Generator / tune

Pythia 8 (Def) versions validation

Versions:

<χ2>
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
ee → γ*/Z (hadronic) 220 +0.11 220 +0.26 220
2.2 0 2.2 0 2.2
0.0000079 -0.17 0.0000026 -0.17 0
pp/ppbar → bb 160 +5.5 170 +0.51 170
28 0 28 0 28
2.6 -0.033 2.6 -3.3 2.6
pp/ppbar → Elastic 21 +0.00020 21 +0.034 21
17 0 17 0 17
14 -0.055 14 -0.00020 14
pp/ppbar → Jets 550 +8.0 550 +0.92 550
7.1 +0.10 7.2 -0.20 7.0
0.000077 -2.1 0.000094 -9.6 0.00011
pp/ppbar → Soft QCD (inelastic) 250 +14 250 +2.4 250
7.4 +0.100 7.5 -0.100 7.4
0.0035 -2.2 0.0035 -15 0.0034
pp/ppbar → Soft QCD (nsd only) 15 +0.69 15 +0.10 15
2.7 +0.100 2.8 -0.100 2.7
0.075 -0.045 0.073 -0.59 0.071
pp/ppbar → Total σ 2.0 +0.000040 2.0 -0.000040 2.0
2.0 0 2.0 0 2.0
2.0 +0.000040 2.0 -0.000040 2.0
pp/ppbar → tt 1.9 +0.077 1.8 +0.047 1.9
0.43 +0.010 0.44 0 0.44
0.011 -0.034 0.011 -0.029 0.012
pp/ppbar → Underlying Event 690 +1.6 690 +4.6 690
26 0 26 0 26
0.074 -7.9 0.084 -1.2 0.087
pp/ppbar → W+Jet 6.2 +1.3 6.5 +0.25 5.9
3.2 +0.100 3.3 +0.20 3.5
1.0 -0.13 1.0 -1.1 1.4
pp/ppbar → W 19 +0.014 19 +2.7 16
4.7 0 4.7 +0.50 5.2
1.4 0 1.4 -2.4 1.8
pp/ppbar → Z+Jet 19 +3.1 21 +0.15 19
4.8 +0.20 5.0 -0.30 4.7
1.3 -0.30 1.3 -3.4 1.2
pp/ppbar → Z (Drell-Yan) 11 +0.31 11 +0.38 11
2.4 0 2.4 -0.10 2.3
0.58 -0.51 0.66 -0.57 0.62

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 3921 histograms.