Generator / tune

Pythia 8 (no FSR) 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 +0.40 120 +0.62 120
23 0 23 0 23
4.7 -0.74 4.4 -0.23 4.6
pp/ppbar → bb 18 +0.16 57 +34 91
6.3 +2.7 9.0 +3.0 12
1.8 -2.1 1.8 -0.096 1.8
pp/ppbar → Elastic 19 -0.011 17 +3.2 21
16 -1.0 15 +2.0 17
14 -1.8 14 +0.020 14
pp/ppbar → Jets 1,900 +220 1,900 +1,000 2,400
130 +10 140 +70 210
0.058 -230 0.084 -3.8 0.079
pp/ppbar → Soft QCD (inelastic) 130 +5.4 70 +28 210
5.7 -0.10 5.6 +2.0 7.6
0.0035 -4.7 0.0035 -8.0 0.0035
pp/ppbar → Soft QCD (nsd only) 15 +1.1 15 +1.3 16
4.2 0 4.2 +0.20 4.4
0.089 -1.1 0.029 -0.47 0.090
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) 3.2 +0.56 3.2 +0.12 3.0
0.89 +0.050 0.94 -0.050 0.89
0.071 -0.19 0.11 -0.27 0.062
pp/ppbar → Top (all) 22
? ? 8.3
1.3
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 56 +6.4 56 +54 110
4.2 0 4.2 +2.1 6.3
0.044 -7.8 0.0025 -2.1 0.0017
pp/ppbar → Underlying Event 40 +8.5 42 +24 59
7.4 +0.40 7.8 +3.2 11
0.19 -4.7 0.11 -1.2 0.11
pp/ppbar → W+Jet 51 +0.78 50 +9.3 60
28 0 28 +2.0 30
8.5 -3.2 7.8 -0.27 11
pp/ppbar → W 24 +1.2 20 +1.5 14
3.5 -0.40 3.1 0 3.1
0.47 -4.1 0.43 -5.3 0.68
pp/ppbar → WW 57 +0.65 57 +2.8 56
18 0 18 0 18
0.35 -0.87 0.38 -1.1 0.33
pp/ppbar → Z+Jet 260 +56 270 +190 340
67 +7.0 74 +56 130
0.22 -20 0.45 -1.1 0.55
pp/ppbar → Z (Drell-Yan) 66 +8.4 62 +20 66
13 -2.0 11 +4.0 15
0.37 -9.8 0.20 -1.00 0.27

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 10294 histograms.