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Nuclear Theory

arXiv:0708.3436 (nucl-th)
[Submitted on 25 Aug 2007 (v1), last revised 25 Jan 2008 (this version, v2)]

Title:High-density Skyrmion matter and Neutron Stars

Authors:Prashanth Jaikumar (IMSc, Chennai), Manjari Bagchi (TIFR, Mumbai), Rachid Ouyed (U. Calgary)
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Abstract: We examine neutron star properties based on a model of dense matter composed of B=1 skyrmions immersed in a mesonic mean field background. The model realizes spontaneous chiral symmetry breaking non-linearly and incorporates scale-breaking of QCD through a dilaton VEV that also affects the mean fields. Quartic self-interactions among the vector mesons are introduced on grounds of naturalness in the corresponding effective field theory. Within a plausible range of the quartic couplings, the model generates neutron star masses and radii that are consistent with a preponderance of observational constraints, including recent ones that point to the existence of relatively massive neutron stars with mass M 1.7 Msun and radius R (12-14) km. If the existence of neutron stars with such dimensions is confirmed, matter at supra-nuclear density is stiffer than extrapolations of most microscopic models suggest.
Comments: 27 pages, 5 figures, AASTeX style; to be published in The Astrophysical Journal
Subjects: Nuclear Theory (nucl-th); Astrophysics (astro-ph)
Cite as: arXiv:0708.3436 [nucl-th]
  (or arXiv:0708.3436v2 [nucl-th] for this version)
  https://doi.org/10.48550/arXiv.0708.3436
Journal reference: Astrophys.J.678:360-368,2008
Related DOI: https://doi.org/10.1086/529510

Submission history

From: Prashanth Jaikumar [view email]
[v1] Sat, 25 Aug 2007 14:29:45 UTC (74 KB)
[v2] Fri, 25 Jan 2008 10:24:26 UTC (62 KB)
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