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Phys. Rev. C 60, 025801 (1999) [11 pages]

Neutron stars and quark phases in the Nambu–Jona-Lasinio model

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Klaus Schertler* and Stefan Leupold
Institut für Theoretische Physik, Universität Giessen, D-35392 Giessen, Germany

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

Received 14 January 1999; published 30 June 1999

We study the possible existence of deconfined quark matter in the interior of neutron stars using the Nambu–Jona-Lasinio model to describe the quark phase. We find that typical neutron stars with masses around 1.4 solar masses do not possess any deconfined quark matter in their center. This can be traced back to the property of the NJL model which suggests a large constituent strange quark mass over a wide range of densities.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.60.025801
DOI:
10.1103/PhysRevC.60.025801
PACS:
26.60.+c, 12.39.-x, 12.38.Mh

*Electronic address: klaus.schertler@theo.physik.uni-giessen.de