MadGraph5_aMC@NLO

I don't know how to change the higgs mass in Madgraph5.

Asked by Patrick Zywicki

I'm not sure how to change higgs mass in the sm model in MadGraph5_v1_3_27. I used to just change the param_card.dat in version 4, but I tried to do that in version 5 and it doesn't work. I tried to do python write_param_card.py but don't know what python script to change to let me do this. Can you help me?

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

In principle, you can change the Higgs mass in the param-card after have made an output.
so if you do
generate p p > z h
output my_dir

you can edit the param_card.dat which is in my_dir/Cards/param_card.dat

If you want to modify the default value (such that you don't have to edit it each times), you need to modify this files:
for model sm: edit models/sm/restrict_default.dat
for model sm-full edit models/sm/parameters.py (and search for MH)
for model sm-ckm edit models/sm/restrict_ckm.dat
for model sm-no_b_mass edit models/sm/restrict_no_b_mass.dat
...
for model sm-XXXXXX edit models/sm/restrict_XXXXXX.dat (but if XXXXXX is full)

Those restriction files, simplifies the model (remove some parameters those to zero, one, ...) and defines the default value.

Cheers,

Olivier

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Patrick Zywicki (zywicki) said : 		#2

On 02/02/2012 05:30 PM, Olivier Mattelaer wrote:
> Your question #186652 on MadGraph5 changed:
> https://answers.launchpad.net/madgraph5/+question/186652
>
> Status: Open => Answered
>
> Olivier Mattelaer proposed the following answer:
> In principle, you can change the Higgs mass in the param-card after have made an output.
> so if you do
> generate p p> z h
> output my_dir
>
> you can edit the param_card.dat which is in my_dir/Cards/param_card.dat
>
> If you want to modify the default value (such that you don't have to edit it each times), you need to modify this files:
> for model sm: edit models/sm/restrict_default.dat
> for model sm-full edit models/sm/parameters.py (and search for MH)
> for model sm-ckm edit models/sm/restrict_ckm.dat
> for model sm-no_b_mass edit models/sm/restrict_no_b_mass.dat
> ...
> for model sm-XXXXXX edit models/sm/restrict_XXXXXX.dat (but if XXXXXX is full)
>
> Those restriction files, simplifies the model (remove some parameters
> those to zero, one, ...) and defines the default value.
>
> Cheers,
>
> Olivier
>
 Thanks Olivier, it worked!

Patrick

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Olivier Mattelaer (olivier-mattelaer) said : 		#3

Great :-)

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