How to set parameters depending on the values of other parameters

Hi,

> in response to the FAQ https://answers.launchpad.net/mg5amcnlo/+faq/2186 regarding how to script mg5, is there a way to set a parameter depending on the value adopted for another parameter during a run?

The general answer is no.

> For instance, when scanning on the mass of a particle decaying to two leptons, I would like to set cut on the dilepton invariant mass range to Mass ± 3 Width of the decaying particle after madgraph computed the width of the latter.

For this you can use the bwcutoff to be set at 3 (this is available only at LO)
You need then to use syntax like
Generate p p > X Z, Z > l+ l-

Cheers,

Olivier

> On 16 Apr 2017, at 13:24, Luca <email address hidden> wrote:
>
> New question #620891 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/620891
>
> Hello,
>
> in response to the FAQ https://answers.launchpad.net/mg5amcnlo/+faq/2186 regarding how to script mg5, is there a way to set a parameter depending on the value adopted for another parameter during a run?
>
> For instance, when scanning on the mass of a particle decaying to two leptons, I would like to set cut on the dilepton invariant mass range to Mass ± 3 Width of the decaying particle after madgraph computed the width of the latter.
>
> Thanks for your help and kind regards,
> L.
>
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