MadGraph5_aMC@NLO

QCD scale for monojet signature without jet matching?

Asked by Alexander Belyaev

Hello,
is there a simple answe on the following question:
what is the default MG QCD scale for monojet signature (DM pair plus quark or gluon) without jet matching?
Thank you,
Sasha

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

> is there a simple answer on the following question:

Not really,
In short, this is the transverse mass of the 2>2 system obtained by a kt-clustering of the events following the CKKW approach.
This scale choice is particularly sensitive for MLM/CKKW matching/merging and i would advise to use it in presence of matching/merging.

If you do not perform matching/merging, then it might be easier (for your understanding) to switch the dynamical_scale_choice
to a positive number where the dynamical scale choice is then associate to a simple analytical function.

Cheers,

Olivier

> On Aug 31, 2016, at 14:52, Alexander Belyaev <email address hidden> wrote:
>
> New question #375110 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/375110
>
> Hello,
> is there a simple answe on the following question:
> what is the default MG QCD scale for monojet signature (DM pair plus quark or gluon) without jet matching?
> Thank you,
> Sasha
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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