Generator / tune

Pythia 8 (CD) versions validation

Versions:

<χ2>
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 +0.44 120 +2.3 120
23 -1.0 22 +1.0 23
2.6 -2.0 2.6 -0.094 2.7
pp/ppbar → bb 27 +0.86 19 +2.2 140
7.8 -1.2 6.6 +9.4 16
1.7 -0.67 1.7 -0.30 1.7
pp/ppbar → Elastic 17 +1.9 19 +2.1 21
15 +1.0 16 +1.0 17
14 +0.011 14 +0.0090 14
pp/ppbar → Jets 320 +72 290 +230 380
80 +2.0 82 +88 170
0.00023 -67 0.00017 -12 0.00016
pp/ppbar → Soft QCD (inelastic) 71 +42 110 +97 210
4.1 +0.10 4.2 +1.0 5.2
0.0014 -6.0 0.0030 -3.9 0.000048
pp/ppbar → Soft QCD (nsd only) 12 +0.98 13 +1.3 13
2.7 0 2.7 0 2.7
0.041 -0.63 0.030 -0.57 0.050
pp/ppbar → Total σ 2.0 -0.0029 2.0 +0.0053 2.0
2.0 0 2.0 0 2.0
2.0 -0.0029 2.0 +0.0053 2.0
pp/ppbar → Top (t-channel) 2.6 +0.30 2.4 +0.61 2.7
0.86 +0.090 0.95 +0.050 1.0
0.061 -0.17 0.089 -0.20 0.055
pp/ppbar → Top (all) 1.0
? ? 0.78
0.65
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 52 +14 57 +52 110
3.9 +0.30 4.2 +2.0 6.2
0.0043 -5.3 0.0063 -1.8 0.0041
pp/ppbar → Underlying Event 8.7 +1.9 23 +1.2 21
1.5 +0.70 2.2 -0.50 1.7
0.078 -3.0 0.072 -22 0.067
pp/ppbar → W+Jet 5.4 +0.85 6.3 +3.3 9.6
3.0 +0.70 3.7 +0.30 4.0
1.7 -0.19 2.0 +0.023 1.1
pp/ppbar → W 12 +2.5 5.0 +1.1 25
3.3 -0.90 2.4 +2.0 4.4
0.17 -0.53 0.26 -1.6 0.31
pp/ppbar → WW 51 +3.8 52 +3.4 53
19 0 19 +1.0 20
0.10 -1.2 0.11 -0.69 0.10
pp/ppbar → Z+Jet 330 +66 330 +260 390
100 0 100 +70 170
0.20 -66 0.37 -0.85 0.21
pp/ppbar → Z (Drell-Yan) 37 +4.3 35 +29 51
9.8 -1.0 8.8 +0.60 9.4
0.37 -6.7 0.12 -1.6 0.19

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 11474 histograms.