MadAnalysis 5

In which reference frame are differential distributions plotted?

Asked by Steven Jeremies

Dear MadAnalysis5 Team,

I read that in madgraph5 the data from the unweighted_events.lhe.gz files are generated in the CM-system.
If I use those files as the database to plot differential distributions in MadAnalysis5, are those in the CM-system as well?

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Jack Y. Araz
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Best Jack Y. Araz (jackaraz) said : 		#1

Hi

If im not mistaken LHE file, given that its generated for a collision system e.g. proton-proton, should be in lab frame. BUT if you are writing LHE file for a decay, say h > l+ l-, that should result in CoM-frame LHE file.

Cheers

—
Jack Y. Araz

> On Sep 3, 2021, at 9:00 PM, Steven Jeremies <email address hidden> wrote:
>
> [EXTERNAL EMAIL]
>
> New question #698629 on MadAnalysis 5:
> https://answers.launchpad.net/madanalysis5/+question/698629
>
> Dear MadAnalysis5 Team,
>
> I read that in madgraph5 the data from the unweighted_events.lhe.gz files are generated in the CM-system.
> If I use those files as the database to plot differential distributions in MadAnalysis5, are those in the CM-system as well?
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

Revision history for this message
Steven Jeremies (minits) said : 		#2

Thanks Jack Y. Araz, that solved my question.