Generator / tune

Pythia 8 (Vincia) versions validation

Versions:

2>
incl. 5% "theory uncertainty" on all points
max worst max worst max
8.306 <Δ> 8.307 <Δ> 8.308
min best min best min
ee → ee : γ*/Z (hadronic) 15 +1.9 54 +3.9 220
1.3 +0.100 1.4 +0.80 2.2
0 -1.3 0.0000033 -1.9 0.00036
pp/ppbar → 4-lepton 120 +0.47 120 +0.40 120
23 0 23 0 23
3.0 -0.33 2.9 -0.18 3.0
pp/ppbar → bb 10 +1.4 91 +57 150
5.3 +6.7 12 +5.0 17
1.3 -0.11 1.6 -0.54 1.7
pp/ppbar → Elastic 17 +0.042 17 +4.0 21
15 0 15 +2.0 17
14 0 14 +0.020 14
pp/ppbar → Jets 310 +70 280 +220 380
76 -5.0 71 +89 160
0.0015 -74 0.0021 -4.4 0.00096
pp/ppbar → Soft QCD (inelastic) 120 +28 140 +170 310
12 +1.0 13 +7.0 20
0.037 -11 0.026 -0.32 0.039
pp/ppbar → Soft QCD (nsd only) 73 +2.7 75 +3.3 78
9.0 +0.60 9.6 +1.4 11
0.17 -1.1 0.19 -1.2 0.17
pp/ppbar → Total σ 2.0 -0.0029 2.0 +0.0053 2.0
2.0 0 2.0 0 2.0
2.0 -0.0029 2.0 +0.0053 2.0
pp/ppbar → Top (t-channel) 2.3 +0.12 2.3 +0.51 2.5
0.86 -0.030 0.83 +0.13 0.96
0.015 -0.33 0.013 -0.063 0.065
pp/ppbar → Top (all) 0.90
? ? 0.68
0.22
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 38 +20 55 +50 100
6.6 +1.2 7.8 +2.2 10
0.0075 -5.1 0.00039 -8.3 0.0045
pp/ppbar → Underlying Event 150 +42 58 +16 81
13 -5.7 7.3 +1.8 9.1
0.12 -150 0.14 -49 0.090
pp/ppbar → W+Jet 5.5 +1.5 5.7 +2.6 6.5
2.9 -0.20 2.7 +0.60 3.3
1.7 -0.58 1.5 +0.13 1.1
pp/ppbar → W 20 +0.21 17 +1.4 6.6
6.6 +0.70 7.3 -2.6 4.7
0.82 -2.5 0.80 -0.25 2.2
pp/ppbar → WW 61 +2.4 62 +2.0 60
22 0 22 0 22
0.071 -1.0 0.080 -1.9 0.076
pp/ppbar → Z+Jet 320 +65 320 +380 500
94 0 94 +76 170
0.31 -69 0.42 -3.4 0.32
pp/ppbar → Z (Drell-Yan) 94 +12 93 +43 430
23 0 23 +3.0 26
0.47 -21 0.35 -0.75 0.55

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 10938 histograms.