Generator / tune

Details for Pythia 6.427 345 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 0.29 - n/a
Asymmetry
 AC vs pTttbar
 CMS_2016_I1430892 8000 6.8 - n/a
Asymmetry
 AC vs yttbar
 CMS_2016_I1430892 8000 2.7 - n/a
Asymmetry
 ACl vs Mttbar
 CMS_2016_I1430892 8000 1.5 - n/a
Asymmetry
 ACl vs pTttbar
 CMS_2016_I1430892 8000 0.62 - n/a
Asymmetry
 ACl vs yttbar
 CMS_2016_I1430892 8000 0.50 - n/a
Asymmetry
 Energy asymmetry
 ATLAS_2021_I1941095 13000 0.71 +1.5 2.2
B jet
 η
 CMS_2018_I1703993 13000 33 -2.0 31
B jet
 pT
 CMS_2018_I1703993 13000 39 -3.0 36
bjbj.m
 CMS_2018_I1703993 13000 46 -2.0 44
bjbj.pt
 CMS_2018_I1703993 13000 40 -1.0 39
bjt.dphi
 ATLAS_2022_I2037744 13000 1.9 +0.70 2.6
ej.pt
 ATLAS_2022_I2037744 13000 2.3 +0.10 2.4
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 1.7 +1.0 2.7
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 2.8 +1.2 4.0
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.2 0 3.2
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 1.7 +0.20 1.9
ejej.dphi
 ATLAS_2022_I2037744 13000 0.92 +3.7 4.6
ejets.ht
 CMS_2021_I1901295 13000 13 -2.0 11
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 2.6 +1.9 4.5
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.3 +0.70 3.0
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.046 +0.19 0.24
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.020 +0.054 0.074
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 2.5 - n/a
CMS_2019_I1764472 13000 1.3 -0.30 1.0
Jet pT
 ATLAS_2014_I1304688 7000 17 -2.0 15
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 1.9 +0.10 2.0
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.27 -0.030 0.24
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.6 +0.40 2.0
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.1 +0.30 1.4
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.8 +0.20 2.0
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 3.1 0 3.1
Lepton η
 ATLAS_2019_I1759875 13000 24 +6.0 30
CMS_2018_I1703993 13000 20 -1.0 19
Lepton pT
 ATLAS_2019_I1759875 13000 33 +8.0 41
CMS_2018_I1703993 13000 37 -2.0 35
CMS_2021_I1901295 13000 9.1 +3.9 13
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 2.4 +0.80 3.2
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 0.42 +0.13 0.55
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 3.1 +0.90 4.0
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 27 +6.0 33
Dilepton
 Δη
 CMS_2016_I1430892 8000 0.91 - n/a
CMS_2018_I1703993 13000 27 -1.0 26
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 19 +2.0 21
CMS_2018_I1703993 13000 35 +1.0 36
Dilepton
 HT
 ATLAS_2019_I1759875 13000 27 +7.0 34
Dilepton
 m
 ATLAS_2019_I1759875 13000 25 +6.0 31
CMS_2018_I1703993 13000 34 -2.0 32
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 28 +6.0 34
CMS_2018_I1703993 13000 31 +1.0 32
Dilepton
 y
 ATLAS_2019_I1759875 13000 19 +5.0 24
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 1.2 +0.50 1.7
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 0 15
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 5.8 -0.80 5.0
