MadGraph5_aMC@NLO

PDF reweighting at NLO

Asked by Richard Ruiz

Hi Folks,

I want to give some semblance of caring for the environment and take one, very large set of NLO+PS events (I still have the ``NLO'' LHE file) generated with one PDF, re-weight the events, and get a second set of NLO+PS events that assumes a second PDF.

How can I do this? Presumably I will have to re-shower, but this is fine.

Now, is it also possible to re-weight ``NLO'' LHE events assuming a second parton shower?

best,
richard

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Did you generate your sample with "store_reweight_info" set on True?
If yes you can do
./bin/aMCatNLO systematics run_01

Cheers,

Olivier

> On 20 Feb 2020, at 02:52, Richard Ruiz <email address hidden> wrote:
>
> New question #688884 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/688884
>
> Hi Folks,
>
> I want to give some semblance of caring for the environment and take one, very large set of NLO+PS events (I still have the ``NLO'' LHE file) generated with one PDF, re-weight the events, and get a second set of NLO+PS events that assumes a second PDF.
>
> How can I do this? Presumably I will have to re-shower, but this is fine.
>
> Now, is it also possible to re-weight ``NLO'' LHE events assuming a second parton shower?
>
> best,
> richard
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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