Opened 9 years ago
Last modified 9 years ago
#903 new How to
Particle Flow for ATLAS detector?
| Reported by: | Bryan | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | Delphes code | Version: | Delphes 3 |
| Keywords: | Cc: |
Description
We are trying to reproduce the results of an ATLAS search for dark photons which decay to electrons. They reconstruct the "lepton-jet" using tracks, and then later make cuts based on the ratio of energies in the Ecal and Hcal. This seems to work for some of the events that we have examined (using the default ATLAS card), but about half of our events end up having a lepton jet that has 0 energy deposited in the Ecal (according to the Tower. Eem). I assume that this comes from the merger between the track vs tower step. If I want to always have access to both the tracks and the towers (specifically looking for overlap between these), how should I do this?
Thank you very much for your help.
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Hi,
apologies for the late reply.
I am not sure sure I understand the procedure exactly. Are these lepton-jets reconstructed using only tracks?
In the default ATLAS card there is no merging between tracks and towers, only towers are used for jet clustering. In principle the particle flow collection (which is not used by default in the ATLAS card) takes care of merging without overlap tracks and towers deposits. In order to use them you should replace the input of FastJetFinder by
I am not sure if this answers your question.
Michele