CalcHEP

Symbolic calculation taking too long time

Asked by Basabendu

Dear CalcHEP team,

I have implemented a BSM model in calcHEP which contains couple of BSM scalars (charged and uncharged). Now, while computing decays of SM or non-SM gauge bosons to these scalars (i.e, interactions involving derivative coupling), the symbolic calculation is taking a very long time and finally showing calcHEP has finished with error code 80. But the diagrams are coming out to be correct. I am unable to fix this issue. Kindly help me out.

Thank you.

Question information

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Solved by:
Alexander Pukhov
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Revision history for this message
Alexander Pukhov (pukhov) said : 		#1

Send me your model files

     <email address hidden>

Best
      Alexander Pukhov

On 10/16/2017 04:14 PM, Basabendu wrote:
> Question #659528 on CalcHEP changed:
> https://answers.launchpad.net/calchep/+question/659528
>
> Description changed to:
> Dear CalcHEP team,
>
> I have implemented a BSM model in calcHEP which contains couple of BSM
> scalars (charged and uncharged). Now, while computing decays of SM or
> non-SM gauge bosons to these scalars (i.e, interactions involving
> derivative coupling), the symbolic calculation is taking a very long
> time and finally showing calcHEP has finished with error code 80. But
> the diagrams are coming out to be correct. I am unable to fix this
> issue. Kindly help me out.
>
> Thank you.
>

Revision history for this message
Best Alexander Pukhov (pukhov) said : 		#2

Just replace
     (p1-p2)*m3
on
     (p1-p2).m3
First one definitely is wrong.
I'll improve CalcHEP to detect such bugs in "CHECK MODEL"

Thanks you for your message
    Alexander Pukhov

On 10/16/2017 04:14 PM, Basabendu wrote:
> Question #659528 on CalcHEP changed:
> https://answers.launchpad.net/calchep/+question/659528
>
> Description changed to:
> Dear CalcHEP team,
>
> I have implemented a BSM model in calcHEP which contains couple of BSM
> scalars (charged and uncharged). Now, while computing decays of SM or
> non-SM gauge bosons to these scalars (i.e, interactions involving
> derivative coupling), the symbolic calculation is taking a very long
> time and finally showing calcHEP has finished with error code 80. But
> the diagrams are coming out to be correct. I am unable to fix this
> issue. Kindly help me out.
>
> Thank you.
>

Revision history for this message
Basabendu (bb1988-1) said : 		#3

Thanks Alexander Pukhov, that solved my question.