Two Flavor Baryon Number Susceptibilities of Non-equilibrium State

TL;DR

This paper investigates baryon number susceptibilities in non-equilibrium states of quark-gluon plasma, considering temperature gradients and quasi-particle thermal masses, to better match experimental conditions in heavy ion collisions.

Contribution

It introduces a non-equilibrium model with temperature gradients and quasi-particle masses to calculate baryon number susceptibilities, extending beyond thermal equilibrium assumptions.

Findings

Results show a gap in susceptibility values.

Centrality dependence observed in the results.

Potential link between susceptibilities and temperature gradients.

Abstract

In this paper, to be closer to the realities of the relativistic heavy ion collisions than the thermal equilibrium assumption often used in the calculations of baryon number susceptibilities, the creatures of the collisions are treated as isotropic systems with temperature gradient. In addition, the quarks are thought as the quasi-particles with thermal masses. By doing these and according to Boltzmann transport equation, we get our results of the experimental observables $S\sigma$ and $\kappa\sigma^2$. We found that the results show a gap in value and a centrality dependence, which might indicate the relation between the baryon number susceptibilities and the temperature gradient in QGP.