MadGraph5_aMC@NLO

check gauge for running particle mass : not enough energy

Asked by Le Van Dung

I want to check gauge invariant of higgs decays for different higgs masses. I tried to change the energy with mass with:

check gauge h > t t~ --energy=500

But I then got the error:

"check h > t t~" with error:
RAMBOError : Not enough energy in this case

I know that there is a option to use a param_card but I don't know how to use it. Is there a way to check gauge without checking the mass ?

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

Here is the syntax:
MG5_aMC>help check
syntax: check [full|timing|stability|profile|permutation|gauge|lorentz|brs|cms] [param_card] process_definition [--energy=] [--split_orders=] [--reduction=]

so you can do something like:
check gauge ./param_card.dat h > t t~

> Is there a way to check gauge without checking the mass ?

Not without hacking the code.

Cheers,

Olivier

> On 5 Jul 2023, at 10:55, Le Van Dung <email address hidden> wrote:
>
> New question #707208 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/707208
>
> I want to check gauge invariant of higgs decays for different higgs masses. I tried to change the energy with mass with:
>
> check gauge h > t t~ --energy=500
>
> But I then got the error:
>
> "check h > t t~" with error:
> RAMBOError : Not enough energy in this case
>
> I know that there is a option to use a param_card but I don't know how to use it. Is there a way to check gauge without checking the mass ?
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Revision history for this message
Le Van Dung (dunglvht) said : 		#2

Thanks Olivier Mattelaer, that solved my question.