Creating a collection of reco::Muons from the muon PFCandidates

Overview

The PFCandidates of type muon are a subset of the official reco::Muon collection provided by the muon PAG. The particle flow algorithm can thus be considered as a muon selection, and it is possible to commission this kind of selection in the same way as the other standard muon selections in CMS.

This page provides a recipe to run an EDProducer:

• reading the standard collection of PFCandidates from the particle flow
• creating a new collection of reco::Muons, from which the muon PFCandidates have been built.

Getting the code and running

scram project CMSSW CMSSW_3_6_1_patch2
cd CMSSW_3_6_1_patch2/src
cmsenv
cvs co -r Colin_RecoMuFromPF_Working RecoParticleFlow/PFProducer
scram b -j 4
cd RecoParticleFlow/PFProducer/test
cmsRun  cmsRun createRecoMuonsFromPFCandidates_cfg.py 

You get a new collection of muons in the event:

recoMuons_recoMuonFromPFProducer__ANALYSIS

Run the following macro:

root plotRecoMuons.C

It plots the charge of the PFCandidates of type muons, and the charge of the muons in recoMuons_recoMuonFromPFProducer__ANALYSIS. It is just a check that all PFCandidates of type muons give rise to a reco::Muon candidate in this collection.

Using this code in your analysis.

Just check RecoParticleFlow/PFProducer/test/createRecoMuonsFromPFCandidates_cfg.py, which is self-documented.

-- ColinBernet - 26-May-2010