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 +0.20 120 +0.34 120
23 0 23 0 23
2.7 -0.32 2.8 -0.20 2.7
pp/ppbar → bb 86 +21 110 +56 160
13 +1.0 14 +3.0 17
1.7 -1.3 1.5 -0.031 1.7
pp/ppbar → Elastic 20 +0.068 20 +1.2 21
17 0 17 0 17
14 +0.0011 14 +0.0037 14
pp/ppbar → Jets 370 +25 360 +220 390
130 0 130 +60 190
0.00013 -86 0.000050 -2.0 0.00017
pp/ppbar → Soft QCD (inelastic) 150 +16 160 +67 230
4.6 +0.20 4.8 +0.70 5.5
0.0029 -3.8 0.0015 -3.4 0.00032
pp/ppbar → Soft QCD (nsd only) 13 +0.55 13 +0.61 14
2.7 0 2.7 0 2.7
0.054 -0.57 0.037 -0.22 0.050
pp/ppbar → Total σ 2.0 0 2.0 +0.0013 2.0
2.0 0 2.0 0 2.0
2.0 0 2.0 +0.0013 2.0
pp/ppbar → Top (t-channel) 2.6 +0.18 2.8 +0.28 2.6
0.94 +0.060 1.00 0 1.0
0.094 -0.071 0.098 -0.14 0.11
pp/ppbar → Top (all) 1.9
? ? 0.76
0.37
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 74 +7.9 82 +46 110
4.9 +0.100 5.0 +1.5 6.5
0.0076 -3.0 0.0071 -2.5 0.0041
pp/ppbar → Underlying Event 20 +3.2 8.2 +1.5 21
1.7 -0.20 1.5 +0.30 1.8
0.076 -1.2 0.074 -3.0 0.071
pp/ppbar → W+Jet 8.6 +0.66 7.5 +1.2 8.6
4.0 -0.30 3.7 +0.20 3.9
1.9 -1.1 1.3 -0.055 1.1
pp/ppbar → W 15 +2.1 13 +4.3 13
3.8 -0.40 3.4 +0.30 3.7
0.34 -3.9 0.40 -2.8 0.52
pp/ppbar → WW 53 +0.47 52 +1.4 53
20 0 20 0 20
0.10 -1.7 0.10 -0.30 0.10
pp/ppbar → Z+Jet 370 +50 370 +290 460
140 0 140 +50 190
0.32 -47 0.20 -0.77 0.18
pp/ppbar → Z (Drell-Yan) 40 +38 39 +33 250
9.5 -0.100 9.4 +1.6 11
0.25 -5.2 0.081 -38 0.14

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 12221 histograms.