Bjorken model with Freeze Out

TL;DR

This paper presents a unified model combining the Bjorken scenario with freeze out equations, allowing for finite-time freeze out in relativistic heavy ion collisions, and analyzes its effects on particle distribution functions.

Contribution

It introduces a novel unified model that incorporates finite-time freeze out into the Bjorken scenario, providing a more realistic description of the freeze out process.

Findings

Model is fully solved for a pion gas.

Post freeze out distribution depends on freeze out time.

Finite freeze out time affects particle distributions.

Abstract

The freeze out of the expanding systems, created in relativistic heavy ion collisions, is discussed. We combine Bjorken scenario with earlier developed freeze out equations into a unified model. The important feature of the proposed model is that physical freeze out is completely finished in a finite time, which can be varied from 0 (freeze out hypersurface) to infinity. The dependence of the post freeze out distribution function on this freeze out time will be studied. As an example model is completely solved and analyzed for the gas of pions.