MadGraph5_aMC@NLO

Convert StdHEP to HEPMC

Asked by SUBHASISH BEHERA

Hi Olivier,
I was looking into this : https://bugs.launchpad.net/pythia-pgs-for-mg/+bug/1334366
but the site is no longer available.
Can you provide an alternative way to either:
1. convert StdHEP files generated with Pythia-pgs of MG5 to convert to HEPMC ?
2. or can I directly get HEPMC after pythia-pgs run, after changing a few necessary files in pythia-pgs .

** I am aware that Pythia-pgs is not maintained any more, but still I have to work with the package in my project.
Thanks in advance.

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

 > 1. convert StdHEP files generated with Pythia-pgs of MG5 to convert to HEPMC ?

I do not know, I guess the "easiest" method would be to find a StdHEP converter to root and the apply a root the HEPMC converter.
But I have no experience on that.

> 2. or can I directly get HEPMC after pythia-pgs run, after changing a few necessary files in pythia-pgs .

You do not need PGS here, so this is a pure pythia6 run. As far as I know, pythia6 was never supporting HEPMC and since HepMC has only C++ interface, I doubt that it should be easy to modify, pythia6 to output such format. At least I would not be able to do it.

** I am aware that Pythia-pgs is not maintained any more, but still I have to work with the package in my project.

 It will make much more sense to move to pythia8 but in term of effort and in term of physics precision.

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SUBHASISH BEHERA (subhparasara) said : 		#2

Thanks Olivier.