Generator / tune

Pythia 8 (2C) 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 +0.26 120 +1.1 120
23 0 23 0 23
6.2 -0.92 6.3 -0.21 6.1
pp/ppbar → bb 28 +0.18 19 +5.3 97
7.5 -1.9 5.6 +7.4 13
0.21 -1.7 0.22 -0.068 0.22
pp/ppbar → Elastic 19 0 19 +2.3 21
16 0 16 +1.0 17
14 -0.17 14 +0.0093 14
pp/ppbar → Jets 320 +70 320 +220 390
78 -1.0 77 +93 170
0.00016 -71 0.00091 -6.2 0.00056
pp/ppbar → Soft QCD (inelastic) 120 +7.0 110 +130 240
5.4 +0.40 5.8 +1.3 7.1
0.00055 -15 0.00015 -2.0 0.0035
pp/ppbar → Soft QCD (nsd only) 18 +1.4 18 +1.3 23
4.9 +0.20 5.1 +0.30 5.4
0.25 -0.57 0.31 -0.92 0.30
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) 2.9 +0.31 2.5 +0.37 2.5
0.77 +0.100 0.87 -0.080 0.79
0.058 -0.42 0.094 -0.27 0.032
pp/ppbar → Top (all) 1.5
? ? 0.87
0.16
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 57 +7.4 59 +50 100
5.2 +0.40 5.6 +1.9 7.5
0.00014 -5.9 0.0048 -4.7 0.0041
pp/ppbar → Underlying Event 27 +2.5 25 +13 38
4.4 -0.30 4.1 +2.0 6.1
0.17 -2.6 0.17 -2.3 0.091
pp/ppbar → W+Jet 5.5 +0.67 7.3 +1.5 7.6
2.8 +0.70 3.5 +0.20 3.7
1.4 -0.54 2.1 -0.32 1.7
pp/ppbar → W 29 +6.6 36 +1.8 5.6
5.9 +0.100 6.0 -3.1 2.9
1.2 -1.6 0.83 -0.12 1.4
pp/ppbar → WW 52 +0.99 53 +6.0 53
20 -1.0 19 +1.0 20
0.095 -4.8 0.14 -0.67 0.11
pp/ppbar → Z+Jet 310 +70 330 +190 390
93 +17 110 +60 170
0.20 -29 0.33 -0.83 0.30
pp/ppbar → Z (Drell-Yan) 47 +61 63 +22 52
13 -5.8 7.2 +4.8 12
0.42 -32 0.35 -60 0.29

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 11291 histograms.