CalcHEP

Internal Higgs in a process e,E->W+,W-

Asked by Mauricio Oviedo

Good morning.

I need to produce two gauge bosons W+,- in the process electron+positron -> W+,W-. The results, in the unitary gauge (ON) to e,E -> W+,W- are three Feynman diagrams with internal particles nE, A and Z. My question is: I need analize the contribution of Higgs in this process, but it not appear. How can add the contribution of higgs boson in my process? I used the models SM and SM(+hgg) and continue with the same problem. Thnks!

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Alexander Pukhov (pukhov) said : 		#1

The simplest way is to assign to Ml - the mass of tau lepton - numerical
value of electron mass and to  test  the  process

l+,l- -> W+,W-

    Both  electron and muon are massless in CalcHEP realization of
SM.   Surely, you also can change the model as well.

Best

    Alexander Pukhov

On 12/10/20 6:25 PM, Mauricio Oviedo wrote:
> New question #694454 on CalcHEP:
> https://answers.launchpad.net/calchep/+question/694454
>
> Good morning.
>
> I need to produce two gauge bosons W+,- in the process electron+positron -> W+,W-. The results, in the unitary gauge (ON) to e,E -> W+,W- are three Feynman diagrams with internal particles nE, A and Z. My question is: I need analize the contribution of Higgs in this process, but it not appear. How can add the contribution of higgs boson in my process? I used the models SM and SM(+hgg) and continue with the same problem. Thnks!
>

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