Interaction order of NP vs QED
Asked by
Nishita
Hi Olivier and MG5 team,
I have a question about how Madgraph calculates diagrams for models implemented via Feynrules. We have a model with a new physics interaction proportional to lambda * vev^4 where lambda has InteractionOrder -> {NP, 1}. However, I find a double counting of Feynman diagrams where one corresponds NP=1 QED=0 and another to NP=0 QED=-2. The interaction order hierarchy is set as
M$InteractionO
{QCD, 1},
{NP, 1},
{QED, 2}
};
How can I prevent the double counting?
Thanks,
Nishita.
Question information
- Language:
- English Edit question
- Status:
- Answered
- Assignee:
- No assignee Edit question
- Last query:
- Last reply:
Can you help with this problem?
Provide an answer of your own, or ask Nishita for more information if necessary.
To post a message you must log in.