Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-12-10
Phys.Rev.D81:105021,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
51 pages, 11 figures, v2: minor modifications and additional references
Scientific paper
10.1103/PhysRevD.81.105021
We perform an O(alpha_s^2) perturbative calculation of the equation of state of cold but dense QCD matter with two massless and one massive quark flavor, finding that perturbation theory converges reasonably well for quark chemical potentials above 1 GeV. Using a running coupling constant and strange quark mass, and allowing for further non-perturbative effects, our results point to a narrow range where absolutely stable strange quark matter may exist. Absent stable strange quark matter, our findings suggest that quark matter in compact star cores becomes confined to hadrons only slightly above the density of atomic nuclei. Finally, we show that equations of state including quark matter lead to hybrid star masses up to M~2M_solar, in agreement with current observations. For strange stars, we find maximal masses of M~2.75M_solar and conclude that confirmed observations of compact stars with M>2M_solar would strongly favor the existence of stable strange quark matter.
Kurkela Aleksi
Romatschke Paul
Vuorinen Aleksi
No associations
LandOfFree
Cold Quark Matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cold Quark Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cold Quark Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-594030