MadGraph5_aMC@NLO

Reagrding Event generation with a particular mediator

Asked by ouseph cj

Dear Madgraph Experts,
I am using the following UFO file
https://feynrules.irmp.ucl.ac.be/attachment/wiki/LeptoQuark/vector_LQ_UFO.tar.gz

for the generation of p vl > p vl. Leptoquark and Zprime mediators are included in this UFO file. I only wish to generate a p vl > p vl process with Zprime( i don't need LQ in my process), what should be the code for that.

Thanking you with anticipation
melbin

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Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

If your Z prime is on shell, then the best syntax is
generate p vl > Zp, Zp > p vl

If it can not be on shell (but still S-Channel) and assuming that such diagram alone is gauge invariant
Generate p vl > Zp > p vl

If it is T-channel we do not have dedicated syntax
The likely option is then to use very dangerous syntax
Define notzp = all / Zp
Generate p vl > p vl / notzp

Cheers,

Olivier

> On 23 Sep 2021, at 08:30, ouseph cj <email address hidden> wrote:
>
> New question #698841 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/698841
>
> Dear Madgraph Experts,
> I am using the following UFO file
> https://feynrules.irmp.ucl.ac.be/attachment/wiki/LeptoQuark/vector_LQ_UFO.tar.gz
>
> for the generation of p vl > p vl. Leptoquark and Zprime mediators are included in this UFO file. I only wish to generate a p vl > p vl process with Zprime( i don't need LQ in my process), what should be the code for that.
>
> Thanking you with anticipation
> melbin
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
ouseph cj (ouseph444) said : 		#2

Thanks Olivier Mattelaer, that solved my question.