Regarding Missing ET definion in the run_card.dat

Hi,

The cut in the run_card are at parton level.
At this level, the sum of the neutrino momenta and the sum of all the others final state particle is equal (up to the sign)
So using one or the other is equivalent.

Of course remember that you should put very loose cut at parton level (especially for missing ET) since the shower and hadronisation
will modify your observables (especially for missing ET)

Cheers,

Olivier

> On Jan 30, 2016, at 06:21, shibasipu <email address hidden> wrote:
>
> New question #284136 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/284136
>
> Dear Olivier,
> In the run_card.dat, missing ET is given in terms of sum of neutrino's momenta. But it is hard to detect neutrinos. That's why in the literature, missing ET is defined in terms of sum of visible particle's momenta (of course with a negative sign in the front). Suppose , my final states contains neutrinos. I want to apply an acceptance cut on missing ET. Will your definition of missing ET work for this purpose ?
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> Regards,
> Shiba
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