total width

Asked by said ghourmin

Hi,
i have calculated the double charged higgs total width using FeynRules i get 661Gev but when i use Madgraph i get 4122Gev. do you have any comment why didn't agree?

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Olivier Mattelaer (olivier-mattelaer) said :
#1

Hi,

Fr is only able to compute two body width (as far as I know) while madgraph can include three body decay.
This is likely the difference since for two body decay madgraph is using FeynRules for the computation.

Cheers,

Olivier

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said ghourmin (saidghourmin) said :
#2

thank you

another problem is when generate my UFO model always i get total width of none SM particle are set to 1 didn't take its correct value

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Olivier Mattelaer (olivier-mattelaer) said :
#3

For this you need to change your .fr file and set inside the default value that you want for those parameter.

Cheers,

Olivier

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said ghourmin (saidghourmin) said :
#4

Always i have to set this paramater by value that i want, there is no way
this parameter take value calculated by feynrules without my set ?

Le mer. 10 nov. 2021 à 19:20, Olivier Mattelaer <
<email address hidden>> a écrit :

> Your question #699426 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/699426
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> For this you need to change your .fr file and set inside the default
> value that you want for those parameter.
>
> Cheers,
>
> Olivier
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
>
> https://answers.launchpad.net/mg5amcnlo/+question/699426/+confirm?answer_id=2
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/mg5amcnlo/+question/699426
>
> You received this question notification because you asked the question.
>

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Olivier Mattelaer (olivier-mattelaer) said :
#5

fr is net my expertise. so. mabe it is possible but I do not know

> On 10 Nov 2021, at 20:41, said ghourmin <email address hidden> wrote:
>
> Question #699426 on MadGraph5_aMC@NLO changed:
> https://answers.launchpad.net/mg5amcnlo/+question/699426
>
> Status: Answered => Open
>
> said ghourmin is still having a problem:
> Always i have to set this paramater by value that i want, there is no way
> this parameter take value calculated by feynrules without my set ?
>
> Le mer. 10 nov. 2021 à 19:20, Olivier Mattelaer <
> <email address hidden>> a écrit :
>
>> Your question #699426 on MadGraph5_aMC@NLO changed:
>> https://answers.launchpad.net/mg5amcnlo/+question/699426
>>
>> Status: Open => Answered
>>
>> Olivier Mattelaer proposed the following answer:
>> For this you need to change your .fr file and set inside the default
>> value that you want for those parameter.
>>
>> Cheers,
>>
>> Olivier
>>
>> --
>> If this answers your question, please go to the following page to let us
>> know that it is solved:
>>
>> https://answers.launchpad.net/mg5amcnlo/+question/699426/+confirm?answer_id=2
>>
>> If you still need help, you can reply to this email or go to the
>> following page to enter your feedback:
>> https://answers.launchpad.net/mg5amcnlo/+question/699426
>>
>> You received this question notification because you asked the question.
>>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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