Generator / tune

Details for Pythia 8.308 default-MBR 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 0.85 +0.25 1.1
Asymmetry
AC vs pTttbar
CMS_2016_I1430892 8000 6.0 +8.0 14
Asymmetry
AC vs yttbar
CMS_2016_I1430892 8000 0.79 +4.0 4.8
Asymmetry
ACl vs Mttbar
CMS_2016_I1430892 8000 0.22 +2.2 2.4
Asymmetry
ACl vs pTttbar
CMS_2016_I1430892 8000 4.8 -4.1 0.69
Asymmetry
ACl vs yttbar
CMS_2016_I1430892 8000 0.71 +1.6 2.3
Asymmetry
Energy asymmetry
ATLAS_2021_I1941095 13000 n/a - 0.19
B jet
η
CMS_2018_I1703993 13000 27 -5.0 22
B jet
pT
CMS_2018_I1703993 13000 32 -5.0 27
bjbj.m
CMS_2018_I1703993 13000 38 -6.0 32
bjbj.pt
CMS_2018_I1703993 13000 33 -5.0 28
bjt.dphi
ATLAS_2022_I2037744 13000 0.45 +1.4 1.8
ej.pt
ATLAS_2022_I2037744 13000 2.1* 0 2.1
pT ratio
Extra jets
ATLAS_2020_I1801434 13000 3.4 -0.20 3.2
pT ratio
Extra to leading jet
ATLAS_2020_I1801434 13000 3.3 -0.30 3.0
pT ratio
Extra jet to Top
ATLAS_2020_I1801434 13000 2.9 +0.20 3.1
ΔR(extra jets)
ATLAS_2020_I1801434 13000 3.2 +0.70 3.9
ejej.dphi
ATLAS_2022_I2037744 13000 1.2 -0.49 0.71
ejets.ht
CMS_2021_I1901295 13000 14 -2.0 12
ΔR(extra, leading jet)
ATLAS_2020_I1801434 13000 4.1 -1.5 2.6
ΔR(top, extra jet)
ATLAS_2020_I1801434 13000 2.9 0 2.9
Jets + Veto
Gap frac. vs Veto scale
ATLAS_2012_I1094568 7000 0.30 -0.22 0.081
Jets + Veto
Gap frac. vs scalar veto scale
ATLAS_2012_I1094568 7000 0.12 -0.073 0.047
Jet mass
Jet mass
CMS_2017_I1518399 8000 2.0 +3.1 5.1
CMS_2019_I1764472 13000 0.29 -0.18 0.11
Jet pT
ATLAS_2014_I1304688 7000 7.7 +0.20 7.9
ATLAS_2019_I1718132 13000 6.8* -2.5 4.3*
Dijet
Δη
ATLAS_2019_I1718132 13000 7.3 -3.0 4.3
Dijet
Δφ
ATLAS_2019_I1718132 13000 10 -3.6 6.4
Dijet
HT
ATLAS_2019_I1718132 13000 5.4 -1.5 3.9
Jet mass
Dijet mass
ATLAS_2019_I1718132 13000 9.0 -2.5 6.5
Jet Shapes
Differential Jet Shape
ATLAS_2013_I1243871 7000 2.4 0 2.4
Jet Shapes
Integral Jet Shape
ATLAS_2013_I1243871 7000 0.33 +0.030 0.36
Identified Particles
E(KS0)
ATLAS_2019_I1746286 7000 2.1 +0.10 2.2
Identified Particles
η(KS0)
ATLAS_2019_I1746286 7000 1.3 +0.100 1.4
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 3.2 +0.30 3.5
Lepton η
ATLAS_2019_I1759875 13000 18 0 18
CMS_2018_I1703993 13000 17 -3.0 14
Lepton pT
ATLAS_2019_I1759875 13000 25 +1.0 26
CMS_2018_I1703993 13000 31 -4.0 27
CMS_2021_I1901295 13000 7.9 -0.30 7.6
Identified Particles
E(Λ0)
ATLAS_2019_I1746286 7000 4.5 +0.60 5.1
Identified Particles
η(Λ0)
ATLAS_2019_I1746286 7000 0.70 -0.030 0.67
Identified Particles
pT0)
ATLAS_2019_I1746286 7000 5.5 +0.50 6.0
Δφ(lepton,jet)
ATLAS_2019_I1718132 13000 10 -1.8 8.2*
Dilepton
E
ATLAS_2019_I1759875 13000 22 -1.0 21
Dilepton
Δη
CMS_2016_I1430892 8000 0.43 -0.040 0.39
CMS_2018_I1703993 13000 22 -3.0 19
Dilepton
Δφ
ATLAS_2019_I1718132 13000 9.9 -3.1 6.8
ATLAS_2019_I1759875 13000 16* -2.0 14
CMS_2018_I1703993 13000 31 -6.0 25
Dilepton
HT
ATLAS_2019_I1759875 13000 21 0 21
Dilepton
m
ATLAS_2019_I1759875 13000 19 0 19
CMS_2018_I1703993 13000 32 -7.0 25
Dilepton
pT
ATLAS_2019_I1718132 13000 7.7 -2.7 5.0
ATLAS_2019_I1759875 13000 20 +1.0 21
CMS_2018_I1703993 13000 27 -6.0 21
Dilepton
y
ATLAS_2019_I1759875 13000 16 -1.0 15
ST(leptons, jets)
ATLAS_2019_I1718132 13000 n/a - n/a
nch
ATLAS_2022_I2152933 13000 2.4 -0.50 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 18 -2.0 16
