POLAR DISTRIBUTION OF FINAL-STATE PARTICLES IN HIGH-ENERGY HEAVY-ION COLLISIONS

The anisotropy of azimuthal distributions for final state particles in center-of-mass systems where the z axis is rotated to various polar a ngle in the reaction plane is studied, and a method to determine the f low angle is proposed. Studying the polar angle distributions for coll isions of 1.2AGeV Ar+KCl, 1.2AGeV Ne+NaF, and 2.1AGeV Ne+NaF at the Be valac streamer chamber in the coordinate systems with the z axis rotat ed to the how angle, we can estimate the fraction of the anisotropic e mission particles to all the final state particles and the degree of c oncentration around the flow direction quantitatively.