Double higgs production via longitudinally polarized ww initial states

Asked by Ramkrishna on 2017-07-31

Hello,

I am trying to study the cross section for WW > HH process, where initial state WW are longitudinally polarized (i.e. from ww collider).

I saw the link https://answers.launchpad.net/mg5amcnlo/+faq/2243 where it is described to modify the polarization of final state particles. Can we do the same for initial state particles. We were trying but unable to understand the value of IDEN for our case.

Any help is appreciated.

with regards,
Ram

Question information

Language:
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Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
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Solved by:
Olivier Mattelaer
Solved:
2017-08-05
Last query:
2017-08-05
Last reply:
2017-07-31

Hi,

In this case, your iden parameter is 18 because it is
3*3*2
3: helicity for the w+
3: helicity for the w-
2: symmetry factor because you have two identical particle in the final state

Cheers,

Olivier

> On 31 Jul 2017, at 11:19, Ramkrishna <email address hidden> wrote:
>
> New question #654258 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/654258
>
> Hello,
>
> I am trying to study the cross section for WW > HH process, where initial state WW are longitudinally polarized (i.e. from ww collider).
>
> I saw the link https://answers.launchpad.net/mg5amcnlo/+faq/2243 where it is described to modify the polarization of final state particles. Can we do the same for initial state particles. We were trying but unable to understand the value of IDEN for our case.
>
> Any help is appreciated.
>
> with regards,
> Ram
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Thanks Olivier Mattelaer, that solved my question.