MadGraph5_aMC@NLO

events with weights larger than max_weight in Madspin

Asked by Josh Bendavid

Do I need to worry if I have a small number of events with weight larger than max_weight in Madspin?

INFO: Number of events with weights larger than max_weight: 1

Or is this ok?

Thanks,
Josh

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi Josh,

Yes and no.

This shows that the maximum weight is under-estimated which can means that you can expect some bias in the final distribution.
Now the fact that you have only one means that this is usually fine. This can be related to some off-shell events which breaks the universality of the upper-bound.

Cheers,

Olivier

On Apr 14, 2014, at 1:26 AM, Josh Bendavid <email address hidden> wrote:

> New question #246958 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/246958
>
> Do I need to worry if I have a small number of events with weight larger than max_weight in Madspin?
>
> INFO: Number of events with weights larger than max_weight: 1
>
> Or is this ok?
>
> Thanks,
> Josh
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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