MadGraph5_aMC@NLO

Modify charm yukawa couplings in higgs to diphoton events

Asked by Brianna Stamas

Hi,

I'm looking for a model that will allow me to both generate p p > h, h > a a and also modify the charm yukawa coupling to see how this impacts the diphoton pT spectrum. I can't import both the heft and loop_sm models, so I'm hoping there's already a combination out there with ggF higgs production loops?

Thanks!
Brianna

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

In heft type of model, you will get the top-loop contracted, so in that type of model, you will not get any impact by changing the yukawa mass of the b or charm.
So you need to use the full one loop computation model with massive c quark so you need some sort of loop_sm model.
I believe that loop_sm-full might be a good fit for such computation.

Please look at arXiv:1507.00020 since this is exactly one of the example of that paper but where we study the impact of the b loop.
(and we also include and comment on the Higgs decay to photon in that paper)

Cheers,

Olivier

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