h -> W-, 2*x

You are the best. Thanks Alexander Pukhov, that solved my question.

Hi,

I am following your discussion.
I wonder how could one do a scan over any model parameter in this case? Like the Higgs mass, for instance.
I mean, when one proceeds as you told, it gives a table in /.../results/prt_N but for fixed parameters.
I tried to use the batch file using "Decay" and "Process", but it is like Lucia told.
Thank you!

Best,
Jacinto

Please, try*par_scan *

You prepare n_calchep,   create /data_file/ with parameters  and call

../../bin/par_scan < data_file

See short description in bin/README

Best

     Alexander Pukhov

PS. In principle h-> W+,W- with virtual W is  realized in CalCHEP
automatically.

See F5 (Option)

           Virtual W/Z  decay      ON

For precise calculation of  h(120) width we have to take into account
virtualities  of  both W   simultaneously.

On 5/1/23 20:45, Jacinto Paulo Neto wrote:
> Question #706456 on CalcHEP changed:
> https://answers.launchpad.net/calchep/+question/706456
>
> Jacinto Paulo Neto posted a new comment:
> Hi,
>
> I am following your discussion.
> I wonder how could one do a scan over any model parameter in this case? Like the Higgs mass, for instance.
> I mean, when one proceeds as you told, it gives a table in /.../results/prt_N but for fixed parameters.
> I tried to use the batch file using "Decay" and "Process", but it is like Lucia told.
> Thank you!
>
> Best,
> Jacinto
>

Dear Lucia and Jacinto,

the best way to evaluate  h -> W-, 2*x
is to use par_scan script as Alexander Pukhov has written.

You can do this however using batch to0.

For example id you use this batch file

=============
Model: SM(CKM=1 with hGG/AA)
Decay: h->W-,2*x
Run parameter: Mh
Run begin: 100
Run step size: 50
Run n steps: 3

Filename: batch_#706456
Max number of cpus: 8
Max number of nodes: 8
nSess_1: 5
nCalls_1: 10000
nSess_2: 5
===============

then you will evaluate the h->W-,2*x decay width as a function of the Higss mass.
If you have the problem with your batch file, please send it to us directly
(<email address hidden> and <email address hidden>)

My main question to you is actually why are trying to evaluate this process?
The point is that the particle widths are evaluated automatically in the model.

So, when you run the parameter scan in your batch for a certain production process the Higgs as well as all particle widths
are evaluated automatically in CalcHEP for any given model as soon as you have "!" mark for width parameter in the particle table.

Please clarify this and send your batch file, so we could help and clarify things.
The batch file examples you have been following are examples to evaluate the cross sections.
Therefore I guess that, the batch file was trying to do exactly what you have requested.

Best regards
Alexander Belyaev

On 30/04/2023 02:15, SILVIA LUCIA CORREA ANGEL wrote:
> Question #706456 on CalcHEP changed:
> https://answers.launchpad.net/calchep/+question/706456
>
> Description changed to:
> Hi! I hope you are okay! I'm trying to do a decay process h -> W-, 2*x
> and I followed your instructions in another similar answer using
> batchfile but I don't why it is trying to calculate cross section ( it
> does not make sense) and all the results are 0. I asked to my colleagues
> because I thought I was doing something wrong but they also don't know
> what is happening. Thank you for your patience.
>
> --
> You received this question notification because your team CalcHEP is an
> answer contact for CalcHEP.

--
................................
Professor Alexander S Belyaev
https://www.soton.ac.uk/~ab1u06
.......
Physics & Astronomy 46/5047
University of Southampton
Southampton SO171BJ
................................

Dear Alexander Belyaev,

I thank you and Alexander Pukhov. Your amazing.
Thank you for helping us.

By the way, I could avaluate the problem as Pukhov said.
And also, I will try this another way.

I am really glad!

We are trying it just to study CalcHEP, the batch mode, specifically.
It is related to particle physics' lectures from Professor Farinaldo Queiroz course.

Best regards,
Jacinto Paulo Neto

Thanks Jacinto.
Regards to Farinaldo!
Next time, please send us your  batch file, so we would know what exact
problem do you have,
so we could help you promptly.
Best
Alexander

On 02/05/2023 01:40, Jacinto Paulo Neto wrote:
> CAUTION: This e-mail originated outside the University of Southampton.
>
> Question #706456 on CalcHEP changed:
> https://answers.launchpad.net/calchep/+question/706456
>
> Jacinto Paulo Neto posted a new comment:
> Dear Alexander Belyaev,
>
> I thank you and Alexander Pukhov. Your amazing.
> Thank you for helping us.
>
> By the way, I could avaluate the problem as Pukhov said.
> And also, I will try this another way.
>
> I am really glad!
>
> We are trying it just to study CalcHEP, the batch mode, specifically.
> It is related to particle physics' lectures from Professor Farinaldo Queiroz course.
>
>
> Best regards,
> Jacinto Paulo Neto
>
> --
> You received this question notification because your team CalcHEP is an
> answer contact for CalcHEP.

--
................................
Professor Alexander S Belyaev
https://www.soton.ac.uk/~ab1u06
.......
Physics & Astronomy 46/5047
University of Southampton
Southampton SO171BJ
................................