Particle identification for RHIC's Energy Scan*

In an effort to search for a possible critical point of the QCD phase transition between Quark-Gluon Plasma and hadronic matter, the Relativistic Heavy Ion Collider (RHIC) has conducted an energy scan, taking Au+Au data at multiple collision energies in 2010. In this talk we will discuss the experimental technique employed for identification of pions, kaons, and (anti)proton at low transverse momenta ($<$1 GeV/c) with STAR Time Projection Chamber (TPC) detector. To explore antiparticle to particle ratios, and their evolution with beam energy, various aspects of data analysis and quality assurance will be discussed with regard to this topic.