Generator / tune

Details for Pythia 8.308 CP5 vs. 8.313

pp/ppbar → Top (tt)


Observable Reference Energy χ2+5% (8.308) Δ χ2+5% (8.313)
Asymmetry
 AC vs Mttbar
 CMS_2016_I1430892 8000 3.5 -0.10 3.4
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 6.6 0 6.6
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 1.9 +0.50 2.4
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 5.7 -5.5 0.21
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 2.5 -1.6 0.88
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 2.7 -0.70 2.0
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 n/a - 0.14
B jet
 η
 CMS_2018_I1703993 13000 32 +3.0 35
B jet
 pT
 CMS_2018_I1703993 13000 36 +3.0 39
bjbj.m
 CMS_2018_I1703993 13000 50 -1.0 49
bjbj.pt
 CMS_2018_I1703993 13000 40 +2.0 42
bjt.dphi
 ATLAS_2022_I2037744 13000 2.1 +1.3 3.4
ej.pt
 ATLAS_2022_I2037744 13000 3.0* -0.30 2.7*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 4.9 -0.20 4.7
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 5.0 -0.30 4.7
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 5.1 -0.20 4.9
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 4.0 -0.60 3.4
ejej.dphi
 ATLAS_2022_I2037744 13000 2.0 -0.40 1.6
ejets.ht
 CMS_2021_I1901295 13000 32 -1.0 31
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 4.4 -0.40 4.0
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 4.4 -0.20 4.2
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.030 -0.0030 0.027
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.037 +0.012 0.049
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 7.8 -2.1 5.7
CMS_2019_I1764472 13000 0.93 -0.11 0.82
Jet pT
 ATLAS_2014_I1304688 7000 15 +1.0 16
ATLAS_2019_I1718132 13000 14* +2.0 16*
Dijet
 Δη
 ATLAS_2019_I1718132 13000 16 +6.0 22
Dijet
 Δφ
 ATLAS_2019_I1718132 13000 22 +1.0 23
Dijet
 HT
 ATLAS_2019_I1718132 13000 n/a - n/a
Jet mass
 Dijet mass
 ATLAS_2019_I1718132 13000 23 +3.0 26
Jet Shapes
 Differential Jet Shape
 ATLAS_2013_I1243871 7000 1.4 +0.30 1.7
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.20 +0.020 0.22
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.5 -0.20 1.3
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 0.67 -0.070 0.60
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.5 0 1.5
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.2 +0.20 2.4
Lepton η
 ATLAS_2019_I1759875 13000 28 +1.0 29
CMS_2018_I1703993 13000 20 +1.0 21
Lepton pT
 ATLAS_2019_I1759875 13000 38 +1.0 39
CMS_2018_I1703993 13000 37 +3.0 40
CMS_2021_I1901295 13000 11 +1.0 12
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 3.9 +0.40 4.3
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.67 +0.010 0.68
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 4.2 +0.80 5.0
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 24* +1.0 25
Dilepton
 E
 ATLAS_2019_I1759875 13000 31 +1.0 32
Dilepton
 Δη
 CMS_2016_I1430892 8000 1.2 -0.100 1.1
CMS_2018_I1703993 13000 27 +5.0 32
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 15 +1.0 16
ATLAS_2019_I1759875 13000 21 +1.0 22
CMS_2018_I1703993 13000 38 0 38
Dilepton
 HT
 ATLAS_2019_I1759875 13000 32 0 32
Dilepton
 m
 ATLAS_2019_I1759875 13000 29 0 29
CMS_2018_I1703993 13000 34 +6.0 40
Dilepton
 pT
 ATLAS_2019_I1718132 13000 15 +3.0 18
ATLAS_2019_I1759875 13000 32 +1.0 33
CMS_2018_I1703993 13000 32 0 32
