Baryon number conservation and enforced electric charge neutrality for bulk viscosity in quark matter

Abstract

General constraints on fluid velocity divergences for particles in quark matter are derived from baryon number conservation and enforced electric charge neutrality. A new oscillation pattern in three-flavor normal quark matter satisfying these conditions is found and its bulk viscosity is calculated. The result may have astrophysical implication for maximum rotation frequencies of compact stars.

Comments: ReVTex 4, 5 pages, 3 figures; some comments added; accepted version to PRD