Nuclear pasta phases within the quark-meson coupling model

Guilherme Grams, Alexandre M. Santos, Prafulla K. Panda, Constança Providência, and Débora P. Menezes
Phys. Rev. C 95, 055807 – Published 19 May 2017

Abstract

In this work, the low-density regions of nuclear and neutron star matter are studied. The search for the existence of nuclear pasta phases in this region is performed within the context of the quark-meson coupling (QMC) model, which incorporates quark degrees of freedom. Fixed proton fractions are considered, as well as nuclear matter in β equilibrium at zero temperature. We discuss the recent attempts to better understand the surface energy in the coexistence phases regime and we present results that show the existence of the pasta phases subject to some choices of the surface energy coefficient. We also analyze the influence of the nuclear pasta on some neutron star properties. The equation of state containing the pasta phase will be part of a complete grid for future use in supernova simulations.

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  • Received 4 November 2016
  • Revised 21 March 2017

DOI:https://doi.org/10.1103/PhysRevC.95.055807

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Guilherme Grams1, Alexandre M. Santos1, Prafulla K. Panda2, Constança Providência3, and Débora P. Menezes1

  • 1Departamento de Física, CFM, Universidade Federal de Santa Catarina, Florianópolis, Brazil
  • 2Department of Physics, Utkal University, Bhubaneswar-751 004, India
  • 3CFisUC, Department of Physics, University of Coimbra, P-3004-516 Coimbra, Portugal

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Issue

Vol. 95, Iss. 5 — May 2017

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