MadGraph5_aMC@NLO

How to fix Luminosity ？

Asked by Zongyang LU

Dear expert,
If LHC has a limit on the cross-section of a certain process at 139fb-1. I also want to know how many scattering cross-sections my model can achieve in different parameter spaces at 139fb-1 during this process. How do I fix the Luminosity? If I obtain a scattering cross-section when the number of cases is 10000, can I calculate the current brightness using L=N/S? As a beginner, this is very frustrating for me.
Sincere Lu

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Olivier Mattelaer
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Best Olivier Mattelaer (olivier-mattelaer) said : 		#4

Hi,

We can not fix the effective luminosity (actually nothing really prevent us to allow it in the future --except that file size/running time can be so huge that it might be more relevant to split the computation anyway).

Now nothing prevent you to do a quick run with 10k events to get the cross-section and then knowing the luminosity that you want and the cross-section, you can compute the number of events that you expect to observe (and simulate that number)

Cheers,

Olivier

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Zongyang LU (zongyang) said : 		#5

Thanks Olivier Mattelaer, that solved my question.

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dfhd (rgdh6) said : 		#6

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