Cross-section of W production
I generated a cross-section of leptons production in W decays at sqrt[s] = 13 TeV:
p p > w+, w+ > e+ ve
The total cross-section is approximately 9 nb.
Next, I tried to generate cross-sections for the processes
p p > w+ j, w+ > e+ ve,
p p > w+ j j, w+ > e+ ve,
and it turned out that the total cross-section for these two processes is something like 3.4 nb which is significantly lower than the cross-section for p p > w+, w+ > ve e+.
What I'm interested in is in the relashionships between these processes in MadGraph. Am I right that the cross-section of the process p p > w+, w+ > ve e+ is the total w+ production cross-section computed before parton showering and in principle can be obtained by summing the cross-sections for the processes p p > w+ nj, w+ > ve e+, where we sum over integer n?
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- Olivier Mattelaer
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