MadGraph5_aMC@NLO

Error with process decay chain

Asked by Andrew Oana

Hi all,

I am trying to generate the following process:

e- n+ > e- n+ (x > (pv >f+ f-) ( pv > f+ f-))

(n+, x, pv, f+, f- are user defined particles)

This is the process used for generating events with MG4, but I am getting the following error when trying to generate it with MG5 (version 2.1.1):

Command "generate e- n+ > e- n+ (x > (pv >f+ f-) ( pv > f+ f-))" interrupted with error:
InvalidCmd : wrong format for "e- n+ > e- n+ x > pv >f+ f- pv > f+ f- " this part requires one or two symbols '>', 4 found

Is the syntax the problem? Any suggestions would be greatly appreciated.

Thanks,

Andrew

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

Hi Andrew,

Yes this syntax is not a valid MG5 syntax.

The correct syntax is

generate e- n+ > e- n+ x, ( x > pv pv , pv > f+ f-)

Cheers,

Olivier

n Jun 23, 2014, at 11:22 AM, Andrew Oana <email address hidden> wrote:

> New question #250626 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/250626
>
> Hi all,
>
> I am trying to generate the following process:
>
> e- n+ > e- n+ (x > (pv >f+ f-) ( pv > f+ f-))
>
> (n+, x, pv, f+, f- are user defined particles)
>
> This is the process used for generating events with MG4, but I am getting the following error when trying to generate it with MG5 (version 2.1.1):
>
> Command "generate e- n+ > e- n+ (x > (pv >f+ f-) ( pv > f+ f-))" interrupted with error:
> InvalidCmd : wrong format for "e- n+ > e- n+ x > pv >f+ f- pv > f+ f- " this part requires one or two symbols '>', 4 found
>
> Is the syntax the problem? Any suggestions would be greatly appreciated.
>
> Thanks,
>
> Andrew
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Andrew Oana (andrew-oana) said : 		#2

Thanks Olivier Mattelaer, that solved my question.