Generator

Details for Pythia 8.165 default vs. tune-4cx

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (default) Δ χ2+5% (tune-4cx)
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 - 1.0
B jet
η
CMS_2018_I1703993 13000 21 -6.0 15
B jet
pT
CMS_2018_I1703993 13000 28 -9.0 19
bjbj.m
CMS_2018_I1703993 13000 28 -8.0 20
bjbj.pt
CMS_2018_I1703993 13000 36 -11 25
bjt.dphi
ATLAS_2022_I2037744 13000 4.4 -1.1 3.3
ej.pt
ATLAS_2022_I2037744 13000 6.9 -0.90 6.0
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 2.8 -1.00 1.8
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 2.6 -0.30 2.3
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 3.2 -0.90 2.3
ΔR(extra jets)
ATLAS_2020_I1801434 13000 1.1 -0.33 0.77
ejej.dphi
ATLAS_2022_I2037744 13000 4.5 -0.40 4.1
ejets.ht
CMS_2021_I1901295 13000 22 0 22
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 3.4 +1.0 4.4
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 1.1 +0.80 1.9*
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 2.9 0 2.9
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 2.0 +0.10 2.1
Jet mass
Jet mass
CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.64 -0.12 0.52
Jet pT
ATLAS_2014_I1304688 7000 8.9 -0.100 8.8
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 2.3 +0.80 3.1
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.31 +0.090 0.40
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 2.1 +0.30 2.4
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.4 +0.20 1.6
Identified Particles
pT(KS0)
ATLAS_2019_I1746286 7000 2.2 0 2.2
Identified Particles
E(KS0) to E(jet) ratio
ATLAS_2019_I1746286 7000 3.0 +0.20 3.2
Lepton η
ATLAS_2019_I1759875 13000 12 0 12
CMS_2018_I1703993 13000 13 -4.6 8.4
Lepton pT
ATLAS_2019_I1759875 13000 16 +1.0 17
CMS_2018_I1703993 13000 25 -7.0 18
CMS_2021_I1901295 13000 5.7 -0.50 5.2
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 5.7 0 5.7
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.76 +0.24 1.0
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 8.4 -0.80 7.6
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
E
ATLAS_2019_I1759875 13000 12 +2.0 14
Dilepton
Δη
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 18 -6.0 12
Dilepton
Δφ
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 7.0 +2.0 9.0*
CMS_2018_I1703993 13000 21 -7.0 14
Dilepton
HT
ATLAS_2019_I1759875 13000 15 -1.0 14
Dilepton
m
ATLAS_2019_I1759875 13000 13 0 13
CMS_2018_I1703993 13000 24 -8.0 16
Dilepton
pT
ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 16 0 16
CMS_2018_I1703993 13000 24 -8.0 16
Dilepton
y
ATLAS_2019_I1759875 13000 9.3 -0.20 9.1
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 2.5 +14 16
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 +2.0 17
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 3.1 +3.9 7.0
CMS_2018_I1703993 13000 39 -13 26
sumpt
ATLAS_2022_I2152933 13000 4.0 +8.0 12
