LISTSERV 16.5 - HPS-SOFTWARE Archives

On Jul 28, 2015, at 10:47 AM, Sebouh Paul <[log in to unmask]> wrote:

Which collections in the recon pass1 contain the following information?
1) ECal clusters that may or may not be matched to a track (i assume this is "EcalClusters")

2) Tracks in the SVT that may or may not be matched to a cluster

1) yes

2) MatchedTracks

You can get both of these from FinalStateParticles. If a cluster isn’t matched it has PID of a photon; if a track isn’t matched it will have energy = momentum (I tried to have energy = 0 but people yelled at me). Also, you can look at the track or cluster associated to the ReconstructedParticle.

The reason why I am interested in this is because for one project (the muon/pion detection) I am interested in looking for events with 3 tracks in the SVT and 1 cluster in the Ecal, and filtering out other types of events. For the other project (proton radius) I am interested in looking for events with exactly one track and exactly one cluster, so that i can look at just the elastic scattering with everything else filtered out. (if there are 2 tracks and one cluster, it might be moeller scattering where one cluster is just missing, for instance if the particle just missed the ECal. Or if there are 3 tracks and one cluster, it might be a muon or pion event).

thanks.

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