Jet Multiplicities
Jet multiplicity
ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 5.0 +0.60 5.6
CMS_2018_I1703993 13000 24 -3.0 21
sumpt
ATLAS_2022_I2152933 13000 5.0 -1.6 3.4
Jet Multiplicities
Subjet multiplicity
ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
ATLAS_2019_I1750330 13000 5.3 -0.30 5.0
ATLAS_2020_I1801434 13000 3.2 +0.70 3.9
ATLAS_2022_I2077575 13000 2.3 +0.70 3.0
Top pT
ATLAS_2019_I1750330 13000 4.3* 0 4.3
ATLAS_2020_I1801434 13000 2.8 +0.40 3.2
ATLAS_2022_I2037744 13000 n/a - 1.2
ATLAS_2022_I2077575 13000 1.8* +0.30 2.1*
CMS_2018_I1703993 13000 41 -4.0 37
CMS_2021_I1901295 13000 15* -1.0 14*
top.pt.ttbarRF
CMS_2018_I1703993 13000 40 -5.0 35
pT ratio
Top quarks
ATLAS_2020_I1801434 13000 4.1 +0.10 4.2
Top rapidity
ATLAS_2019_I1750330 13000 4.9 +0.20 5.1
ATLAS_2020_I1801434 13000 4.7 -0.60 4.1
ATLAS_2022_I2037744 13000 2.3 -0.90 1.4
ATLAS_2022_I2077575 13000 2.4* +0.20 2.6*
CMS_2018_I1703993 13000 34 -3.0 31
CMS_2021_I1901295 13000 14 0 14
topej.dphi
ATLAS_2022_I2037744 13000 2.4 -0.40 2.0
topej.m
ATLAS_2022_I2037744 13000 0.65 +0.100 0.75
χ(ttbar)
ATLAS_2019_I1750330 13000 5.2 0 5.2
ATLAS_2020_I1801434 13000 4.4 -0.60 3.8
ATLAS_2022_I2077575 13000 2.4 +0.20 2.6
Δφ(ttbar)
ATLAS_2019_I1750330 13000 5.9 0 5.9
ATLAS_2020_I1801434 13000 3.7 +1.0 4.7
ATLAS_2022_I2037744 13000 1.4 -0.90 0.50
ATLAS_2022_I2077575 13000 2.6 +0.70 3.3
CMS_2018_I1703993 13000 55 -5.0 50
CMS_2021_I1901295 13000 24 -1.0 23
Δy (ttbar)
CMS_2016_I1430892 8000 0.12 +0.19 0.31
CMS_2018_I1703993 13000 35 -3.0 32
CMS_2021_I1901295 13000 13 0 13
ttbar HT
ATLAS_2019_I1750330 13000 4.1 +0.10 4.2
ATLAS_2020_I1801434 13000 3.6 +0.10 3.7
ATLAS_2022_I2037744 13000 n/a - 1.7
ATLAS_2022_I2077575 13000 n/a - 5.2*
CMS_2021_I1901295 13000 14 -1.0 13
m(ttbar)
ATLAS_2019_I1750330 13000 3.6* +0.50 4.1*
ATLAS_2020_I1801434 13000 3.2 +0.20 3.4
ATLAS_2022_I2037744 13000 n/a - 1.2
ATLAS_2022_I2077575 13000 1.9* +0.40 2.3*
CMS_2018_I1703993 13000 41 -1.0 40
CMS_2021_I1901295 13000 17* 0 17
Pcrossttbar
ATLAS_2020_I1801434 13000 3.5 +0.10 3.6
ttbar pT
ATLAS_2019_I1750330 13000 4.5 +0.30 4.8
ATLAS_2020_I1801434 13000 3.3 +0.40 3.7*
ATLAS_2022_I2037744 13000 1.7 +0.80 2.5
ATLAS_2022_I2077575 13000 1.8* +0.80 2.6
CMS_2018_I1703993 13000 34 -1.0 33
CMS_2021_I1901295 13000 13 0 13
pT ratio
ttbar to extra jet
ATLAS_2020_I1801434 13000 4.0 -0.60 3.4
ttbar.thetaStar
ATLAS_2022_I2077575 13000 3.2 +0.70 3.9
CMS_2021_I1901295 13000 18 +1.0 19
Ttbar rapidity
ATLAS_2019_I1750330 13000 4.6 +0.20 4.8
ATLAS_2020_I1801434 13000 2.5 +0.20 2.7
ATLAS_2022_I2037744 13000 0.91 -0.080 0.83
ATLAS_2022_I2077575 13000 2.2 +0.60 2.8
CMS_2018_I1703993 13000 32 -3.0 29
CMS_2021_I1901295 13000 16 +1.0 17
Mean rapidity
ATLAS_2019_I1750330 13000 6.7 +0.40 7.1
ATLAS_2020_I1801434 13000 3.4 -0.40 3.0
ATLAS_2022_I2077575 13000 2.2 +0.50 2.7
ttbarej.ht
ATLAS_2022_I2037744 13000 0.42 +1.9 2.3
ttbarej.m
CMS_2021_I1901295 13000 14 -1.0 13
pT ratio
W to b
ATLAS_2020_I1801434 13000 3.9 -0.50 3.4
pT ratio
W to top
ATLAS_2020_I1801434 13000 3.9 -0.20 3.7
Cross sections
ATLAS_2022_I2037744 13000 0.71 +1.7 2.4
ATLAS_2022_I2077575 13000 14 +6.0 20
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.