Generator / tune

Pythia 8 (2M) 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 +0.48 120 +0.42 120
23 0 23 0 23
4.3 -0.56 4.3 -0.26 4.3
pp/ppbar → bb 48 +0.98 46 +34 80
10 -0.40 9.6 +2.4 12
0.19 -1.8 0.19 -0.25 0.19
pp/ppbar → Elastic 20 -0.0065 19 +2.1 21
17 -1.0 16 +1.0 17
14 -1.2 14 +0.0100 14
pp/ppbar → Jets 360 +23 360 +210 390
130 0 130 +60 190
0.00014 -23 0.000087 -2.4 0.00055
pp/ppbar → Soft QCD (inelastic) 160 +3.4 160 +79 240
7.6 -0.50 7.1 +1.5 8.6
0.0035 -20 0.0035 -2.6 0.0035
pp/ppbar → Soft QCD (nsd only) 36 +0.61 31 +1.7 38
7.0 -0.30 6.7 +1.0 7.7
0.22 -0.43 0.25 -0.73 0.20
pp/ppbar → Total σ 2.0 +0.00029 2.0 +0.00100 2.0
2.0 0 2.0 0 2.0
2.0 +0.00029 2.0 +0.00100 2.0
pp/ppbar → Top (t-channel) 2.6 +0.18 2.7 +0.17 2.7
0.58 +0.050 0.63 +0.040 0.67
0.015 -0.17 0.040 -0.064 0.041
pp/ppbar → Top (all) 1.4 1.0
1.4 ? 0.64
1.4 0.11
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 14 +4.4 13 +13 25
1.9 +0.10 2.0 +0.50 2.5
0.0062 -3.9 0.0029 -2.6 0.0030
pp/ppbar → Underlying Event 43 +5.6 45 +11 51
6.8 +0.20 7.0 +1.1 8.1
0.15 -1.3 0.094 -0.41 0.10
pp/ppbar → W+Jet 7.5 +0.74 7.6 +2.6 10
3.7 +0.40 4.1 +0.30 4.4
2.5 -0.27 2.6 -0.013 2.6
pp/ppbar → W 44 +5.3 33 +2.8 43
8.2 -1.3 6.9 +2.6 9.5
0.29 -1.00 0.27 -3.7 0.31
pp/ppbar → WW 52 +0.65 53 +1.3 53
20 0 20 0 20
0.098 -0.62 0.094 -0.41 0.11
pp/ppbar → Z+Jet 370 +23 370 +160 390
140 0 140 +50 190
0.21 -47 0.30 -2.1 0.24
pp/ppbar → Z (Drell-Yan) 34 +21 50 +20 110
8.9 +0.80 9.7 +3.3 13
0.17 -2.0 0.14 -11 0.15

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 12273 histograms.