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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 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. ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the HPS-SOFTWARE list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1