Double counting, how to avoid
Asked by
Xiaojun Yao
Dear Sir/Madam,
I tried to generate the event: p p > g g, g > b b~, g > g
Madgraph gives me four diagrams with initial gluons. For the first two, the b-bbar comes only from one of the two outgoing gluons while for the last two, they are the same except the b-bbar coming from either outgoing gluon. See the diagrams:
http://<email address hidden>
There is a inconsistency in the b-bbar vertex. I can generate another event p p > g g, g > g, g > b b~
but then there will be double counting. Can you tell me how to get the correct non-double counting but all diagrams?
Many thanks,
Xiaojun
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- Olivier Mattelaer
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