Generator

Details for Pythia 8.165 tune-4cx vs. tune-A2

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (tune-4cx) Δ χ2+5% (tune-A2)
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 1.0 - n/a
B jet
 η
 CMS_2018_I1703993 13000 15 +10 25
B jet
 pT
 CMS_2018_I1703993 13000 19 +14 33
bjbj.m
 CMS_2018_I1703993 13000 20 +10 30
bjbj.pt
 CMS_2018_I1703993 13000 25 +21 46
bjt.dphi
 ATLAS_2022_I2037744 13000 3.3 +1.7 5.0
ej.pt
 ATLAS_2022_I2037744 13000 6.0 +2.8 8.8
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 1.8 -0.60 1.2
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 2.3 +1.2 3.5
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 2.3 +2.3 4.6
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 0.77 +0.43 1.2
ejej.dphi
 ATLAS_2022_I2037744 13000 4.1 +1.9 6.0
ejets.ht
 CMS_2021_I1901295 13000 22 +8.0 30
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.4 +1.1 5.5
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 1.9* -0.70 1.2
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 2.9 -0.90 2.0
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 2.1 -0.40 1.7
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.52 -0.28 0.24
Jet pT
 ATLAS_2014_I1304688 7000 8.8 -0.40 8.4
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 3.1 +0.70 3.8
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.40 +0.12 0.52
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 2.4 +0.50 2.9
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.6 +0.20 1.8
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 2.2 +0.20 2.4
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.2 +0.30 3.5
Lepton η
 ATLAS_2019_I1759875 13000 12 +4.0 16
CMS_2018_I1703993 13000 8.4 +5.6 14
Lepton pT
 ATLAS_2019_I1759875 13000 17 +6.0 23
CMS_2018_I1703993 13000 18 +9.0 27
CMS_2021_I1901295 13000 5.2 -1.0 4.2
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 5.7 +1.6 7.3
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.0 +0.20 1.2
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.6 +0.70 8.3
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 14 +4.0 18
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 12 +6.0 18
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 9.0* +1.0 10.0
CMS_2018_I1703993 13000 14 +8.0 22
Dilepton
 HT
 ATLAS_2019_I1759875 13000 14 +5.0 19
Dilepton
 m
 ATLAS_2019_I1759875 13000 13 +4.0 17
CMS_2018_I1703993 13000 16 +9.0 25
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 16 +6.0 22
CMS_2018_I1703993 13000 16 +8.0 24
Dilepton
 y
 ATLAS_2019_I1759875 13000 9.1 +3.9 13
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 16 -7.6 8.4
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 17 +20 37
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 7.0 +6.0 13
CMS_2018_I1703993 13000 26 +24 50
sumpt
 ATLAS_2022_I2152933 13000 12 -4.2 7.8
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 12 +3.0 15
ATLAS_2020_I1801434 13000 5.5 +2.9 8.4
ATLAS_2022_I2077575 13000 6.6 +3.3 9.9*
Top pT
 ATLAS_2019_I1750330 13000 6.1 +1.9 8.0
ATLAS_2020_I1801434 13000 2.7* +3.3 6.0*
ATLAS_2022_I2037744 13000 5.0 +1.6 6.6
ATLAS_2022_I2077575 13000 3.3* -0.20 3.1*
CMS_2018_I1703993 13000 37 +11 48
CMS_2021_I1901295 13000 15 +1.0 16
top.pt.ttbarRF
 CMS_2018_I1703993 13000 26 +9.0 35
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 3.4 +2.6 6.0
Top rapidity
 ATLAS_2019_I1750330 13000 4.9 +3.7 8.6
ATLAS_2020_I1801434 13000 1.6 +0.20 1.8
ATLAS_2022_I2037744 13000 2.1 +0.70 2.8
ATLAS_2022_I2077575 13000 3.8* -0.50 3.3
CMS_2018_I1703993 13000 21 +10 31
CMS_2021_I1901295 13000 8.5 -1.1 7.4
topej.dphi
 ATLAS_2022_I2037744 13000 5.3 +2.2 7.5
topej.m
 ATLAS_2022_I2037744 13000 4.9 +2.3 7.2
χ(ttbar)
 ATLAS_2019_I1750330 13000 5.9 +3.1 9.0
ATLAS_2020_I1801434 13000 1.9 +0.10 2.0
ATLAS_2022_I2077575 13000 7.8* -3.3 4.5
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.5 +4.5 12
ATLAS_2020_I1801434 13000 8.8 +3.2 12
ATLAS_2022_I2037744 13000 9.2 +8.8 18
ATLAS_2022_I2077575 13000 7.7 +1.4 9.1
CMS_2018_I1703993 13000 58 +21 79
CMS_2021_I1901295 13000 17 +1.0 18
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 28 +9.0 37
CMS_2021_I1901295 13000 9.4 -2.3 7.1
ttbar HT
 ATLAS_2019_I1750330 13000 6.6 +4.4 11
ATLAS_2020_I1801434 13000 2.1 +1.4 3.5
ATLAS_2022_I2037744 13000 3.1 +1.4 4.5
ATLAS_2022_I2077575 13000 4.0 +2.7 6.7*
CMS_2021_I1901295 13000 11 -1.0 10
m(ttbar)
 ATLAS_2019_I1750330 13000 3.1 +2.3 5.4*
ATLAS_2020_I1801434 13000 2.0 +3.2 5.2
ATLAS_2022_I2037744 13000 3.3 +2.6 5.9
ATLAS_2022_I2077575 13000 2.1* 0 2.1*
CMS_2018_I1703993 13000 23 +8.0 31
CMS_2021_I1901295 13000 17 0 17
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.5 +1.7 6.2
ttbar pT
 ATLAS_2019_I1750330 13000 11 +5.0 16
ATLAS_2020_I1801434 13000 5.2 +2.9 8.1
ATLAS_2022_I2037744 13000 7.8 +7.2 15
ATLAS_2022_I2077575 13000 3.6 +0.20 3.8*
CMS_2018_I1703993 13000 54 +12 66
CMS_2021_I1901295 13000 16 +6.0 22
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 5.0 -1.6 3.4
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 9.3* -4.5 4.8
CMS_2021_I1901295 13000 14 -3.0 11
Ttbar rapidity
 ATLAS_2019_I1750330 13000 4.4 +3.5 7.9
ATLAS_2020_I1801434 13000 1.7 +1.1 2.8
ATLAS_2022_I2037744 13000 2.7 +1.5 4.2
ATLAS_2022_I2077575 13000 7.1* -3.5 3.6
CMS_2018_I1703993 13000 20 +8.0 28
CMS_2021_I1901295 13000 11 -2.6 8.4
Mean rapidity
 ATLAS_2019_I1750330 13000 3.9 -0.40 3.5
ATLAS_2020_I1801434 13000 1.9 -0.60 1.3
ATLAS_2022_I2077575 13000 7.6* -3.7 3.9
ttbarej.ht
 ATLAS_2022_I2037744 13000 11 +8.0 19
ttbarej.m
 CMS_2021_I1901295 13000 13 +5.0 18
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 1.7 +0.10 1.8
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 2.3 -0.30 2.0
Cross sections
 ATLAS_2022_I2037744 13000 22 +11 33
ATLAS_2022_I2077575 13000 26 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.