changing model parameters
Hi,
I was trying to change the triple Higgs self-coupling value in SM. I know that there are .mdl files in the share/models folder. In that the SM.mdl file seems to have some variables that would be used to calculate the triple higgs coupling. Also there is a F90 file with the gh3 variable in it in the src/models folder.
I wanted to know if changing variable values in these files is the way to change the coupling or is there a better way? I do not want to affect any other properties of the SM model and so directly changing gh3 would be ideal I think. But whizard does not allow access to that variable from the interactive session.
Thanks,
Nikhil
Question information
- Language:
- English Edit question
- Status:
- Solved
- For:
- WHIZARD Edit question
- Assignee:
- Juergen Reuter Edit question
- Solved by:
- Juergen Reuter
- Solved:
- 2020-05-12
- Last query:
- 2020-05-12
- Last reply:
- 2020-05-12
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#1 |
Hi Nikhil,
of course you can edit the file src/models/
really the intended way. The intended way is that you use the model SM_ac instead of SM and then you
can directly set the parameter fac_gh3 which serves as a kappa parameter for the triple Higgs coupling.
You also have to set ka = 0 and kz = 0 I think. Otherwise there are anomalous triple gauge couplings, please
check. The third possibility is that you take a UFO model with a modified triple Higgs coupling.
Cheers,
JRR
Nikhil Bachhawat (nikhilb1997) said : | #2 |
Thanks Juergen Reuter, that solved my question.