Generator / tune

Details for Pythia 6.427 348 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 0.25 - n/a
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 5.6 - n/a
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 1.9 - n/a
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 2.4 - n/a
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 3.3 - n/a
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 1.2 - n/a
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 1.0 +0.90 1.9
B jet
 η
 CMS_2018_I1703993 13000 21 0 21
B jet
 pT
 CMS_2018_I1703993 13000 24 +1.0 25
bjbj.m
 CMS_2018_I1703993 13000 30 0 30
bjbj.pt
 CMS_2018_I1703993 13000 25 0 25
bjt.dphi
 ATLAS_2022_I2037744 13000 0.77 +0.19 0.96
ej.pt
 ATLAS_2022_I2037744 13000 2.2* +0.40 2.6*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 2.2 -0.70 1.5
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 2.2 +0.100 2.3
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 2.0 +0.90 2.9
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 1.9 -0.100 1.8
ejej.dphi
 ATLAS_2022_I2037744 13000 0.70 -0.29 0.41
ejets.ht
 CMS_2021_I1901295 13000 7.7 -0.90 6.8
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.1 -1.2 1.9
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.2 -0.30 1.9
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.16 +0.11 0.27
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.046 +0.13 0.18
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 4.3 - n/a
CMS_2019_I1764472 13000 0.32 +0.31 0.63
Jet pT
 ATLAS_2014_I1304688 7000 9.7 -1.2 8.5
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 2.1 +0.70 2.8
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.24 +0.070 0.31
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.7 +0.50 2.2
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.0 +0.50 1.5
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.0 +0.20 2.2
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.9 +0.30 3.2
Lepton η
 ATLAS_2019_I1759875 13000 21 -3.0 18
CMS_2018_I1703993 13000 13 0 13
Lepton pT
 ATLAS_2019_I1759875 13000 30 -7.0 23
CMS_2018_I1703993 13000 23 0 23
CMS_2021_I1901295 13000 6.3 +0.50 6.8
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 2.6 +0.60 3.2
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.45 -0.010 0.44
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 2.8 +0.50 3.3
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 24 -4.0 20
Dilepton
 Δη
 CMS_2016_I1430892 8000 0.49 - n/a
CMS_2018_I1703993 13000 17 +1.0 18
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 18* -5.0 13
CMS_2018_I1703993 13000 21 +1.0 22
Dilepton
 HT
 ATLAS_2019_I1759875 13000 24 -5.0 19
Dilepton
 m
 ATLAS_2019_I1759875 13000 23 -4.0 19
CMS_2018_I1703993 13000 20 +1.0 21
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 25 -6.0 19
CMS_2018_I1703993 13000 19 0 19
Dilepton
 y
 ATLAS_2019_I1759875 13000 17 -1.0 16*
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 1.7 -0.92 0.78
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 11 0 11
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 5.3 -1.3 4.0
CMS_2018_I1703993 13000 19 0 19
sumpt
 ATLAS_2022_I2152933 13000 2.4 -0.30 2.1
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 4.4 +0.30 4.7
ATLAS_2020_I1801434 13000 3.6 -0.20 3.4*
ATLAS_2022_I2077575 13000 3.1* -1.4 1.7
Top pT
 ATLAS_2019_I1750330 13000 3.7* +0.100 3.8*
ATLAS_2020_I1801434 13000 3.3* -0.50 2.8
ATLAS_2022_I2037744 13000 1.2 -0.23 0.97
ATLAS_2022_I2077575 13000 1.8* -0.50 1.3*
CMS_2018_I1703993 13000 36 -4.0 32
CMS_2021_I1901295 13000 12* 0 12*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 34 -3.0 31
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 3.5 +0.40 3.9
Top rapidity
 ATLAS_2019_I1750330 13000 4.7 +0.100 4.8
ATLAS_2020_I1801434 13000 3.6 -0.50 3.1
ATLAS_2022_I2037744 13000 0.95 +0.25 1.2
ATLAS_2022_I2077575 13000 2.0* -0.70 1.3*
CMS_2018_I1703993 13000 31 -3.0 28
CMS_2021_I1901295 13000 11 0 11
topej.dphi
 ATLAS_2022_I2037744 13000 2.0 +0.10 2.1
topej.m
 ATLAS_2022_I2037744 13000 3.3 -1.5 1.8
χ(ttbar)
 ATLAS_2019_I1750330 13000 5.2 +0.70 5.9
ATLAS_2020_I1801434 13000 3.0 0 3.0
ATLAS_2022_I2077575 13000 3.0* -0.90 2.1*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 4.9 -0.20 4.7
ATLAS_2020_I1801434 13000 4.8 -0.90 3.9
ATLAS_2022_I2037744 13000 2.4 +0.40 2.8
ATLAS_2022_I2077575 13000 4.2* -1.8 2.4
CMS_2018_I1703993 13000 46 -3.0 43
CMS_2021_I1901295 13000 17 0 17
Δy (ttbar)
 CMS_2016_I1430892 8000 0.46 - n/a
CMS_2018_I1703993 13000 33 -2.0 31
CMS_2021_I1901295 13000 12 0 12
ttbar HT
 ATLAS_2019_I1750330 13000 3.7 +0.20 3.9
ATLAS_2020_I1801434 13000 3.1 -0.60 2.5
ATLAS_2022_I2037744 13000 n/a - 0.60
ATLAS_2022_I2077575 13000 3.0* -0.50 2.5*
CMS_2021_I1901295 13000 11 - n/a
m(ttbar)
 ATLAS_2019_I1750330 13000 3.0 +1.3 4.3*
ATLAS_2020_I1801434 13000 3.9 -1.2 2.7
ATLAS_2022_I2037744 13000 0.67 - n/a
ATLAS_2022_I2077575 13000 1.9* -0.40 1.5*
CMS_2018_I1703993 13000 64* -28 36
CMS_2021_I1901295 13000 15* +1.0 16
Pcrossttbar
 ATLAS_2020_I1801434 13000 5.3 -1.7 3.6
ttbar pT
 ATLAS_2019_I1750330 13000 4.5 +0.30 4.8
ATLAS_2020_I1801434 13000 3.5 -0.30 3.2
ATLAS_2022_I2037744 13000 2.2 -1.2 1.0
ATLAS_2022_I2077575 13000 2.3* -0.90 1.4*
CMS_2018_I1703993 13000 31 -2.0 29
CMS_2021_I1901295 13000 10.0* +1.0 11
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.4 +1.0 5.4
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 3.0* -0.50 2.5*
CMS_2021_I1901295 13000 17 0 17
Ttbar rapidity
 ATLAS_2019_I1750330 13000 4.1 +0.20 4.3
ATLAS_2020_I1801434 13000 2.6 0 2.6
ATLAS_2022_I2037744 13000 0.35 +0.29 0.64
ATLAS_2022_I2077575 13000 2.0 +0.40 2.4*
CMS_2018_I1703993 13000 28 -3.0 25
CMS_2021_I1901295 13000 14 +1.0 15
Mean rapidity
 ATLAS_2019_I1750330 13000 5.9 +0.40 6.3
ATLAS_2020_I1801434 13000 2.6 -0.30 2.3
ATLAS_2022_I2077575 13000 2.0 +0.40 2.4*
ttbarej.ht
 ATLAS_2022_I2037744 13000 0.81 -0.13 0.68
ttbarej.m
 CMS_2021_I1901295 13000 n/a - 12
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 3.4 0 3.4
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 3.6 -0.70 2.9
Cross sections
 ATLAS_2022_I2037744 13000 0.11 +0.68 0.79
ATLAS_2022_I2077575 13000 12 -5.1 6.9
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.