MadGraph5_aMC@NLO

change value of higgs self coupling

Asked by Alan Taylor

Hi all,

I'm looking to generate events with the higgs self coupling changed from the standard model value.. but I'm not sure how to change the value.

My thoughts are to do it in the param_card.dat but when I look in there I can't see the higgs self coupling.

How can I do it?

Cheers,

Alan

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

You need to create a new UFO model where this parameter is not internal (computed from the other SM value)
but external.
You can do that either by hand or by using FeynRules.

Cheers,

Olivier

PS: arXiv:1108.2040 will explain to you the UFO convention

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