Generator / tune

Pythia 8 (DL) 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 +0.54 120 +1.3 120
23 0 23 0 23
2.8 -0.44 3.0 -0.40 2.8
pp/ppbar → bb 19 +0.42 68 +57 120
6.8 +4.2 11 +5.0 16
1.6 -1.4 1.5 -0.43 1.7
pp/ppbar → Elastic 19 +0.22 19 +1.8 21
16 0 16 +1.0 17
14 0 14 +0.0089 14
pp/ppbar → Jets 320 +8.5 290 +230 380
87 -9.0 78 +82 160
0.00028 -71 0.00049 -4.1 0.00012
pp/ppbar → Soft QCD (inelastic) 73 +4.3 130 +82 210
3.9 +0.40 4.3 +0.90 5.2
0.00023 -5.0 0.00017 -4.3 0.00096
pp/ppbar → Soft QCD (nsd only) 13 +1.1 13 +0.53 13
2.7 -0.20 2.5 +0.30 2.8
0.043 -0.69 0.076 -0.65 0.042
pp/ppbar → Total σ 2.0 0 2.0 +0.0025 2.0
2.0 0 2.0 0 2.0
2.0 0 2.0 +0.0025 2.0
pp/ppbar → Top (t-channel) 2.6 +0.75 2.5 +0.27 2.7
0.94 +0.16 1.1 -0.10 1.0
0.064 -0.15 0.071 -0.25 0.060
pp/ppbar → Top (all) 1.2
? ? 0.67
0.19
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 52 +5.3 47 +56 100
4.2 -0.10 4.1 +2.1 6.2
0.0019 -11 0.0028 -4.5 0.0051
pp/ppbar → Underlying Event 11 +1.9 18 +3.1 23
1.3 +0.30 1.6 +0.30 1.9
0.090 -1.2 0.094 -2.3 0.066
pp/ppbar → W+Jet 5.6 +0.50 5.8 +4.2 9.1
3.1 +0.50 3.6 +0.40 4.0
1.1 -0.69 2.1 -0.29 1.00
pp/ppbar → W 14 +1.5 12 +3.9 16
3.1 +0.70 3.8 +0.50 4.3
0.30 -1.2 0.19 -0.25 0.42
pp/ppbar → WW 53 +0.25 53 +2.5 53
20 0 20 0 20
0.12 -3.0 0.095 -0.37 0.10
pp/ppbar → Z+Jet 330 +61 330 +280 380
99 -5.0 94 +76 170
0.19 -67 0.31 -5.2 0.39
pp/ppbar → Z (Drell-Yan) 37 +5.9 35 +36 51
8.9 +2.1 11 -1.6 9.4
0.11 -11 0.27 -4.5 0.081

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 11462 histograms.