Question about decay channels in MadWidth
Asked by
Alessandro Davoli
Hi,
I'm using MadWidth to study the branching ratio of a model I wrote.
The model is SM + a Z' boson and two fermions, x1 and x2.
Z' is coupled to quarks, x2 and x1, so that the production channel for x2 and x1 is something like p p > zp > x1~ x2.
x1 and x2 are also directly coupled to SM quarks through an effective, D=6, operator.
When I execute "compute_widths x2", only the channel x2 > zp x1, (zp > q~ q) seems to be taken into account (the only displayed diagram for x2 decay in the temp file contains the exchange of Z').
I have two questions about this:
- is it possible to exclude some decay channels from MadWidth? (I'd like to exclude Z' in the decay)
- can MadWith deal with effective operators for decay?
Thanks!
Alessandro
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