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type: channel
description: GSI Helmholtzzentrum für Schwerionenforschung
items: Likelihood in PndMvdAdvancedPid Algorithm
items: Re: Likelihood in PndMvdAdvancedPid Algorithm

Likelihood in PndMvdAdvancedPid Algorithm
type: item
description: Hi MVD family! I have a question about PndMvdAdvancedPidAlgo::CalcLikelihood Is there some limitation to calculate likelihood with certain hypothesis. I found that upto 2.4 GeV some values of likelihoods can be found, but over 4 GeV all values are 0.2. Is there some reason? what is the meaning of 0.2, is it default value? Thanks, Donghee
creator: donghee
date: 2010-03-31T08:21:15-00:00

Re: Likelihood in PndMvdAdvancedPid Algorithm
type: item
description: Well, MVD dE/dx works only at low momenta, belox 800 MeV/c. With higher momentum values all the likelihood should be set to the same value (0.2 * 5 = 1), because all the particle hyp are equivalent.
creator: StefanoSpataro
date: 2010-03-31T09:16:14-00:00