Generator / tune

Details for Pythia 6.427 358 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 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 0.19 +0.32 0.51
B jet
 η
 CMS_2018_I1703993 13000 44 -7.0 37
B jet
 pT
 CMS_2018_I1703993 13000 53 -8.0 45
bjbj.m
 CMS_2018_I1703993 13000 63 -10 53
bjbj.pt
 CMS_2018_I1703993 13000 57 -7.0 50
bjt.dphi
 ATLAS_2022_I2037744 13000 1.9 +2.0 3.9
ej.pt
 ATLAS_2022_I2037744 13000 3.0 +0.20 3.2*
pT ratio
 Extra jets
 ATLAS_2020_I1801434 13000 3.2 0 3.2
pT ratio
 Extra to leading jet
 ATLAS_2020_I1801434 13000 3.0 +0.70 3.7
pT ratio
 Extra jet to Top
 ATLAS_2020_I1801434 13000 3.6 -0.20 3.4
ΔR(extra jets)
 ATLAS_2020_I1801434 13000 1.7 +0.50 2.2*
ejej.dphi
 ATLAS_2022_I2037744 13000 0.99 +0.91 1.9
ejets.ht
 CMS_2021_I1901295 13000 14 +1.0 15
ΔR(extra, leading jet)
 ATLAS_2020_I1801434 13000 3.3 +0.80 4.1
ΔR(top, extra jet)
 ATLAS_2020_I1801434 13000 2.7 0 2.7
Jets + Veto
 Gap frac. vs Veto scale
 ATLAS_2012_I1094568 7000 0.54 -0.11 0.43
Jets + Veto
 Gap frac. vs scalar veto scale
 ATLAS_2012_I1094568 7000 0.23 -0.080 0.15
Jet mass
 Jet mass
 CMS_2017_I1518399 8000 n/a - n/a
CMS_2019_I1764472 13000 0.75 +0.45 1.2
Jet pT
 ATLAS_2014_I1304688 7000 16 0 16
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 2.2 +0.40 2.6
Jet Shapes
 Integral Jet Shape
 ATLAS_2013_I1243871 7000 0.44 -0.010 0.43
Identified Particles
 E(KS0)
 ATLAS_2019_I1746286 7000 1.5 0 1.5
Identified Particles
 η(KS0)
 ATLAS_2019_I1746286 7000 1.1 -0.13 0.97
Identified Particles
 pT(KS0)
 ATLAS_2019_I1746286 7000 1.4 +0.40 1.8
Identified Particles
 E(KS0) to E(jet) ratio
 ATLAS_2019_I1746286 7000 2.3 +0.20 2.5
Lepton η
 ATLAS_2019_I1759875 13000 33 -3.0 30
CMS_2018_I1703993 13000 27 -4.0 23
Lepton pT
 ATLAS_2019_I1759875 13000 46 -5.0 41
CMS_2018_I1703993 13000 52 -10 42
CMS_2021_I1901295 13000 12 +1.0 13
Identified Particles
 E(Λ0)
 ATLAS_2019_I1746286 7000 6.1 -0.60 5.5
Identified Particles
 η(Λ0)
 ATLAS_2019_I1746286 7000 1.2 -0.20 1.0
Identified Particles
 pT(Λ0)
 ATLAS_2019_I1746286 7000 7.2 +0.60 7.8
Δφ(lepton,jet)
 ATLAS_2019_I1718132 13000 n/a - n/a
Dilepton
 E
 ATLAS_2019_I1759875 13000 39 -5.0 34
Dilepton
 Δη
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 38 -5.0 33
Dilepton
 Δφ
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 23 -2.0 21
CMS_2018_I1703993 13000 47 -8.0 39
Dilepton
 HT
 ATLAS_2019_I1759875 13000 38 -4.0 34
Dilepton
 m
 ATLAS_2019_I1759875 13000 35 -2.0 33
CMS_2018_I1703993 13000 50 -8.0 42
Dilepton
 pT
 ATLAS_2019_I1718132 13000 n/a - n/a
ATLAS_2019_I1759875 13000 37 -4.0 33
CMS_2018_I1703993 13000 43 -7.0 36
Dilepton
 y
 ATLAS_2019_I1759875 13000 27 -3.0 24
ST(leptons, jets)
 ATLAS_2019_I1718132 13000 n/a - n/a
nch
 ATLAS_2022_I2152933 13000 2.5 -1.6 0.88
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 20 0 20
Jet Multiplicities
 Jet multiplicity
 ATLAS_2014_I1304688 7000 n/a - n/a
ATLAS_2020_I1801434 13000 8.6 +0.70 9.3
CMS_2018_I1703993 13000 40 -5.0 35
sumpt
 ATLAS_2022_I2152933 13000 2.4 -1.0 1.4
