We calculate the spin-dependent Fermi liquid parameters (FLPs), single-particle energies, and energy densities of various spin states of polarized quark matter. The expressions for the incompressibility $K$ and sound velocity $c_1$ in terms of the spin-dependent FLPs and polarization parameter ξ are derived. Estimated values of $K$ and $c_1$ reveal that the equation of state of the polarized matter is stiffer than the unpolarized one. Finally, we investigate the possibility of the spin polarization (ferromagnetism) phase transition.

• Received 2 September 2008

DOI:https://doi.org/10.1103/PhysRevC.79.015205