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

Asked by Patrick Zywicki on 2012-02-02

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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Last query:
2012-02-02
Last reply:
2012-02-02

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

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

Great :-)

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