Hi Radek, The events with richRadius corresponds to events without RichRdo data. This can happen when all the adc values are below te thresholds. This do happen in simulations too, and is probably cause by interactions between T5 and going into the rich. So this do infact corresponds to NoHits and an effeciency. in order .4% for pions. There is in fact no way in the data to distinguish between a pion interaction say after H2 or a proton. SO I would say the proper treatment is to include them as having radius 0, since they are good tracks up to and including T5, and losses and contamination has to be dealt with offline. I added a diagnostic histogram in the RichPid to diagnose this Probably we should change the dstcode to set FS.fRich.fRadius to 0 when there is no pid object, or make an empty pid object in this case. Flemming -------------------------------------------- Flemming Videbaek Physics Department Bldg 510-D Brookhaven National Laboratory Upton, NY11973 phone: 631-344-4106 fax: 631-344-1334 e-mail: videbaek @ bnl.gov _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-dev-lReceived on Fri Jan 6 12:01:49 2006
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