Generator / tune

Pythia 8 (4Cx) versions validation

Versions:

2>
incl. 5% "theory uncertainty" on all points
max worst max worst max
8.308 <Δ> 8.313 <Δ> 8.315
min best min best min
pp/ppbar → 4-lepton 120 120
23 23
5.9 6.1
pp/ppbar → bb 6,100 +100 6,100 +6,200 12,000
1,200 0 1,100 1,100 2,200
0.19 -18 0.21 +0.0055 0.23
pp/ppbar → Elastic 38 35
36 34
34 34
pp/ppbar → Jets 10,000,000 +14,000 14,000
6,800 -6,800 25
0.00015 -10,000,000 0.00058
pp/ppbar → Soft QCD (inelastic) 660
16
0.026
pp/ppbar → Soft QCD (nsd only) 760
43
0.14
pp/ppbar → Total σ 2.7 0 2.7
2.7 0 2.7
2.7 0 2.7
pp/ppbar → Top (t-channel) 4.4
1.3
0.072
pp/ppbar → Top (all) 0.90
0.60
0.23
pp/ppbar → Top (parton level)
pp/ppbar → Top (tt) 120 150
8.3 9.2
0.0058 0.0073
pp/ppbar → Underlying Event 44 45
2.2 2.6
0.048 0.040
pp/ppbar → W+Jet 200 +7.9 140 +180 500
42 -19 23 +60 83
2.4 -49 0.95 +2.5 5.0
pp/ppbar → W 21 64
8.2 23
0.28 0.61
pp/ppbar → WW 34 34
19 18
0.49 0.44
pp/ppbar → Z+Jet 1,100
14
0.031
pp/ppbar → Z (Drell-Yan) 980,000,000
3,300,000
0.11

Legend: [ χ2 < 1 ] / [ 1 ≤ χ2 < 4 ] / [ 4 ≤ χ2 ]

(click on number in the table cell to see individual observables)

The page data is based on 7172 histograms.