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 13 -1.0 12
ATLAS_2020_I1801434 13000 5.7 -0.20 5.5
ATLAS_2022_I2077575 13000 5.6 +1.0 6.6
Top pT
ATLAS_2019_I1750330 13000 7.4 -1.3 6.1
ATLAS_2020_I1801434 13000 2.5 +0.20 2.7*
ATLAS_2022_I2037744 13000 5.8 -0.80 5.0
ATLAS_2022_I2077575 13000 2.6* +0.70 3.3*
CMS_2018_I1703993 13000 42 -5.0 37
CMS_2021_I1901295 13000 15 0 15
top.pt.ttbarRF
CMS_2018_I1703993 13000 31 -5.0 26
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 2.3 +1.1 3.4
Top rapidity
ATLAS_2019_I1750330 13000 5.0 -0.100 4.9
ATLAS_2020_I1801434 13000 2.0 -0.40 1.6
ATLAS_2022_I2037744 13000 2.3 -0.20 2.1
ATLAS_2022_I2077575 13000 3.0* +0.80 3.8*
CMS_2018_I1703993 13000 28 -7.0 21
CMS_2021_I1901295 13000 9.7 -1.2 8.5
topej.dphi
ATLAS_2022_I2037744 13000 5.7 -0.40 5.3
topej.m
ATLAS_2022_I2037744 13000 5.8 -0.90 4.9
χ(ttbar)
ATLAS_2019_I1750330 13000 5.3 +0.60 5.9
ATLAS_2020_I1801434 13000 2.3 -0.40 1.9
ATLAS_2022_I2077575 13000 8.4* -0.60 7.8*
Δφ(ttbar)
ATLAS_2019_I1750330 13000 6.8 +0.70 7.5
ATLAS_2020_I1801434 13000 5.5 +3.3 8.8
ATLAS_2022_I2037744 13000 12 -2.8 9.2
ATLAS_2022_I2077575 13000 6.2 +1.5 7.7
CMS_2018_I1703993 13000 75 -17 58
CMS_2021_I1901295 13000 17 0 17
Δy (ttbar)
CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 37 -9.0 28
CMS_2021_I1901295 13000 9.3 +0.100 9.4
ttbar HT
ATLAS_2019_I1750330 13000 8.1 -1.5 6.6
ATLAS_2020_I1801434 13000 1.8 +0.30 2.1
ATLAS_2022_I2037744 13000 3.5 -0.40 3.1
ATLAS_2022_I2077575 13000 3.2 +0.80 4.0
CMS_2021_I1901295 13000 13 -2.0 11
m(ttbar)
ATLAS_2019_I1750330 13000 4.9 -1.8 3.1
ATLAS_2020_I1801434 13000 2.8 -0.80 2.0
ATLAS_2022_I2037744 13000 4.1 -0.80 3.3
ATLAS_2022_I2077575 13000 2.1* 0 2.1*
CMS_2018_I1703993 13000 30 -7.0 23
CMS_2021_I1901295 13000 14 +3.0 17
Pcrossttbar
ATLAS_2020_I1801434 13000 1.9 +2.6 4.5
ttbar pT
ATLAS_2019_I1750330 13000 13 -2.0 11
ATLAS_2020_I1801434 13000 4.7 +0.50 5.2
ATLAS_2022_I2037744 13000 12 -4.2 7.8
ATLAS_2022_I2077575 13000 3.5* +0.10 3.6
CMS_2018_I1703993 13000 64 -10 54
CMS_2021_I1901295 13000 19 -3.0 16
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 4.1 +0.90 5.0
ttbar.thetaStar
ATLAS_2022_I2077575 13000 5.2 +4.1 9.3*
CMS_2021_I1901295 13000 14 0 14
Ttbar rapidity
ATLAS_2019_I1750330 13000 4.4 0 4.4
ATLAS_2020_I1801434 13000 2.0 -0.30 1.7
ATLAS_2022_I2037744 13000 2.8 -0.100 2.7
ATLAS_2022_I2077575 13000 3.5 +3.6 7.1*
CMS_2018_I1703993 13000 26 -6.0 20
CMS_2021_I1901295 13000 11 0 11
Mean rapidity
ATLAS_2019_I1750330 13000 4.3 -0.40 3.9
ATLAS_2020_I1801434 13000 1.4 +0.50 1.9
ATLAS_2022_I2077575 13000 3.4 +4.2 7.6*
ttbarej.ht
ATLAS_2022_I2037744 13000 14 -3.0 11
ttbarej.m
CMS_2021_I1901295 13000 15 -2.0 13
pT ratio
W to b
ATLAS_2020_I1801434 13000 1.9 -0.20 1.7
pT ratio
W to top
ATLAS_2020_I1801434 13000 2.2 +0.100 2.3
Cross sections
ATLAS_2022_I2037744 13000 25 -3.0 22
ATLAS_2022_I2077575 13000 22 +4.0 26
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.