MadGraph5_aMC@NLO

How to consider Standard Model process with BSM model

Asked by Jeff Asaf Dror

Suppose I am considering the Standord Model background to the process, p p > e- e+ j j, in for example, the mssm model. Is it possible to tell madgraph to calculate only diagrams with Standard Model particles but still work in the mssm? I'm envisioning something along the lines of

      generate p p > e- e+ j j SM=True

I found that for other models one can write NP=0, but I don't think this coupling order is defined in the mssm.

I am asking this because in the model I'm using (rpvmssm) I get a huge amount of diagrams for what should be a relativlty simple process due to all the new couplings. I'd like to do the compute the Standard Model background and my actual decay chain of interest (which also produces a e- e+ jj signal) in one launch if possible.

Question information

Language:
English Edit question
Status:
Answered
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Last query:
Last reply:
Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said : 		#1

hi Jeff,

Such syntax are actually very dangerous and too model specific to be include in MadGraph.
So two solution:
1) use the sm model
2) use a more dangerous approach (which I think is fine in your case)
define smpart = g u c d s u~ c~ d~ s~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t b t~ b~ z w+ h1 w- ta- ta+
define mssmpart = all / smpart
generate p p > e- e+ j j / mssmpart

This will veto all particles which is not SM to be present in the generated diagram which therefore should correspond to the SM contribution.

Cheers,

Olivier

Can you help with this problem?

Provide an answer of your own, or ask Jeff Asaf Dror for more information if necessary.

To post a message you must log in.