MadGraph5_aMC@NLO

VBF production of Higgs with Higgs to diphoton

Asked by Youying

Hi,

I want to generate Higgs production via Vector Boson fusion corresponding to the t-channel and also want to let higgs decay to diphoton. I use heft(higgs effective theory) model and write

generate p p > h j j , h > a a

But this will generate some process with gluons contribution. Therefore, these generated processes will not be "pure" VBF(H->diphoton) but some other processes I don't want. So I don't know how to generate pure VBF with H->diphoton. Any method can generate this?

Thanks
Youying

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MadGraph5_aMC@NLO Edit question
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Valentin Hirschi
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Best Valentin Hirschi (valentin-hirschi) said : 		#1

You can specify coupling order constraints to make sure the 'h g g' effective interaction is turned off.

generate g g > h g g HIG=0, h > a a

In general, when a solution like the above is not available you can modify the UFO to add special coupling orders to particular interactions you want to have an individual handle on, or you can use directly diagram filtering with a plugin (https://cp3.irmp.ucl.ac.be/projects/madgraph/wiki/FAQ-General-15)

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Youying (youying) said : 		#2

Thanks Valentin Hirschi, that solved my question.