CMS_2018_I1703993 13000 31 -1.0 30
sumpt
 ATLAS_2022_I2152933 13000 3.3 +1.3 4.6
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 5.9 +1.3 7.2
ATLAS_2020_I1801434 13000 3.4 +0.10 3.5
ATLAS_2022_I2077575 13000 2.2* -0.90 1.3
Top pT
 ATLAS_2019_I1750330 13000 5.2* +1.5 6.7*
ATLAS_2020_I1801434 13000 3.6 -0.50 3.1
ATLAS_2022_I2037744 13000 3.0 -0.60 2.4*
ATLAS_2022_I2077575 13000 1.5* -0.40 1.1*
CMS_2018_I1703993 13000 51 -1.0 50
CMS_2021_I1901295 13000 15* +3.0 18*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 50 -1.0 49
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 4.2 +0.30 4.5
Top rapidity
 ATLAS_2019_I1750330 13000 6.0 +1.3 7.3
ATLAS_2020_I1801434 13000 4.1 +0.20 4.3
ATLAS_2022_I2037744 13000 1.7 +1.0 2.7*
ATLAS_2022_I2077575 13000 1.7* -0.40 1.3*
CMS_2018_I1703993 13000 46 0 46
CMS_2021_I1901295 13000 16 +2.0 18*
topej.dphi
 ATLAS_2022_I2037744 13000 2.3 +0.20 2.5
topej.m
 ATLAS_2022_I2037744 13000 0.69 +0.51 1.2
χ(ttbar)
 ATLAS_2019_I1750330 13000 6.4 +1.3 7.7
ATLAS_2020_I1801434 13000 4.9 -0.90 4.0
ATLAS_2022_I2077575 13000 2.1* -1.1 1.0*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.1 -1.2 5.9
ATLAS_2020_I1801434 13000 5.7 -1.4 4.3
ATLAS_2022_I2037744 13000 1.8 +0.20 2.0
ATLAS_2022_I2077575 13000 3.2* -1.8 1.4
CMS_2018_I1703993 13000 71 +2.0 73
CMS_2021_I1901295 13000 25 -2.0 23
Δy (ttbar)
 CMS_2016_I1430892 8000 1.0 - n/a
CMS_2018_I1703993 13000 51 0 51
CMS_2021_I1901295 13000 16 +4.0 20
ttbar HT
 ATLAS_2019_I1750330 13000 4.7 +1.1 5.8
ATLAS_2020_I1801434 13000 2.8 +0.60 3.4
ATLAS_2022_I2037744 13000 1.7 - n/a
ATLAS_2022_I2077575 13000 2.3* -1.4 0.95
CMS_2021_I1901295 13000 16 0 16
m(ttbar)
 ATLAS_2019_I1750330 13000 4.3 +1.7 6.0
ATLAS_2020_I1801434 13000 2.9 +0.60 3.5
ATLAS_2022_I2037744 13000 1.9 - n/a
ATLAS_2022_I2077575 13000 1.6* -0.50 1.1*
CMS_2018_I1703993 13000 60 0 60
CMS_2021_I1901295 13000 21 +3.0 24*
Pcrossttbar
 ATLAS_2020_I1801434 13000 3.9 -0.20 3.7
ttbar pT
 ATLAS_2019_I1750330 13000 6.0 +1.0 7.0*
ATLAS_2020_I1801434 13000 3.6 +0.10 3.7
ATLAS_2022_I2037744 13000 0.93 +1.4 2.3
ATLAS_2022_I2077575 13000 2.3* -1.00 1.3*
CMS_2018_I1703993 13000 48 +2.0 50
CMS_2021_I1901295 13000 15 0 15
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 3.1 +2.1 5.2
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 2.2* -0.90 1.3
CMS_2021_I1901295 13000 22 +3.0 25
Ttbar rapidity
 ATLAS_2019_I1750330 13000 5.5 +1.1 6.6
ATLAS_2020_I1801434 13000 2.6 +1.1 3.7
ATLAS_2022_I2037744 13000 0.90 +1.2 2.1
ATLAS_2022_I2077575 13000 1.6 -0.20 1.4*
CMS_2018_I1703993 13000 42 -1.0 41
CMS_2021_I1901295 13000 19 +4.0 23
Mean rapidity
 ATLAS_2019_I1750330 13000 7.7 +0.70 8.4
ATLAS_2020_I1801434 13000 3.3 +0.20 3.5
ATLAS_2022_I2077575 13000 1.9 -0.40 1.5*
ttbarej.ht
 ATLAS_2022_I2037744 13000 1.5 +1.9 3.4
ttbarej.m
 CMS_2021_I1901295 13000 17 0 17
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.0 +0.40 4.4
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 3.9 +0.60 4.5
Cross sections
 ATLAS_2022_I2037744 13000 4.8 +6.2 11
ATLAS_2022_I2077575 13000 7.8 -3.4 4.4
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.