Thermodynamics of isospin-asymmetric nuclear matter from chiral effective field theory

Corbinian Wellenhofer, Jeremy W. Holt, and Norbert Kaiser
Phys. Rev. C 92, 015801 – Published 6 July 2015

Abstract

The density and temperature dependence of the nuclear symmetry free energy is investigated using microscopic two- and three-body nuclear potentials constructed from chiral effective field theory. The nuclear force models and many-body methods are benchmarked to properties of isospin-symmetric nuclear matter in the vicinity of the saturation density as well as the virial expansion of the neutron matter equation of state at low fugacities. The free energy per particle of isospin-asymmetric nuclear matter is calculated assuming a quadratic dependence of the interaction contributions on the isospin asymmetry. The spinodal instability at subnuclear densities is examined in detail.

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  • Received 1 April 2015
  • Revised 29 May 2015

DOI:https://doi.org/10.1103/PhysRevC.92.015801

©2015 American Physical Society

Authors & Affiliations

Corbinian Wellenhofer1,*, Jeremy W. Holt2,†, and Norbert Kaiser1,‡

  • 1Physik Department, Technische Universität München, D-85747 Garching, Germany
  • 2Department of Physics, University of Washington, Seattle, Washington 98195, USA

  • *corbinian.wellenhofer@tum.de
  • jwholt.phys@gmail.com
  • n.kaiser@ph.tum.de

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Vol. 92, Iss. 1 — July 2015

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