 ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 29 - n/a
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 2.5 0 2.5
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.29 +0.060 0.35
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.1 0 2.1
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.5 0 1.5
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.8 +0.30 2.1
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.0 +0.60 3.6
Lepton η
 ATLAS_2019_I1759875 13000 28 +2.0 30
CMS_2018_I1703993 13000 25 -3.0 22
Lepton pT
 ATLAS_2019_I1759875 13000 39 +3.0 42
CMS_2018_I1703993 13000 46 -7.0 39
CMS_2021_I1901295 13000 13 -2.0 11
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 3.0 +0.40 3.4
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.60 +0.070 0.67
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 2.8 +1.1 3.9
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 40* - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 31 +3.0 34
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 34 -5.0 29
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 22 - n/a
ATLAS_2019_I1759875 13000 20 +3.0 23
CMS_2018_I1703993 13000 44 -4.0 40
Dilepton
 HT
 ATLAS_2019_I1759875 13000 31 +3.0 34
Dilepton
 m
 ATLAS_2019_I1759875 13000 30 +5.0 35
CMS_2018_I1703993 13000 42 -7.0 35
Dilepton
 pT
 ATLAS_2019_I1718132 13000 31 - n/a
ATLAS_2019_I1759875 13000 31 +4.0 35
CMS_2018_I1703993 13000 39 -5.0 34
Dilepton
 y
 ATLAS_2019_I1759875 13000 23 +4.0 27*
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 2.3 -0.40 1.9
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 15 0 15
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.7 +0.100 7.8
CMS_2018_I1703993 13000 35 -5.0 30
sumpt
 ATLAS_2022_I2152933 13000 3.7 -0.60 3.1
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 6.5 +0.60 7.1
ATLAS_2020_I1801434 13000 5.7 -0.90 4.8
ATLAS_2022_I2077575 13000 1.7 +0.60 2.3*
Top pT
 ATLAS_2019_I1750330 13000 5.9* +0.40 6.3
ATLAS_2020_I1801434 13000 4.9 +0.20 5.1
ATLAS_2022_I2037744 13000 1.4 +1.4 2.8
ATLAS_2022_I2077575 13000 1.3* -0.20 1.1*
CMS_2018_I1703993 13000 55 -2.0 53
CMS_2021_I1901295 13000 17* +1.0 18*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 54 -2.0 52
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.6 -0.20 5.4
Top rapidity
 ATLAS_2019_I1750330 13000 6.3 +0.50 6.8
ATLAS_2020_I1801434 13000 5.4 +0.40 5.8
ATLAS_2022_I2037744 13000 1.4 +0.50 1.9
ATLAS_2022_I2077575 13000 1.7* -0.30 1.4*
CMS_2018_I1703993 13000 52 -1.0 51
CMS_2021_I1901295 13000 17 0 17
topej.dphi
 ATLAS_2022_I2037744 13000 2.9 -0.20 2.7
topej.m
 ATLAS_2022_I2037744 13000 n/a - 1.8
χ(ttbar)
 ATLAS_2019_I1750330 13000 6.7 +0.80 7.5
ATLAS_2020_I1801434 13000 5.0 +0.100 5.1
ATLAS_2022_I2077575 13000 2.1* -0.10 2.0*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 5.6 +0.40 6.0
ATLAS_2020_I1801434 13000 6.4 +0.100 6.5
ATLAS_2022_I2037744 13000 n/a - 2.8
ATLAS_2022_I2077575 13000 3.3 -2.3 1.0
CMS_2018_I1703993 13000 81 -2.0 79
CMS_2021_I1901295 13000 25 -1.0 24
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 57 +2.0 59
CMS_2021_I1901295 13000 18 +1.0 19
ttbar HT
 ATLAS_2019_I1750330 13000 5.0 +0.80 5.8
ATLAS_2020_I1801434 13000 4.5 -0.20 4.3
ATLAS_2022_I2037744 13000 n/a - 2.9
ATLAS_2022_I2077575 13000 2.1* -0.80 1.3*
CMS_2021_I1901295 13000 16 +3.0 19
m(ttbar)
 ATLAS_2019_I1750330 13000 5.0 +0.80 5.8
ATLAS_2020_I1801434 13000 5.8 +0.60 6.4
ATLAS_2022_I2037744 13000 2.9 -0.60 2.3
ATLAS_2022_I2077575 13000 1.3* +0.100 1.4*
CMS_2018_I1703993 13000 65 -4.0 61
CMS_2021_I1901295 13000 22* +3.0 25*
Pcrossttbar
 ATLAS_2020_I1801434 13000 5.9 -0.90 5.0
ttbar pT
 ATLAS_2019_I1750330 13000 6.4 +0.40 6.8
ATLAS_2020_I1801434 13000 5.5 -0.90 4.6
ATLAS_2022_I2037744 13000 3.2 +0.80 4.0
ATLAS_2022_I2077575 13000 2.0* -0.70 1.3*
CMS_2018_I1703993 13000 54 -4.0 50
CMS_2021_I1901295 13000 16 0 16
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 8.1 -3.0 5.1
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.2* +0.80 3.0*
CMS_2021_I1901295 13000 23 +2.0 25
Ttbar rapidity
 ATLAS_2019_I1750330 13000 5.6 +0.60 6.2
ATLAS_2020_I1801434 13000 3.2* +0.30 3.5
ATLAS_2022_I2037744 13000 1.1 +2.2 3.3
ATLAS_2022_I2077575 13000 1.7 -0.100 1.6
CMS_2018_I1703993 13000 48 -2.0 46
CMS_2021_I1901295 13000 21 +1.0 22
Mean rapidity
 ATLAS_2019_I1750330 13000 8.0 0 8.0
ATLAS_2020_I1801434 13000 4.3 -0.100 4.2
ATLAS_2022_I2077575 13000 2.5* -0.70 1.8
ttbarej.ht
 ATLAS_2022_I2037744 13000 1.1 +2.0 3.1
ttbarej.m
 CMS_2021_I1901295 13000 18 -1.0 17
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 5.0 -0.50 4.5
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 5.5 -0.20 5.3
Cross sections
 ATLAS_2022_I2037744 13000 6.9 +9.1 16
ATLAS_2022_I2077575 13000 5.8 -1.6 4.2
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.