Dilepton
 y
 ATLAS_2019_I1759875 13000 22 +5.0 27*
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 3.4 -1.6 1.8
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 45 -9.0 36
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 5.9 -0.60 5.3
CMS_2018_I1703993 13000 29 +4.0 33
sumpt
 ATLAS_2022_I2152933 13000 5.8 +0.60 6.4
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.5 0 7.5
ATLAS_2020_I1801434 13000 3.6 -0.30 3.3
ATLAS_2022_I2077575 13000 2.1 +0.90 3.0*
Top pT
 ATLAS_2019_I1750330 13000 7.3* -0.50 6.8*
ATLAS_2020_I1801434 13000 3.8 0 3.8
ATLAS_2022_I2037744 13000 4.5* +0.30 4.8
ATLAS_2022_I2077575 13000 1.7* +0.10 1.8*
CMS_2018_I1703993 13000 56 +4.0 60
CMS_2021_I1901295 13000 22* +1.0 23
top.pt.ttbarRF
 CMS_2018_I1703993 13000 54 +4.0 58
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.3 +0.30 5.6
Top rapidity
 ATLAS_2019_I1750330 13000 7.7 +0.20 7.9
ATLAS_2020_I1801434 13000 5.1 +0.60 5.7
ATLAS_2022_I2037744 13000 2.1* +0.10 2.2
ATLAS_2022_I2077575 13000 1.8* +0.20 2.0*
CMS_2018_I1703993 13000 51 +5.0 56
CMS_2021_I1901295 13000 19 +1.0 20
topej.dphi
 ATLAS_2022_I2037744 13000 2.2 +1.3 3.5
topej.m
 ATLAS_2022_I2037744 13000 1.4 +1.0 2.4
χ(ttbar)
 ATLAS_2019_I1750330 13000 7.8 -0.20 7.6
ATLAS_2020_I1801434 13000 4.8 0 4.8
ATLAS_2022_I2077575 13000 2.7* -0.70 2.0
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 9.0 -0.20 8.8
ATLAS_2020_I1801434 13000 4.1 -0.100 4.0
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 2.0 0 2.0
CMS_2018_I1703993 13000 88 +3.0 91
CMS_2021_I1901295 13000 35 +4.0 39
Δy (ttbar)
 CMS_2016_I1430892 8000 0.98 +0.010 0.99
CMS_2018_I1703993 13000 57 +2.0 59
CMS_2021_I1901295 13000 18 +1.0 19
ttbar HT
 ATLAS_2019_I1750330 13000 6.4 -0.20 6.2
ATLAS_2020_I1801434 13000 3.8 -0.100 3.7
ATLAS_2022_I2037744 13000 n/a - n/a
ATLAS_2022_I2077575 13000 2.2* +0.60 2.8
CMS_2021_I1901295 13000 19 0 19
m(ttbar)
 ATLAS_2019_I1750330 13000 5.4* +0.60 6.0*
ATLAS_2020_I1801434 13000 4.6 +0.90 5.5
ATLAS_2022_I2037744 13000 1.5 - n/a
ATLAS_2022_I2077575 13000 1.6* 0 1.6*
CMS_2018_I1703993 13000 56 +7.0 63
CMS_2021_I1901295 13000 29* -1.0 28*
Pcrossttbar
 ATLAS_2020_I1801434 13000 4.2 -0.30 3.9
ttbar pT
 ATLAS_2019_I1750330 13000 7.7 +0.60 8.3
ATLAS_2020_I1801434 13000 4.4* -0.60 3.8
ATLAS_2022_I2037744 13000 2.5 +1.9 4.4
ATLAS_2022_I2077575 13000 1.8* -0.10 1.7
CMS_2018_I1703993 13000 56 +1.0 57
CMS_2021_I1901295 13000 24* +1.0 25
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.7 -0.70 4.0
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.4 -0.20 2.2
CMS_2021_I1901295 13000 26 0 26
Ttbar rapidity
 ATLAS_2019_I1750330 13000 7.1 +0.30 7.4
ATLAS_2020_I1801434 13000 4.0 -0.20 3.8
ATLAS_2022_I2037744 13000 3.1 0 3.1
ATLAS_2022_I2077575 13000 2.4* -0.80 1.6
CMS_2018_I1703993 13000 47 +4.0 51
CMS_2021_I1901295 13000 23 0 23
Mean rapidity
 ATLAS_2019_I1750330 13000 9.1 +0.20 9.3
ATLAS_2020_I1801434 13000 3.9 -0.40 3.5
ATLAS_2022_I2077575 13000 2.5* -0.80 1.7
ttbarej.ht
 ATLAS_2022_I2037744 13000 1.5 +1.4 2.9
ttbarej.m
 CMS_2021_I1901295 13000 n/a - n/a
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.4 +0.70 5.1
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.7 -0.50 4.2
Cross sections
 ATLAS_2022_I2037744 13000 11 +2.0 13
ATLAS_2022_I2077575 13000 8.3 +1.3 9.6
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.