MadGraph5_aMC@NLO

Changing the phase-space generator when calculating cross sections

Asked by Steven Jeremies

Hi,

when evaluating a given matrix element at different phase-space points, I can choose a standalone output and then change the phase-space generator by adding a new one in the check_sa.f file. Is something similar possible when calculating cross sections or am I bound to rambo?

Thanks in advance!

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

Normal cross-section computations are not based on rambo.
You can choose plenty of the parameter of how the phase-space integrator is handle
via the run_card.dat especially via hidden parameter (that you can display with the command
"update to_full")

In standalone output, the point is to have the simplest code possible such that other code can use it for their own purpose. So in that context you can replace rambo by what you need/want.

Cheers,

Olivier

> On 10 Jun 2021, at 23:41, Steven Jeremies <email address hidden> wrote:
>
> New question #697489 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/697489
>
> Hi,
>
> when evaluating a given matrix element at different phase-space points, I can choose a standalone output and then change the phase-space generator by adding a new one in the check_sa.f file. Is something similar possible when calculating cross sections or am I bound to rambo?
>
> Thanks in advance!
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Steven Jeremies (minits) said : 		#2

Thanks Olivier Mattelaer, that solved my question.