MadGraph5_aMC@NLO

Setting order=LO without interactive typing

Asked by Zachary Marshall

Hello,

Is there a nice way to set order=LO for an NLO run without typing something on the command line? Typing on the command line is rather not nice for things like running in a batch system. We can pipe something to STDIN, but in the past this caused some issues in the way MadGraph was passing things between the python and fortran layers.

Thanks,
Zach

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Zachary Marshall
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Olivier Mattelaer (olivier-mattelaer) said : 		#1

Olivier Mattelaer suggests this article as an answer to your question:
FAQ #2186: “How to script MG5 run?”.

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Olivier Mattelaer (olivier-mattelaer) said : 		#2

In short NEVER use
./bin/XXXX < CMD
but rather
./bin/XXXX CMD

Cheers,

Olivier

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Zachary Marshall (zach-marshall) said : 		#3

Thanks!

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Zachary Marshall (zach-marshall) said : 		#4

Thanks Olivier Mattelaer, that solved my question.

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Zachary Marshall (zach-marshall) said : 		#5

Hi Olivier,

One follow up: what if we're using ./bin/generate_events , which does not allow an input file with commands? Any solution for that case?

Cheers,
Zach

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Olivier Mattelaer (olivier-mattelaer) said : 		#6

You have either
./bin/madent
or
./bin/amcatnlo

where you can pass a file like
launch
order=LO
set mt 175

Cheers,

Olivier

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Zachary Marshall (zach-marshall) said : 		#7

Ok, so no, this is not possible with ./bin/generate_events . Thanks!