Fractal Entropy of Nuclear Medium Probed by K.sup.0./sup..sub.S./sub. Mesons Produced in AuAu Collisions at RHIC

0573717 - ÚJF 2024 RIV CH eng J - Journal Article
Tokarev, M. V. - Zborovský, Imrich
Fractal Entropy of Nuclear Medium Probed by K⁰_S Mesons Produced in AuAu Collisions at RHIC.
PHYSICS. Roč. 5, č. 2 (2023), s. 537-546. E-ISSN 2624-8174
Institutional support: RVO:61389005
Keywords : high energy heavy ion collisions * entropy in heavy ion physics * fractality in heavy ion physics * RHIC
OECD category: Particles and field physics
Impact factor: 1.6, year: 2022
Method of publishing: Open access
https://doi.org/10.3390/physics5020038

In this paper, we review our findings concerning fractal entropy of microscopic configurations corresponding to the production of K0S mesons in AuAu collisions in the z-scaling approach. The entropy is expressed via structural and fragmentation fractal dimensions, and model parameter cAuAu is interpreted as a specific heat of produced medium. These parameters are related to the respective momentum fractions of the colliding nuclei, the momentum fractions of the scattered constituents that fragment into the produced hadrons, and the multiplicity density of negative particles in the central interaction region. The dependence of the entropy on the collision energy over the range of 7.7-200 GeV for most central and most peripheral events is studied as a function of the transverse momentum of the produced K0S mesons. A non-trivial dependence of the entropy on the collision energy with decreasing transverse momentum is found. This reflects the irregularity of the behavior of the specific heat, cAuAu, and can point to a manifestation of phase transition in nuclear matter.
Permanent Link: https://hdl.handle.net/11104/0344094