Pythia-PGS routine for MG5

Asked by Doyoun Kim

Hello, it's so great to see version 1.0.0 MG5.
I have used MG5 from its beta service, and I have a question on how to use pythia-pgs package in new MG5.

In MG4, I could just extract the package in the MG4 directory and compile it. Then it worked. But pythia-pgs package does not seem to be available for MG5 because there is no MadEvent directory in the full MG5 directory. I am not well understanding the structure of MG5, but it looks like (for me) that MadEvent package is already included in the MG because I can calculate the cross section with "./bin/calculate_crossx" command in the "Templete" directory.

So my question is, how can I use pythia-pgs package in MG5 even if MadEvent structure has changed? I know we can do it anyway because we can do PGS simulation with MG5 in the madgraph web page.

Thank you.

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Solved by:
Johan Alwall
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Best Johan Alwall (johan-alwall) said :

Dear Doyoun,

Thanks for your question! In fact, running Pythia and PGS (as well as MadAnalysis, topdrawer, ExRootAnalysis and Delphes) works exactly the same way for MG5 as it does for MG4. Just place the pythia-pgs directory at the same level as your process directory (typically, in the MadGraph5_v1_x_x directory). Then Pythia and PGS will be run automatically if you have a pythia_card.dat and pgs_card.dat in your Cards directory.

Very best regards,

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Doyoun Kim (abistp00) said :

Thanks Johan Alwall, that solved my question.