small cross section values, lhe problem

Just increase maximum luminosity
Write

Max lumi: 1e20

Statement before setting the number of events you would y to generate

Regards
Alexander

On Thu, 12 Dec 2019, 19:43 Nurhan Karahan, <
<email address hidden>> wrote:

> New question #686998 on CalcHEP:
> https://answers.launchpad.net/calchep/+question/686998
>
> Dear Calchep team,
>
> We are studying on a BSM model. In this model, for some processes (like
> pp->NP->ZZ-> llll where NP: new physics field, l: lepton), which have very
> small cross sections (< 10^(-11) pb) due to the unusual interaction
> between NP and SM particles, "lhe" files can not be created. Actually we
> obtain the numerical.txt, but the absent of lhe file will be a problem for
> our further analyses. How we can solve this problem?
>
>
>
> --
> You received this question notification because your team CalcHEP is an
> answer contact for CalcHEP.
>

If you use batch, then the problem can be caused by luminosity limit.
See bin/run_batch line  ~625

$max_lumi  = 1e+9;

Try to increase this number

Best

    Alexander Pukhov

On 12.12.2019 21:43, Nurhan Karahan wrote:
> New question #686998 on CalcHEP:
> https://answers.launchpad.net/calchep/+question/686998
>
> Dear Calchep team,
>
> We are studying on a BSM model. In this model, for some processes (like pp->NP->ZZ-> llll where NP: new physics field, l: lepton), which have very small cross sections (< 10^(-11) pb) due to the unusual interaction between NP and SM particles, "lhe" files can not be created. Actually we obtain the numerical.txt, but the absent of lhe file will be a problem for our further analyses. How we can solve this problem?
>
>
>

Dear Dr. Belyaev,

Sorry for my late reply. Yes, increasing the luminosity solved the problem.

Thank you for your help.