Generator / tune

Pythia 8 (A2M) 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 +0.86 120 +0.64 120
21 +1.0 22 0 22
2.2 -0.27 2.7 -0.26 3.0
pp/ppbar → bb 28 +3.0 19 +2.6 110
6.9 -1.8 5.1 +8.9 14
0.37 -0.51 0.39 -0.033 0.37
pp/ppbar → Elastic 19 +0.035 19 +2.0 21
16 0 16 +1.0 17
14 0 14 +0.0090 14
pp/ppbar → Jets 300 +71 320 +230 380
86 -1.0 85 +85 170
0.00048 -68 0.00032 -4.0 0.00059
pp/ppbar → Soft QCD (inelastic) 150 +18 120 +120 240
5.1 +0.20 5.3 +1.1 6.4
0.0035 -23 0.0035 -3.7 0.0035
pp/ppbar → Soft QCD (nsd only) 17 +5.0 16 +3.0 17
3.0 +0.10 3.1 +0.20 3.3
0.051 -1.2 0.050 -0.88 0.043
pp/ppbar → Total σ 2.0 0 2.0 +0.0024 2.0
2.0 0 2.0 0 2.0
2.0 0 2.0 +0.0024 2.0
pp/ppbar → Top (t-channel) 2.6 +0.52 2.7 +0.12 2.6
0.72 +0.070 0.79 -0.010 0.78
0.081 -0.16 0.055 -0.44 0.055
pp/ppbar → Top (all) 1.1
? ? 0.64
0.24
pp/ppbar → Top (parton level)
? ? ?
pp/ppbar → Top (tt) 47 +20 63 +68 130
3.9 +0.50 4.4 +2.8 7.2
0.0042 -7.3 0.0057 -2.0 0.0038
pp/ppbar → Underlying Event 23 +0.68 23 +5.6 27
1.9 0 1.9 -0.100 1.8
0.12 -9.8 0.13 -2.8 0.081
pp/ppbar → W+Jet 7.5 +0.61 6.9 +2.5 9.4
3.2 -0.70 2.5 +0.70 3.2
0.86 -0.56 1.5 -0.16 0.48
pp/ppbar → W 29 +1.7 30 +1.1 23
4.6 0 4.6 +0.10 4.7
1.4 -1.6 1.3 -7.5 1.2
pp/ppbar → WW 53 +1.3 52 +3.2 53
19 0 19 +1.0 20
0.11 -0.86 0.097 -0.19 0.10
pp/ppbar → Z+Jet 330 +6.5 330 +230 390
96 0 96 +74 170
0.31 -63 0.31 -1.6 0.30
pp/ppbar → Z (Drell-Yan) 26 +14 28 +25 42
6.8 -0.20 6.6 +1.1 7.7
0.12 -4.3 0.22 -4.2 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 11518 histograms.