A model density of states for Quarks and Gluons in QGP

Abstract

We propose an algebraic form for the density of states of quarks and gluons in a Quark-Gluon Plasma (QGP) fireball in quasi-equilibrium with a hadronic medium as $\rho (k)=\frac{\alpha }{k}+\beta k+\delta k^2$, and determine the parameters $\alpha$, $\beta$ and $\delta$ using Lattice Gauge results on the velocity of sound in QGP. The behaviour of the resulting $\rho (k)$ can be easily compared with the thermodynamic data on QGP that is expected from LHC and other RHIC experiments. Our numerical result shows a linear rise of the value of $\rho (k)$ for $k\sim T\approx 160to180MeV$, which is significant, and throws light on the evolution of the QGP phase.

Comments: 7 pages, 2 figures LaTeX