MadWeight and particle width calculation

Hi Stephen,

The correct solution should be to write the following:
> set param_card mass 32 200.
> set param_card mass 18 300.
> set param_card frblock 1 1.8
> set param_card frblock 2 0.6
set param_card width 32 Auto

But looks like the reweight module does not understand the “Auto” command for the width.
So for the moment the solution is to compute first the value of the width and then pass the numerical value in the card.
I will fix this behaviour for the next version.

Cheers,

Olivier

You can replace the
On 24 Mar 2015, at 05:01, Stephen Mrenna <email address hidden> wrote:

> New question #264092 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/264092
>
> I tested the reweight procedure
> (https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/Reweight)
> for a Z' model.
>
> I was able to modify parameters, but I did not believe that the width of
> the Z' was recalculated (the Z' appears as a propagator in this model).
>
> My experience with setting parameters and calculating the width of
> a particle comes from gridpack generation. In particular, the gridpack
> supports a customize card, which can take the following
> (example) syntax:
> set param_card mass 32 200.
> set param_card mass 18 300.
> set param_card frblock 1 1.8
> set param_card frblock 2 0.6
> compute_widths 32
>
> Is there a way to adopt this same syntax for the reweight procedure?
>
> --
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