Self-similarity of negative particle production from the Beam Energy Scan Program at STAR

Abstract

We present the spectra of negative charged particle production in Au+Au collisions from STAR for the first phase of the RHIC Beam Energy Scan Program measured over a wide range of collision energy sqrt s{NN}=7.7-200 GeV, and transverse momentum of produced particle in different centralities at |eta|<0.5. The spectra demonstrate strong dependence on collision energy which enhances with pT. An indication of self-similarity of negative charged particle production in Au+Au collisions is found. The constituent energy loss as a function of energy and centrality of collisions and transverse momentum of inclusive particle was estimated in the $z$-scaling approach. The energy dependence of the model parameters - the fractal and fragmentation dimensions and "specific heat", was studied.

13 pages, LaTeX, 16 figures, Presented at the International Conference "HADRON STRUCTURE'15", 29 June -- 3 July, 2015, Horny Smokovec, Slovak Republic. Preprint JINR E1-2015-83

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