Distinguish leptonic jets from hadronic jets

Asked by JamesB on 2018-01-31

Hello,

I have created parton level events with Madgraph and showered them with Pythia8. Next I have performed jet clustering and detector effects using Delphes through Madanalysis.

My question is based on the output after Delphes:
How can I distinguish leptonic jets from hadronic jets (my events have both)? In the ROOT file I am using I can't see any way to distinguish them. Perhaps some condition on delta(R) between lepton and jet, but I have no idea how to set this condition (either through Delphes, Madanalysis or altering the card I am using (delphes_ATLAS).

Thank you for your help,
James

Question information

Language:
English Edit question
Status:
Solved
For:
MadAnalysis 5 Edit question
Assignee:
No assignee Edit question
Solved by:
Benjamin Fuks
Solved:
2018-01-31
Last query:
2018-01-31
Last reply:
2018-01-31
Benjamin Fuks (fuks) said : #1

Hi James,

You can indeed select/reject electrons that are well separated from a jet. This is the way to go. But this has to be done offline, at the level of the analysis.

Cheers,

Benjamin

> On 31 Jan 2018, at 18:52 , JamesB <email address hidden> wrote:
>
> New question #663919 on MadAnalysis 5:
> https://answers.launchpad.net/madanalysis5/+question/663919
>
> Hello,
>
> I have created parton level events with Madgraph and showered them with Pythia8. Next I have performed jet clustering and detector effects using Delphes through Madanalysis.
>
> My question is based on the output after Delphes:
> How can I distinguish leptonic jets from hadronic jets (my events have both)? In the ROOT file I am using I can't see any way to distinguish them. Perhaps some condition on delta(R) between lepton and jet, but I have no idea how to set this condition (either through Delphes, Madanalysis or altering the card I am using (delphes_ATLAS).
>
> Thank you for your help,
> James
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

JamesB (jamesb8) said : #2

Hello Benjamin,

>> But this has to be done offline, at the level of the analysis.

Does this mean this should be set in the Delphes card that I use?

Best Benjamin Fuks (fuks) said : #3

Hi James,

No. This has to be implemented at the level of your analysis. Not at the level of the reconstruction.

Regards,

Benjamin

> On 31 Jan 2018, at 21:22 , JamesB <email address hidden> wrote:
>
> Question #663919 on MadAnalysis 5 changed:
> https://answers.launchpad.net/madanalysis5/+question/663919
>
> Status: Answered => Open
>
> JamesB is still having a problem:
> Hello Benjamin,
>
>>> But this has to be done offline, at the level of the analysis.
>
> Does this mean this should be set in the Delphes card that I use?
>
> --
> You received this question notification because you are an answer
> contact for MadAnalysis 5.

JamesB (jamesb8) said : #4

Thanks Benjamin Fuks, that solved my question.