Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 2: Heavy Ion Collisions and QCD Phases I

HK 2.6: Talk

Monday, March 27, 2017, 18:15–18:30, F 1

Performance studies for electron measurement with the CBM-TRD — •Etienne Bechtel — IKF,Frankfurt,Germany

A crucial performance aspect of the CBM-TRD is to achieve a sufficient pion suppression while maintaining a high electron efficency. This requires an adequate identification method and the likelihood method offers a comparable performance to the artifical neural network while at the same time allowing for a maximum of control and robustness. To employ this method one has to get very pure input information about the energy deposition of the particles inside the TRD. For electrons, this is done via careful topology cuts on photon conversions. We will present a simulation study of electron efficiencies, pion suppression and reconstruction efficiencies. Special attention is placed onto the study of intermediate mass di-leptons (1.5 GeV/c² < m_inv < 3.0 GeV/c²), which deliver an important physics case for the CBM-TRD, since they potentially provide access to the study of thermal medium radiation. A prerequisite for these studies is a good electron identification at high momenta which is provided by the CBM-TRD.