MadGraph5_aMC@NLO

how to set invariant mass of pair of e- e+

Asked by Riju

i want to set the minimum invariant mass of ve ve~ pair 375 GeV for e- e+ > ve ve~ h process.I tried writing {{12,-12}:375} in minimum invariant mass section in run card.But it is not working.

the following error is showing:
ValueError : not enough values to unpack (expected 2, got 1)

what i should do?

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

You can use the following:

{12:375} = mxx_min_pdg ! min invariant mass of a pair of particles X/X~ (e.g. {6:250})
{'default': True} = mxx_only_part_antipart ! if True the invariant mass is applied only
                               ! to pairs of particle/antiparticle and not to pairs of the same pdg codes.

The second "mxx_only_part_antipart " is not really needed here.

Cheers,

Olivier

> On 12 Mar 2024, at 05:10, Riju <email address hidden> wrote:
>
> New question #709535 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/709535
>
> i want to set the minimum invariant mass of ve ve~ pair 375 GeV for e- e+ > ve ve~ h process.I tried writing {{12,-12}:375} in minimum invariant mass section in run card.But it is not working.
>
> the following error is showing:
> ValueError : not enough values to unpack (expected 2, got 1)
>
> what i should do?
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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