z-Scaling: Search for Signatures of Phase Transition in Nuclear Matter

0574842 - ÚJF 2024 RIV US eng J - Článek v odborném periodiku
Tokarev, M. V. - Zborovský, Imrich
z-Scaling: Search for Signatures of Phase Transition in Nuclear Matter.
Physics of Particles and Nuclei. Roč. 54, č. 4 (2023), s. 640-646. ISSN 1063-7796. E-ISSN 1531-8559
Grant CEP: GA MŠMT LTT18021
Institucionální podpora: RVO:61389005
Klíčová slova: symmetry * high energy * nuclei * strange particles * scaling * phase transition
Obor OECD: Particles and field physics
Impakt faktor: 0.4, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1134/S1063779623040329

We present results of analysis of hadron production in p + p and Au + Au collisions obtained in the framework of z-scaling in searching for signatures of a phase transition in nuclear matter. The approach allows systematic analysis of experimental data on inclusive cross sections over a wide range of the collision energies, multiplicity densities, transverse momenta, and angles of various particles. The concept of the z -scaling is based on the principles of self-similarity, locality and fractality reflecting the general features of hadron interactions. The scaling function ?(z) depends on the self-similarity variable z and is expressed by the inclusive cross-section and the multiplicity density of produced particles. The variable z is a function of the momentum fractions and of the colliding objects carried by interacting hadron constituents and x(1) x (2 )depends on the fractions and of the scattered and recoil constituents carried by the inclusive particle and ya y b its recoil counterpart. There are three model parameters in the z-scaling approach. Structure of the colliding objects and fragmentation processes are characterized by the structural and fragmentation fractal dimensions d and e, respectively. The produced medium is described by a 'specific heat' c. The discontinuity of the model parameters is discussed from the point of view of searching for phase transitions in nuclear matter.
Trvalý link: https://hdl.handle.net/11104/0344777