A relativistic quantum approach to neutrino and antineutrino emission via the direct Urca process in strongly magnetized neutron-star matter

Tomoyuki Maruyama; A. Baha Balantekin; Myung-Ki Cheoun; Toshitaka Kajino; Motohiko Kusakabe; Grant J. Mathews

Physics Letters B (Jan 2022)

A relativistic quantum approach to neutrino and antineutrino emission via the direct Urca process in strongly magnetized neutron-star matter

Tomoyuki Maruyama,
A. Baha Balantekin,
Myung-Ki Cheoun,
Toshitaka Kajino,
Motohiko Kusakabe,
Grant J. Mathews

Affiliations

Tomoyuki Maruyama: College of Bioresource Sciences, Nihon University, Fujisawa 252-8510, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195, Japan; Corresponding author.
A. Baha Balantekin: Department of Physics, University of Wisconsin, Madison, WI 53706, USA; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Myung-Ki Cheoun: Department of Physics and OMEG Institute, Soongsil University, Seoul, 156-743, Republic of Korea; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Toshitaka Kajino: National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan; School of Physics, Int. Research Center for Big-Bang Cosmology and Element Genesis, Beihang University, Beijing 100083, China
Motohiko Kusakabe: School of Physics, Int. Research Center for Big-Bang Cosmology and Element Genesis, Beihang University, Beijing 100083, China; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Grant J. Mathews: Center of Astrophysics, Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

Journal volume & issue: Vol. 824
p. 136813

Abstract

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We study neutrino and antineutrino emission from the direct Urca process in neutron-star matter in the presence of strong magnetic fields. We calculate the neutrino emissivity of the direct Urca process, whereby a neutron converts to a proton, an electron and an antineutrino, or a proton-electron pair converts to a neutron-neutrino pair. We solve exact wave functions for protons and electrons in the states described with Landau levels. We find that the direct Urca process can satisfy the kinematic constraints even in density regions where this process could not normally occur in the absence of a magnetic field.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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