Jet Multiplicities
 Subjet multiplicity
 ATLAS_2019_I1750330 13000 n/a - n/a
Pouttop
 ATLAS_2019_I1750330 13000 7.2 +0.40 7.6
ATLAS_2020_I1801434 13000 5.8 -0.20 5.6
ATLAS_2022_I2077575 13000 3.2* -0.90 2.3*
Top pT
 ATLAS_2019_I1750330 13000 6.2* +1.0 7.2*
ATLAS_2020_I1801434 13000 4.7 -0.10 4.6
ATLAS_2022_I2037744 13000 2.6 +1.5 4.1
ATLAS_2022_I2077575 13000 1.6* -0.20 1.4*
CMS_2018_I1703993 13000 69 -5.0 64
CMS_2021_I1901295 13000 20 +3.0 23*
top.pt.ttbarRF
 CMS_2018_I1703993 13000 68 -6.0 62
pT ratio
 Top quarks
 ATLAS_2020_I1801434 13000 5.1 +0.80 5.9
Top rapidity
 ATLAS_2019_I1750330 13000 7.3 +0.70 8.0
ATLAS_2020_I1801434 13000 4.5 +0.50 5.0
ATLAS_2022_I2037744 13000 1.7* +1.4 3.1
ATLAS_2022_I2077575 13000 1.6* 0 1.6*
CMS_2018_I1703993 13000 67 -8.0 59
CMS_2021_I1901295 13000 21 +1.0 22
topej.dphi
 ATLAS_2022_I2037744 13000 2.9 +0.80 3.7
topej.m
 ATLAS_2022_I2037744 13000 1.5 +3.9 5.4
χ(ttbar)
 ATLAS_2019_I1750330 13000 8.0 +1.0 9.0
ATLAS_2020_I1801434 13000 3.9 +0.80 4.7
ATLAS_2022_I2077575 13000 2.2 +0.40 2.6*
Δφ(ttbar)
 ATLAS_2019_I1750330 13000 7.3 -0.100 7.2
ATLAS_2020_I1801434 13000 7.9 -0.30 7.6
ATLAS_2022_I2037744 13000 5.2 -0.50 4.7
ATLAS_2022_I2077575 13000 1.9 0 1.9
CMS_2018_I1703993 13000 97 -9.0 88
CMS_2021_I1901295 13000 30 0 30
Δy (ttbar)
 CMS_2016_I1430892 8000 n/a - n/a
CMS_2018_I1703993 13000 72 -9.0 63
CMS_2021_I1901295 13000 22 +4.0 26
ttbar HT
 ATLAS_2019_I1750330 13000 5.9 +0.60 6.5
ATLAS_2020_I1801434 13000 3.8 +0.70 4.5
ATLAS_2022_I2037744 13000 2.2 +0.50 2.7
ATLAS_2022_I2077575 13000 3.1 -1.6 1.5*
CMS_2021_I1901295 13000 22 - n/a
m(ttbar)
 ATLAS_2019_I1750330 13000 4.8* +1.9 6.7*
ATLAS_2020_I1801434 13000 5.2 -0.50 4.7
ATLAS_2022_I2037744 13000 1.9 - n/a
ATLAS_2022_I2077575 13000 1.9* -0.20 1.7*
CMS_2018_I1703993 13000 72 +38 110*
CMS_2021_I1901295 13000 26 +7.0 33*
Pcrossttbar
 ATLAS_2020_I1801434 13000 6.3 -0.60 5.7
ttbar pT
 ATLAS_2019_I1750330 13000 6.7 +1.0 7.7
ATLAS_2020_I1801434 13000 5.4 -0.60 4.8
ATLAS_2022_I2037744 13000 1.7 +2.8 4.5
ATLAS_2022_I2077575 13000 1.3* +0.20 1.5*
CMS_2018_I1703993 13000 63 -6.0 57
CMS_2021_I1901295 13000 21 -2.0 19*
pT ratio
 ttbar to extra jet
 ATLAS_2020_I1801434 13000 4.6 +0.30 4.9
ttbar.thetaStar
 ATLAS_2022_I2077575 13000 1.9* +0.80 2.7*
CMS_2021_I1901295 13000 28 +5.0 33
Ttbar rapidity
 ATLAS_2019_I1750330 13000 6.7 +0.70 7.4
ATLAS_2020_I1801434 13000 3.0 +0.70 3.7
ATLAS_2022_I2037744 13000 1.6 +2.7 4.3
ATLAS_2022_I2077575 13000 1.4 +1.0 2.4
CMS_2018_I1703993 13000 61 -7.0 54
CMS_2021_I1901295 13000 25 +5.0 30
Mean rapidity
 ATLAS_2019_I1750330 13000 9.8 0 9.8
ATLAS_2020_I1801434 13000 3.5 +1.4 4.9
ATLAS_2022_I2077575 13000 2.2 +0.20 2.4
ttbarej.ht
 ATLAS_2022_I2037744 13000 2.1 +1.3 3.4
ttbarej.m
 CMS_2021_I1901295 13000 21 +3.0 24
pT ratio
 W to b
 ATLAS_2020_I1801434 13000 4.6 +0.60 5.2
pT ratio
 W to top
 ATLAS_2020_I1801434 13000 4.6 +0.40 5.0
Cross sections
 ATLAS_2022_I2037744 13000 9.1 +17 26
ATLAS_2022_I2077575 13000 6.4 -0.80 5.6
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.