Generator / tune

Pythia 8 (2C) 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 +8.5 130 +0.12 120
20 +1.0 21 -1.0 20
0.22 +0.00025 0.22 -9.5 0.22
pp/ppbar → Elastic 21 +0.00020 21 +0.0065 21
17 0 17 0 17
14 -0.0031 14 -0.00020 14
pp/ppbar → Jets 460 +8.4 470 +1.5 470
6.8 +0.10 6.9 -0.10 6.8
0.00025 -1.4 0.00035 -8.0 0.00036
pp/ppbar → Soft QCD (inelastic) 270 +17 280 +1.6 270
9.8 +0.20 10 -0.20 9.8
0.0035 -1.7 0.0035 -17 0.0035
pp/ppbar → Soft QCD (nsd only) 25 +0.069 24 +0.32 25
5.9 +0.100 6.0 0 6.0
0.33 -0.14 0.31 -1.1 0.29
pp/ppbar → Total σ 2.0 +0.000020 2.0 -0.000020 2.0
2.0 0 2.0 0 2.0
2.0 +0.000020 2.0 -0.000020 2.0
pp/ppbar → tt 1.8 +0.026 1.8 +0.099 1.8
0.34 0 0.34 0 0.34
0.0030 -0.017 0.0036 -0.050 0.0027
pp/ppbar → Underlying Event 690 +6.8 690 +1.6 690
31 -2.0 29 +2.0 31
0.081 -1.8 0.082 -7.1 0.085
pp/ppbar → W+Jet 5.6 +1.6 6.4 +0.023 8.2
3.5 +0.10 3.6 +0.20 3.8
1.9 -0.12 1.8 -1.3 1.9
pp/ppbar → W 17 +8.2 26 +5.0 31
5.2 +0.20 5.4 +0.60 6.0
1.5 -0.94 1.5 -2.0 1.5
pp/ppbar → Z+Jet 19 +3.3 21 +0.16 19
5.0 +0.30 5.3 -0.40 4.9
1.2 -0.16 1.2 -2.8 1.3
pp/ppbar → Z (Drell-Yan) 13 +0.34 13 +0.86 13
2.7 0 2.7 0 2.7
0.91 -0.94 0.49 -0.63 0.81

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 2840 histograms.