Generator / tune

Pythia 8 (AU2) 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
pp/ppbar → 4-lepton 120 +0.28 120 +1.7 120
23 -1.0 22 +1.0 23
5.9 -1.9 5.6 -0.046 6.0
pp/ppbar → bb 19 +2.6 48 +30 78
5.1 +4.1 9.2 +2.8 12
0.22 -0.29 0.22 -0.48 0.23
pp/ppbar → Elastic 19 0 19 +2.1 21
16 0 16 +1.0 17
14 -0.090 14 +0.0093 14
pp/ppbar → Jets 290 +68 320 +220 380
87 -9.0 78 +92 170
0.00044 -72 0.00029 -13 0.00045
pp/ppbar → Soft QCD (inelastic) 74 +50 120 +97 220
4.3 +0.60 4.9 +0.90 5.8
0.0035 -7.2 0.0035 -2.8 0.0035
pp/ppbar → Soft QCD (nsd only) 14 +2.2 13 +1.1 14
2.6 0 2.6 0 2.6
0.039 -1.2 0.048 -0.35 0.056
pp/ppbar → Total σ 2.0 +0.0029 2.0 +0.0025 2.0
2.0 0 2.0 0 2.0
2.0 +0.0029 2.0 +0.0025 2.0
pp/ppbar → Top (t-channel) 2.4 +0.64 2.3 +0.29 2.6
0.71 +0.070 0.78 +0.020 0.80
0.034 -0.14 0.085 -0.32 0.053
pp/ppbar → Top (all) 0.54 1.1
0.54 ? 0.70
0.54 0.35
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 45 +27 47 +70 110
4.2 +0.40 4.6 +2.4 7.0
0.0075 -8.3 0.0058 -13 0.0054
pp/ppbar → Underlying Event 19 +3.8 18 +5.0 21
1.8 0 1.8 +0.100 1.9
0.12 -3.8 0.11 -5.8 0.063
pp/ppbar → W+Jet 6.7 +1.4 7.8 +3.0 9.0
2.6 +0.70 3.3 +0.10 3.4
0.72 -1.7 0.97 +0.030 0.62
pp/ppbar → W 25 +0.58 19 +2.9 31
4.8 -1.0 3.8 +1.4 5.2
1.1 -2.8 1.1 -7.8 1.0
pp/ppbar → WW 53 +4.8 53
? 19 +1.0 20
0.14 -0.71 0.10
pp/ppbar → Z+Jet 330 +66 330 +210 390
96 +4.0 100 +70 170
0.33 -64 0.14 -1.3 0.22
pp/ppbar → Z (Drell-Yan) 29 +36 37 +39 58
6.8 +0.80 7.6 -0.30 7.3
0.14 -6.6 0.098 -36 0.078

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 11394 histograms.