MadGraph5_aMC@NLO

How to change the mass of a01 in NMSSM model?

Asked by Gurunadha Reddy

Hi,

I'm currently trying to generate the process "h01 > a01 a01, (a01 > g g, a01 > a a)" and I want to vary the mass of the pseudoscalar a01 from 10-70GeV. Its default mass in the model is 40GeV. Please help me.

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Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

1) the process definition does not seem to make sense to me. I would expect that you should get a warning about this.
I guess that the syntax definition that you are looking for is
h01 > a01 a01, a01 > g g, a01 > a a
(i.e. the same without paranthesis)

2) To vary a mass, you can use the following syntax: "scan:range(40,71,10) "

so assuming that the a01 has the id 36:
you will have to replace the line:
   36 4.039770e+01 # MxA01
by
 36 scan:range(40,71,10) # MxA01

more information here: https://answers.launchpad.net/mg5amcnlo/+faq/2735

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Gurunadha Reddy (ggreddy36) said : 		#2

Thanks Olivier Mattelaer, that solved my question.