What Can We Learn from Reaction Zone in Relativistic Nucleus-Nucleus Collisions?

TL;DR

This paper introduces the 'zone of reactions' concept to analyze the space-time structure of relativistic nucleus-nucleus collisions, helping identify key freeze-out hypersurfaces in the evolving system.

Contribution

It applies the 'zone of reactions' framework to study collision dynamics and determine freeze-out hypersurfaces in relativistic nuclear interactions.

Findings

Identification of hot, cold, and residual interaction zones.

Method to determine chemical and kinetic freeze-out hypersurfaces.

Enhanced understanding of space-time evolution in nuclear collisions.

Abstract

We apply the ``zone of reactions'' as a tool in studying the interacting system formed in a collision of relativistic nuclei. With the use of the intensity of collisions of particles (the number of collisions in unit volume per unit time), we study the space-time structure of a fireball. In this approach, three basic regions for the evolution of a system are separated by the scale of the intensity of collisions: the zone of a hot fireball, the zone of a cold fireball, and the zone of residual interaction. It is shown that the conception of a zone of reactions can be used for the determination of the hypersurfaces of a chemical freeze-out and a sharp kinetic freeze-out.