SELF-SIMILARITY OF NEGATIVE PARTICLE PRODUCTION IN Au + Au COLLISIONS AT STAR

摘要

Results of a new analysis of negative particle yields in Au + Au collisions obtained by the STAR Collaboration in the first phase of the RHIC Beam Energy Scan (BES) program in the framework of z-scaling approach are presented. The spectra were measured over a wide range of collision energy snn = 7.7—200 GeV and transverse momentum of produced particles for different centralities at IηI < 0.5. The concept of the z-scaling based on self-similarity, locality, and fractality of hadron interactions at a constituent level is verified. The constituent energy loss as a function of energy and centrality of collision and transverse momentum of inclusive particle was estimated.