Derenovskaya, V. V. Ivanov Laboratory of Information Technologies Joint Institute for Nuclear Research 6, Joliot-Curie str., Dubna, Moscow region, Russia, 141980 The key problem is a fast and reliable electron/positron identification using the energy losses of charged particles in the Transition Radiation Detector. <...> An analysis of the application features and a comparison of power of two methods to solve this task are given: an artificial A procedure for selection of J/ψ →e+e− decays registered by the CBM set-up is presented. neuron network (ANN) and a ωk on the ωk n goodness-of-fit criterion. <...> The choice of the approach based n goodness-of-fit criterion is explained. transition radiation detector TRD, selection of J/ψ →e+e− decays. 1. <...> Inside the dipole magnet there is a silicon tracking system STS which provides track and vertex reconstruction and track momentum determination. <...> The ring imaging cherenkov RICH and the transition radiation detectors TRD have to detect electrons. <...> CBM experimental setup (mostly pions) are one of the key tasks of the CBM. <...> The measurements of the process of J/ψ →e++e− in the predominant background Received 22nd September, 2013. <...> The J/ψ reconstruction procedure 351 The J/ψ reconstruction is based on the registration of its decay products in the STS, RICH, TRD and TOF detectors. <...> The procedure includes several steps [2]: 1) track and momentum reconstruction of charged particles with STS; 2) electron/positron identification; the RICH and TRD are applied to solve this task; TOF is also used to separate hadrons from electrons via their time of flight from the target to RPC; 3) only electrons and positrons emitted from the target (χprim ¡ 3,5) and with a transverse momentum more than 1 GeV/c are selected; 4) combination of electrons and positrons to construct a J/ψ — candidate; the KFParticle [3] package is used; 5) the construction of the invariant mass spectrum. 3. <...> Electron identification in the TRD The main step in the J/ψ reconstruction procedure is an electron/positron identification using the energy losses of charged particles in the TRD. <...> In paper [4], a comparative analysis of different methods, including those based on ANN [5] and ωk goodness-of-fit criterion, have been realized. n It is <...>