Spectra of negative particles in Au+Au collisions from BES-I at RHIC and z-scaling
1 Joint Institute for Nuclear Research, 141980 Dubna, Russia
2 Nuclear Physics Institute of the CAS, 250 68 Řež, Czech Republic
Published online: 3 April 2019
Negative particle yields in Au + Au collisions obtained by the STAR Collaboration from BES-I at RHIC are analyzed in the framework of the z-scaling approach. The spectra were measured over a wide range of collision energy and transverse momentum of produced particles for different centralities at . The scaling behavior of the spectra as a function of the collision energy and centrality in z-presentation is verified. The constituent energy loss in dependence on the energy and centrality of collision and transverse momentum of inclusive particle is estimated. New indication on self-similarity of fractal structure of nuclei and fragmentation process is found. A discontinuity of the model parameters - fractal and fragmentation dimensions and specific heat - is considered from the point of view of a phase transition in nuclear matter.
© The Authors, published by EDP Sciences, 2019
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