Neutron-proton mass difference in nuclear matter

U. -G. Meißner; A. M. Rakhimov; A. Wirzba; U. T. Yakhshiev

doi:10.1140/epja/i2006-10274-6

EPJ

Neutron-proton mass difference in nuclear matter

U. -G. Meißner¹^,2, A. M. Rakhimov³, A. Wirzba²^* and U. T. Yakhshiev²^,4

¹ Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, D-53115, Germany
² Forschungszentrum Jülich, Institut für Kernphysik (Theorie), D-52425, Jülich, Germany
³ Institute of Nuclear Physics, Academy of Sciences of Uzbekistan, 132, Tashkent, Uzbekistan
⁴ Physics Department and Institute of Applied Physics, National University of Uzbekistan, 174, Tashkent, Uzbekistan

Received: 20 November 2006
Accepted: 20 February 2007
Published online: 12 March 2007

Abstract

Isospin-breaking effects in nuclear matter are studied in the framework of a medium-modified Skyrme model. The proposed effective Lagrangian incorporates both the medium influence of the surrounding nuclear environment on the single nucleon properties and an explicit isospin-breaking effect in the mesonic sector. The approach predicts that the neutron-proton mass difference decreases in isospin-symmetric nuclear matter but by a very small amount only.

PACS: 12.39.Dc Skyrmions – / 14.20.Dh Protons and neutrons – / 21.65.+f Nuclear matter –

Joint Annual Meeting of the Swiss and Austrian Physical Societies
26-30 August 2019
Zurich, Switzerland

EPJ

Neutron-proton mass difference in nuclear matter

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