Convergence issue with flavor summation over charge-conjugated processes
Dear Whizard authors,
I have a question regarding the process ee->qq e nu_e which does not converge if I use automatic flavor summation for the quarks.
I tried it in two ways:
1. process proc_qqlnu_e = e1, E1 => u:U:c:C, d:D:s:S:b:B , e1:E1, n1:N1
2. process proc_qqlnu_e = e1, E1 => (u:c, D:S:B , e1:E1, n1:N1 ) + (U:C, d:s:b , e1:E1, n1:N1)
In both cases, the same (correct) channels are allowed, so the flavor summation itself is not the issue. But it seems that the phase spaces are different and in case 1 the integration does not converge, while in case 2 it does.
I am wondering if this has a known reason. How can I know in the future in which cases flavor summation can be used in this way and in which cases not?
You can find a minimum working example here: https:/
Cheers,
Ulrike
Question information
- Language:
- English Edit question
- Status:
- Solved
- For:
- WHIZARD Edit question
- Assignee:
- Wolfgang Kilian Edit question
- Last query:
- Last reply: