Effect of finite chemical potential on QGP-Hadron phase transition in a statistical model of fireball formation

TL;DR

This paper investigates how finite chemical potentials influence the QGP-Hadron phase transition, showing that they smooth out the transition and support fireball formation, aligning with current understanding of the transition's nature.

Contribution

It extends a statistical model to include finite chemical potentials, revealing a transition from a weakly first order to a smooth crossover, consistent with recent consensus.

Findings

Finite chemical potentials smooth the phase transition.

Fireball formation occurs with radii of a few fermi.

Transition aligns with current understanding of QGP-Hadron transition.

Abstract

We study the effect of finite chemical potential for the QGP constituents in the Ramanathan et al. statistical model (Phys.Rev.C70, 027903,2004). While the earlier computations using this model with vanishing chemical potentials indicated a weakly first order phase transition for the system in the vicinity of 170 MeV (Pramana, 68, 757, 2007), the introduction of finite values for the chemical potentials of the constituents makes the transition a smooth roll over of the phases, while allowing fireball formation with radius of a few "fermi" to take place. This seems to be in conformity with the latest consensus on the nature of the QGP-Hadron phase transition. Keywords: Quark Gluon Plasma, Quark Hadron Phase Transition