Spectra of negative particles in Au plus Au collisions from BES-I at RHIC and z-scaling

0532530 - ÚJF 2021 RIV FR eng C - Conference Paper (international conference)
Tokarev, M. V. - Kechechyan, A. - Zborovský, Imrich
Spectra of negative particles in Au plus Au collisions from BES-I at RHIC and z-scaling.
EPJ Web of Conferences. Vol. 204. Les Ulis: EDP Sciences, 2019, č. článku 06001. ISSN 2100-014X.
[24th International Baldin Seminar on High Energy Physics Problems - Relativistic Nuclear Physics and Quantum Chromodynamics (Baldin ISHEPP). Dubna (RU), 17.09.2018-22.09.2018]
R&D Projects: GA MŠMT LTT18021
Institutional support: RVO:61389005
Keywords : heavy ions collisions * RHIC * z-scaling
OECD category: Particles and field physics

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 root s(NN) = 7.7 - 200 GeV and transverse momentum of produced particles for different centralities at vertical bar eta vertical bar < 0.5. 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.
Permanent Link: http://hdl.handle.net/11104/0310996