CalcHEP

Distributions in CalcHEP

Asked by Ekaterina

Hello, dear CalcHEP experts!

In our work it became necessary to obtain a certain kind of FSR spectrum distribution.
We would like to obtain a differential distribution of photons in the final state {d \ sigma \ over dE (A)} multiplied by E (A) ^ 2, that is, {d \ sigma \ over dE (A)} * E (A) ^ 2.
Could you tell us if we can get such a distribution in CalcHEP?

Thank you!

Question information

Language:
English Edit question
Status:
Answered
For:
CalcHEP Edit question
Assignee:
No assignee Edit question
Last query:
Last reply:
Revision history for this message
Alexander Pukhov (pukhov) said : 		#1

You can get dN/dE distribution

For instance, you can  compile   h->l,L,A processes and

set cut for E(A) - energy of photon

get distribution over E(A).

By this way you'll  d\omega/dE.

In order to get dN/dE for single lepton you have to delete obtained
distribution on 2*width(h->l,L)

But there is a formula for such distribution which depends on particle spin.

Best

     Alexander Pukhov

On 17.05.2019 12:42, Ekaterina wrote:
> New question #680896 on CalcHEP:
> https://answers.launchpad.net/calchep/+question/680896
>
> Hello, dear CalcHEP experts!
>
> In our work it became necessary to obtain a certain kind of FSR spectrum distribution.
> We would like to obtain a differential distribution of photons in the final state {d \ sigma \ over dE (A)} multiplied by E (A) ^ 2, that is, {d \ sigma \ over dE (A)} * E (A) ^ 2.
> Could you tell us if we can get such a distribution in CalcHEP?
>
> Thank you!
>
>

Can you help with this problem?

Provide an answer of your own, or ask Ekaterina for more information if necessary.

To post a message you must log in.