Generator / tune

Pythia 8 (4Cx) 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 +0.32 120 +1.6 120
23 0 23 0 23
6.1 -1.2 5.9 -0.20 6.1
pp/ppbar → bb 28 +1.2 28 +6.6 78
8.2 -2.8 5.4 +7.6 13
0.22 -3.9 0.20 -0.12 0.21
pp/ppbar → Elastic 19 -0.011 17 +4.4 21
16 -1.0 15 +2.0 17
14 -2.0 14 +0.020 14
pp/ppbar → Jets 320 +8.1 290 +230 380
84 -6.0 78 +92 170
0.00039 -69 0.00073 -7.5 0.00049
pp/ppbar → Soft QCD (inelastic) 93 +60 150 +81 230
4.3 +0.10 4.4 +1.2 5.6
0.0035 -4.0 0.00066 -2.9 0.0035
pp/ppbar → Soft QCD (nsd only) 14 +0.53 14 +2.0 15
2.4 +0.30 2.7 +0.100 2.8
0.096 -0.85 0.11 -0.38 0.084
pp/ppbar → Total σ 2.0 +0.0029 2.0 +0.0024 2.0
2.0 0 2.0 0 2.0
2.0 +0.0029 2.0 +0.0024 2.0
pp/ppbar → Top (t-channel) 2.4 +0.43 2.4 +0.20 2.5
0.72 +0.050 0.77 +0.020 0.79
0.071 -0.12 0.053 -0.19 0.044
pp/ppbar → Top (all) 0.37
? ? 0.37
0.37
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 62 +3.7 42 +69 110
5.1 -1.1 4.0 +3.0 7.0
0.0088 -25 0.016 -2.9 0.0043
pp/ppbar → Underlying Event 21 +2.2 20 +6.7 23
1.5 +0.30 1.8 +0.100 1.9
0.043 -2.8 0.042 -1.7 0.052
pp/ppbar → W+Jet 8.0 +0.86 8.2 +1.3 8.6
3.0 +0.70 3.7 -0.30 3.4
1.1 -0.15 1.2 -0.014 0.58
pp/ppbar → W 24 +9.6 34 +2.6 8.2
5.3 +1.0 6.3 -3.0 3.3
1.1 -0.55 0.50 -0.20 1.3
pp/ppbar → WW 52 +2.6 52 +4.6 52
19 +1.0 20 0 20
0.075 -1.4 0.11 -0.99 0.098
pp/ppbar → Z+Jet 290 +66 290 +230 390
92 +3.0 95 +75 170
0.48 -69 0.32 -1.2 0.23
pp/ppbar → Z (Drell-Yan) 33 +4.8 30 +28 200
14 -7.5 6.5 +1.8 8.3
0.61 -5.8 0.37 -3.7 0.28

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 11287 histograms.