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The European Physical Journal A

, Volume 31, Issue 3, pp 357–364 | Cite as

Neutron-proton mass difference in nuclear matter

  • U. -G. Meißner
  • A. M. Rakhimov
  • A. Wirzba
  • U. T. Yakhshiev
Regular Article - Hadron Physics

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 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2007

Authors and Affiliations

  • U. -G. Meißner
    • 1
    • 2
  • A. M. Rakhimov
    • 3
  • A. Wirzba
    • 2
  • U. T. Yakhshiev
    • 2
    • 4
  1. 1.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie)Universität BonnGermany
  2. 2.Forschungszentrum JülichInstitut für Kernphysik (Theorie)JülichGermany
  3. 3.Institute of Nuclear PhysicsAcademy of Sciences of UzbekistanTashkentUzbekistan
  4. 4.Physics Department and Institute of Applied PhysicsNational University of UzbekistanTashkentUzbekistan

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