Generator / tune

Pythia 8 (4C) versions validation

Versions:

2>
incl. 5% "theory uncertainty" on all points
max worst max worst max
8.243 <Δ> 8.244 <Δ> 8.301
min best min best min
pp/ppbar → bb 130 +6.8 130 +0.015 130
20 +1.0 21 -1.0 20
0.20 -0.12 0.20 -7.1 0.21
pp/ppbar → Elastic 21 +0.00020 21 +0.021 21
17 0 17 0 17
14 -0.030 14 -0.00020 14
pp/ppbar → Jets 530 +14 530 +1.7 530
7.2 0 7.2 0 7.2
0.00015 -1.1 0.00012 -7.7 0.00032
pp/ppbar → Soft QCD (inelastic) 260 +17 270 +2.8 260
8.0 +0.20 8.2 -0.20 8.0
0.0035 -3.1 0.0035 -23 0.0035
pp/ppbar → Soft QCD (nsd only) 15 +0.068 15 +1.3 15
2.6 -0.10 2.5 +0.10 2.6
0.054 -0.66 0.055 -0.13 0.055
pp/ppbar → Total σ 2.0 +0.000030 2.0 -0.000040 2.0
2.0 0 2.0 0 2.0
2.0 +0.000030 2.0 -0.000040 2.0
pp/ppbar → tt 2.0 +0.074 2.0 +0.040 2.0
0.38 0 0.38 0 0.38
0.0038 -0.038 0.0039 -0.10 0.0040
pp/ppbar → Underlying Event 690 +6.2 690 +2.7 690
27 0 27 0 27
0.026 -1.2 0.027 -1.6 0.028
pp/ppbar → W+Jet 6.3 +1.2 6.7 +0.12 7.2
2.9 +0.40 3.3 +0.20 3.5
0.91 -0.067 0.94 -1.7 0.99
pp/ppbar → W 18 +4.6 18 +8.0 25
5.7 -0.30 5.4 +1.1 6.5
0.48 -2.7 1.4 -0.91 1.3
pp/ppbar → Z+Jet 19 +3.5 21 +0.094 19
4.5 +0.30 4.8 -0.100 4.7
1.2 -0.057 1.2 -3.0 0.95
pp/ppbar → Z (Drell-Yan) 13 +0.39 13 +1.00 13
2.6 +0.10 2.7 +0.100 2.8
0.81 -0.013 0.81 -0.32 0.94

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 2824 histograms.