Generator

Details for Pythia 8.306 default vs. default-CD

pp/ppbar → Z (Drell-Yan)


Observable Reference Energy χ2+5% (default) Δ χ2+5% (default-CD)
Underlying event
 <Nch> vs pTZ
 ATLAS_2019_I1736531 13000 - 1.7
Underlying event
 <pT>
 ATLAS_2019_I1736531 13000 - 2.5*
<pT> vs Nch
 CDF_2010_I849042 1960 1.9* - n/a
Transverse
 <pT> vs pTlead
 CDF_2010_I849042 1960 3.7 +1.9 5.6
Toward
 <pT> vs pTlead
 CDF_2010_I849042 1960 5.3 +2.5 7.8
Underlying event
 <pT> vs pTZ
 ATLAS_2019_I1736531 13000 - 3.4
<pT>Z vs Nch
 CDF_2010_I849042 1960 n/a - 2.0
Underlying event
 Σ(pT) vs pTZ
 ATLAS_2019_I1736531 13000 - 7.2
Underlying event
 pT spectrum
 ATLAS_2019_I1736531 13000 - 1.8*
Jet Substructure
 Splitting scale d0
 ATLAS_2017_I1589844 8000 25 -2.0 23
Jet Substructure
 Splitting scale d1
 ATLAS_2017_I1589844 8000 28 -4.0 24*
Jet Substructure
 Splitting scale d2
 ATLAS_2017_I1589844 8000 28 -2.0 26
Jet Substructure
 Splitting scale d3
 ATLAS_2017_I1589844 8000 26 -3.0 23*
Jet Substructure
 Splitting scale d4
 ATLAS_2017_I1589844 8000 26 -2.0 24*
Jet Substructure
 Splitting scale d5
 ATLAS_2017_I1589844 8000 25 -1.0 24*
Jet Substructure
 Splitting scale d6
 ATLAS_2017_I1589844 8000 24 -3.0 21*
Jet Substructure
 Splitting scale d7
 ATLAS_2017_I1589844 8000 23 -2.0 21*
Dilepton
 Δη
 ATLAS_2016_I1467454 8000 19 0 19
Dilepton
 m
 ATLAS_2019_I1725190 13000 n/a - n/a
Dilepton
 φ*η
 CMS_2019_I1753680 13000 - 26
CMS_2022_I2079374 13000 31 -1.0 30
D0_2010_I871787 1960 1.3* +0.30 1.6*
LHCB_2012_I1208102 7000 9.0 -0.30 8.7
LHCB_2021_I1990313 13000 - 11*
Dilepton
 φ*η ratio
 CMS_2022_I2079374 13000 0.94* -0.33 0.61*
ll.phiStar_norm
 ATLAS_2019_I1768911 13000 - 0.79
CMS_2019_I1753680 13000 - 0.66
Dilepton
 pT
 LHCB_2021_I1990313 13000 - 14*
Dilepton
 y
 LHCB_2021_I1990313 13000 - 18
Transverse
 Max(pT) vs pTlead
 CDF_2010_I849042 1960 8.3 +3.7 12
Toward
 Max(pT) vs pTlead
 CDF_2010_I849042 1960 10 +1.0 11
Underlying event
 Nch
 ATLAS_2019_I1736531 13000 - 2.2*
Away
 <Nch> vs pTlead
 CDF_2010_I849042 1960 1.3 -0.39 0.91
Transverse
 <Nch> vs pTlead
 CDF_2010_I849042 1960 1.2 -0.100 1.1
nch-vs-pt-trnsDif
 CDF_2010_I849042 1960 1.1 -0.16 0.94
TransMAX
 <Nch> vs pTlead
 CDF_2010_I849042 1960 1.2 0 1.2
TransMIN
 <Nch> vs pTlead
 CDF_2010_I849042 1960 2.8 -1.1 1.7
Toward
 <Nch> vs pTlead
 CDF_2010_I849042 1960 2.3 -0.50 1.8
Jet Multiplicities
 Jet multiplicity
 CMS_EWK_10_012 7000 7.7 +7.3 15
Jet Multiplicities
 Ratios of jet multiplicity
 CMS_EWK_10_012 7000 3.6 +1.5 5.1
Underlying event
 Scalar Σ(pT)
 ATLAS_2019_I1736531 13000 - 2.6*
Away
 Σ(pT) vs pTlead
 CDF_2010_I849042 1960 0.82 +0.88 1.7
Transverse
 Σ(pT) vs pTlead
 CDF_2010_I849042 1960 4.9 -1.1 3.8
sumpt-vs-pt-trnsDif
 CDF_2010_I849042 1960 2.9 +2.4 5.3
TransMAX
 Σ(pT) vs pTlead
 CDF_2010_I849042 1960 3.7 +0.70 4.4
TransMIN
 Σ(pT) vs pTlead
 CDF_2010_I849042 1960 8.6 -4.7 3.9
Toward
 Σ(pT) vs pTlead
 CDF_2010_I849042 1960 6.3 -0.50 5.8
z.m
 PHENIX_2019_I1672015 200 230,000,000 -51,000,000 180,000,000
pT Z
 CDF_2000_I505738 1800 11 0 11
CDF_2012_I1124333 1960 10 +1.0 11
CMS_2019_I1753680 13000 - 20*
CMS_2022_I2079374 13000 24 -1.0 23
D0_2010_I856972 1960 3.2 +0.100 3.3
PHENIX_2019_I1672015 200 93,000,000 +36,000,000 130,000,000
z.pt._z.pt
 CMS_2022_I2079374 13000 0.56* +0.23 0.79*
z.pt_norm
 ATLAS_2011_I917931 7000 0.60 +0.15 0.75
ATLAS_2019_I1768911 13000 - n/a
CMS_2019_I1753680 13000 - 0.94*
D0_2010_I856972 1960 0.61 +1.2 1.8
y Z
 ATLAS_2016_I1467454 8000 20 0 20
CMS_2019_I1753680 13000 - 45
LHCB_2012_I1208102 7000 11 +3.0 14
z.y_norm
 CMS_2019_I1753680 13000 - 0.49

* 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 624 histograms.