error for reweighting with squared syntax

[Eleni Vryonidou]

Hi Olivier,

I was trying to reweight a tree-level sample generated like this:

import model EWdim6
generate p p > w+ w- NP=0 QED=2
output wwbug

with the reweight card:

change process p p > w+ w- QED=2 NP=2 NP^2==2
launch
/Users/evryonidou/mg5amcnlo/wwbug/Cards/param_card.dat

and the code crashes because it is looking for MadLoop files, when everything is tree-level. I attach the reweight.log.

Do you know why that happens?

Thanks,

Eleni

[Olivier Mattelaer (olivier-mattelaer)]

Hi,

It does not crash because of the loop at all.
Those are just debug statement. Nothing to worry about.

The problem seems that the interference output does not have the correct formatting
for the re-weighting.

They miss the helicity information. Unfortunately bypassing the helicity by helicity re-weighitng is not enough...

I will put that on my todo list but this will not be fixed soon.

Cheers,

Olivier

On 16 Apr 2018, at 12:02, Eleni Vryonidou <<email address hidden><mailto:<email address hidden>>> wrote:

EWdim6