Nuclear thermodynamics from chiral low-momentum interactions

Corbinian Wellenhofer, Jeremy W. Holt, Norbert Kaiser, and Wolfram Weise
Phys. Rev. C 89, 064009 – Published 30 June 2014

Abstract

We investigate the thermodynamic equation of state of isospin-symmetric nuclear matter with microscopic nuclear forces derived within the framework of chiral effective field theory. Two- and three-body nuclear interactions constructed at low-resolution scales form the basis for a perturbative calculation of the finite-temperature equation of state. The nuclear force models and many-body methods are benchmarked against bulk properties of isospin-symmetric nuclear matter at zero temperature, which are found to be well reproduced when chiral nuclear interactions constructed at the lowest resolution scales are employed. The calculations are then extended to finite temperatures, where we focus on the liquid-gas phase transition and the associated critical point. The Maxwell construction is applied to construct the physical equation of state, and the value of the critical temperature is determined to be Tc=17.2–19.1 MeV, in good agreement with the value extracted from multifragmentation reactions of heavy ions.

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  • Received 8 April 2014

DOI:https://doi.org/10.1103/PhysRevC.89.064009

©2014 American Physical Society

Authors & Affiliations

Corbinian Wellenhofer1, Jeremy W. Holt2, Norbert Kaiser1, and Wolfram Weise1,3

  • 1Physik Department, Technische Universität München, D-85747 Garching, Germany
  • 2Department of Physics, University of Washington, Seattle, Washington 98195, USA
  • 3ECT*, Villa Tambosi, I-38123 Villazzano (TN), Italy

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Vol. 89, Iss. 6 — June 2014

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