SM is diverging (especilay b and B quarks) at if sqrt{s} is very high

This question was expired because it remained in the 'Open' state without activity for the last 15 days.

Yes, I still have this problem.
Dr.Yusuf Oğuzhan Günaydın
Kahramanmaras Sutcu Imam University
Faculty of Science and Letters
Department of Physics

> On Aug 19, 2020, at 4:20 PM, Launchpad Janitor <email address hidden> wrote:
>
> Your question #692193 on CalcHEP changed:
> https://answers.launchpad.net/calchep/+question/692193
>
> Status: Open => Expired
>
> Launchpad Janitor expired the question:
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This question was expired because it remained in the 'Open' state without activity for the last 15 days.

I guess that you cannot solve this problem. I think I need to migrate to
other HEP phenomenology simulation softwares. Thank you for your interest!

4 Eyl 2020 Cum 16:05 tarihinde Launchpad Janitor <
<email address hidden>> şunu yazdı:

> Your question #692193 on CalcHEP changed:
> https://answers.launchpad.net/calchep/+question/692193
>
> Status: Open => Expired
>
> Launchpad Janitor expired the question:
> This question was expired because it remained in the 'Open' state
> without activity for the last 15 days.
>
> --
> If you're still having this problem, you can reopen your question either
> by replying to this email or by going to the following page and
> entering more information about your problem:
> https://answers.launchpad.net/calchep/+question/692193
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Finally, we find out the solution that is PDF we changed cteq6l1 to CT10. Then, diverging in the distribution plot has gone by this choose of PDf.

Thank you for your mail and  sorry for delayed response.

I tested your point and at  first run indeed have got divergent cross
section.  The only that I  have  managed to understand  is sqrt(s)
distribution was concentrated at M=5170. But after some changes  the
problem disappears and now I can not  see it again in spite of all my
efforts.

I use GUY interface with Pt cut 10GeV.  My answers for steq6l1 and CT10
are    2.44E4 pb  and    2.01E4 pb. The difference looks reasonable.

I'll  make a new attempt  to catch the bug later on.

Best

     Alexander Pukhov

On 03.08.2020 18:45, Yusuf Oğuzhan Günaydın wrote:
> New question #692193 on CalcHEP:
> https://answers.launchpad.net/calchep/+question/692193
>
> Hi,
> in calchep version 3.8.5, my setting is;
> SM Model
> Process m,p->m,j
> j: G,d,D,u,U,c,C,s,S,b,B
> In State
> S.F: Off
> S.F.:cteq6l1(proton)
> First Particle Momentum (GeV): 20000
> Second Particle Momentum (GeV): 50000
> on subprocesses;
> m,b->m,b
> m,B->m,B
> although I applied cuts final state particles, cross-section values are diverging. This problem does not appear if I deal with lower center of mass energies.
>
> Also, when I try to obtain N(m) and N(j) distribution plots with a different version of calchep e.i calchep3.6.25 vs calchep3.8.5, both distributions are inconsistent. That is, distributions are switching each other, which version is giving correct distribution?
> Thanks.
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