Invariant Mass for 3 particles

Asked by Ribella on 2021-05-22

Hi,

We want to calculate the process e-e+->Z W+ W- . We want to put the triple invariant mass cut (M_(WWZ)) of the final state particles into the runcard. What do we need to do?

Best Regards,

Murat

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Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said :
#1

Hi,

If you set lpp1=lpp2=0 then M(ZWW) is fixed and your question does not make sense.
If you are using ISR mode (from a plugin) then this is a very dangerous cut to put.
We do not have any option to include such cut in the run_card.
So the only solution would be to hardcode it in dummy_functions.f
However your cut is likely required to modify the phase-space integrator.
This should be done in setcuts.f (in the best case scenario, which is the one where the phase-space integration should not be modifed to handle the cut).

Cheers,

Olivier

> On 22 May 2021, at 21:30, Murat <email address hidden> wrote:
>
> New question #697199 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/697199
>
>
> Hi,
>
>
> We want to calculate the process e-e+->Z W+ W- . We want to put the triple invariant mass cut (M_(WWZ)) of the final state particles into the runcard. What do we need to do?
>
>
> Best Regards,
>
> Murat
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Ribella (ribella) said :
#2

Thanks Olivier Mattelaer, that solved my question.

Revision history for this message
Ribella (ribella) said :
#3

Thanks Olivier Mattelaer, that solved my question.