Meaning of block loop in event generation

Asked by Hannes

Hi,

I have a quick question regarding the (now hidden) loop block in the parameter card - is this only relevant for madloop or does it also do something during normal event generation?

Cheers,
Hannes

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Olivier Mattelaer (olivier-mattelaer) said :
#1

Hi,

This is the renormalization scale and since loop piece can depend explicitly on it, it is part of the UFO model and is needed by madloop for the evaluation of a single phase-space point.
But in itself this is not part of the benchmark and therefore I have hide it to avoid confusion.

When doing integration, the handling of the scale is done via the run_card.
(and can be dynamical or fixed)

Cheers,

Olivier

> On 10 Nov 2021, at 21:10, Hannes <email address hidden> wrote:
>
> New question #699431 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/699431
>
> Hi,
>
> I have a quick question regarding the (now hidden) loop block in the parameter card - is this only relevant for madloop or does it also do something during normal event generation?
>
> Cheers,
> Hannes
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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