PHYSICS PERFORMANCE STUDIES FOR ANISOTROPIC FLOW MEASUREMENTS IN THE CBM EXPERIMENT AT FAIR

摘要

The Compressed Baryonic Matter (CBM) experiment at FAIR is aimed at studying the area of the QCD phase diagram at high net baryon densities and moderate temperatures using collisions of heavy ions at center-of-mass energies of a few GeV per nucleon. Anisotropic transverse flow is among the key observables to study the properties of matter created in such collisions. The CBM performance for anisotropic flow measurements is studied with Monte Carlo simulations using collisions of gold ions at lab momentum of 10A GeV/c employing UrQMD event generator. Different combinations of PSD module groups are used to investigate the possible systematic biases in flow measurement and to study the effects of detector azimuthal non-uniformity. The resulting performance of the CBM for flow measurements is demonstrated for directed flow of charged pions as a function of rapidity and transverse momentum.