MadGraph5_aMC@NLO

matching schemes

Asked by IPSITA RAY

Hi,

I have a doubt ie. whether matching scheme is always necessary for signal vs background analysis.
Suppose I generate p p > t t~ or p p > z z or p p > z j j at LO and in signal I have 2 jets and missing energy in the final state.

Thanks.

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

This is something that I can not answer. Not doing matching/merging means that your production for
> p p > z z
 can not be trusted in presence of hard jets... It's then depend of your analysis to see if you are sensitve to that type of events from that background. From your description of the signal i would tend to say that this is the case.

In general you should go for the most precise generation mode available for the process but if you have good reason to do otherwise.

Cheers,

Olivier

> On 11 May 2019, at 18:52, IPSITA RAY <email address hidden> wrote:
>
> New question #680753 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/680753
>
> Hi,
>
> I have a doubt ie. whether matching scheme is always necessary for signal vs background analysis.
> Suppose I generate p p > t t~ or p p > z z or p p > z j j at LO and in signal I have 2 jets and missing energy in the final state.
>
> Thanks.
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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