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Phys. Rev. D 63, 121702(R) (2001) [5 pages]

Small, dense quark stars from perturbative QCD

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Eduardo S. Fraga and Robert D. Pisarski
Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000

Jürgen Schaffner-Bielich
RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000

Received 6 February 2001; published 25 May 2001

As a model for nonideal behavior in the equation of state of QCD at high density, we consider cold quark matter in perturbation theory. To second order in the strong coupling constant αs, the results depend sensitively on the choice of the renormalization mass scale. Certain choices of this scale correspond to a strongly first order chiral transition, and generate quark stars with maximum masses and radii approximately half that of ordinary neutron stars. At the center of these stars, quarks are essentially massless.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.63.121702
DOI:
10.1103/PhysRevD.63.121702
PACS:
12.38.Bx, 12.38.Mh, 26.60.+c, 97.60.Jd