Measurement of azimuthal anisotropy of proton and pion in Au+Au &[root]s_NN= 4.5 GeV Fixed Target

The RHIC Beam Energy Scan (BES) program is proposed to search for the Quark Gluon Plasma (QGP) and for a possible Quantum Chromo Dynamics (QCD) critical point to study the nature of the phase transition from partonic to hadronic matter. Results from the CERN SPS have been used to support the hypothesis that the onset of the phase transition occurs near √s_NN = 7 GeV. The lowest beam energy accessible at RHIC in collider mode is 7.7 GeV, but Fixed-Target program can achieve lower collision energy √s_NN = 4.5 GeV. At low collision energy, the directed flow is expected to be large and is sensitive to the equation of state and nature of the phase transition. In this talk, we will present azimuthal anisotropies of protons and pions as a function of centrality, p_T and rapidity.