Generating events at NLO

Asked by Nivedita Ghosh

I want to generate events at NLO for b quark production at parton level. Is there any upper limit on the maximum number of events that can be generated at a single run.? I am trying to generate 20Lakh at one go. Is this possible to generate? Thank you.

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Olivier Mattelaer (olivier-mattelaer) said :

What is a Lakh?

I do not know the exact limit of the number of events.
You certainly have a limit due to
1) the size of the output file
2) the scaling of the code (if it is not perfectly linear, you will gain by splitting it into smaller generation)
3) the periodicity of the random number generator

But I do not think that we have implemented a maximum value for that number of events at NLO (while we do have a limit to 500k at LO due to a limit to 2G of some old format, that format is not used anymore but we never remove the limitation.)



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