MadGraph5_aMC@NLO

Default dynamical scale choice quivalent to LO run

Asked by Josh McFayden

Hi all,

In https://answers.launchpad.net/mg5amcnlo/+faq/2014 the different options for the default dynamical scale are given.
But I'm not sure I understand what happens when one runs a LO cross section calculation after a NLO initial production.
Is the default scale in this case the NLO default?

If yes, is there a way to select the LO default scale whilst running in the NLO production?

Best,

Josh.

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi Josh,

> Is the default scale in this case the NLO default?

Yes it is.This is consistent since this LO mode is intended for K-factor computation. So we want that LO mode to behave for all options like in NLO production.

> If yes, is there a way to select the LO default scale whilst running in the NLO production?

So far no. Implementing this sounds a lot of work and a lot validation.

Cheers,

Olivier

> On Feb 2, 2016, at 14:17, Josh McFayden <email address hidden> wrote:
>
> New question #284388 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/284388
>
> Hi all,
>
> In https://answers.launchpad.net/mg5amcnlo/+faq/2014 the different options for the default dynamical scale are given.
> But I'm not sure I understand what happens when one runs a LO cross section calculation after a NLO initial production.
> Is the default scale in this case the NLO default?
>
> If yes, is there a way to select the LO default scale whilst running in the NLO production?
>
> Best,
>
> Josh.
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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