ciao Alberto, per questioni tecniche di ROOT riguardanti pero' ALICE e' meglio mandare il mail alla lista alice-off@cern.ch di cui ance tu fai parte. ciao Roberto On Tue, 5 Feb 2002, Alberto Pulvirenti wrote: > Date: Tue, 05 Feb 2002 10:28:18 +0100 > From: Alberto Pulvirenti <alberto.pulvirenti@CT.INFN.IT> > To: ROOT mailing list <roottalk@pcroot.cern.ch> > Subject: [ROOT] Info about TParticle > > Dear all, > I'm developing a tracking procedure which should manage to recognize > primary and prompt particle tracks. In order to calculate the efficiency > of my implementation, I would find a way to include (as findable tracks) > all primary tracks together with the secondaries which were produced > quite near to the primary vertex. > When I read the TParticle class, I encountered a fVx,y,z, members which > should help for the production vertex locating, but I found that this > vertex can be nealry everywhere! > The strange thing is that, studying the tracks recognized with the > Kalman algorithm for ALICE ITS, most of these recognized tracks seemed > to have their vertex located in all the space up to the RICH (!). > How can I get the information I need, then? > > Regards > > Alberto > > Roberto Barbera (mailto:roberto.barbera@ct.infn.it) Phone Catania: ++.39.095.71.95.232 | Phone CERN: ++.41.22.76.79739 Fax Catania: ++.39.095.38.30.23 | Fax CERN: ++.41.22.76.79480 WWW: http://alipc1.ct.infn.it/~barbera | Office CERN: 26-R-004
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