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Neutron-proton mass difference in isospin-asymmetric nuclear matter

  • Regular Article - Hadron Physics
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Abstract.

Isospin-breaking effects in the baryonic sector are studied in the framework of a medium-modified Skyrme model. The neutron-proton mass difference in infinite, asymmetric nuclear matter is discussed. In order to describe the influence of the nuclear environment on the skyrmions, we include energy-dependent charged and neutral pion optical potentials in the s - and p -wave channels. The present approach predicts that the neutron-proton mass difference is mainly dictated by its strong part and that it strongly decreases in neutron matter.

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Authors and Affiliations

  1. Helmholtz-Institut für Strahlen- und Kernphysik (Theorie), Universität Bonn, D-53115, Germany

    U. -G. Meißner

  2. Institut für Kernphysik (Theorie), Forschungszentrum Jülich, D-52425, Jülich, Germany

    U. -G. Meißner, A. Wirzba & U. T. Yakhshiev

  3. Institute of Nuclear Physics, Academy of Sciences of Uzbekistan, Tashkent-132, Uzbekistan

    A. M. Rakhimov

  4. Institute of Physics and Applied Physics, Yonsei University, 120-749, Seoul, Korea

    A. M. Rakhimov

  5. Physics Department and Institute of Applied Physics, National University of Uzbekistan, Tashkent-174, Uzbekistan

    U. T. Yakhshiev

Authors
  1. U. -G. Meißner
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  2. A. M. Rakhimov
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  3. A. Wirzba
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  4. U. T. Yakhshiev
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Correspondence to A. Wirzba.

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A. Schäfer

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Meißner, U.G., Rakhimov, A.M., Wirzba, A. et al. Neutron-proton mass difference in isospin-asymmetric nuclear matter. Eur. Phys. J. A 32, 299–309 (2007). https://doi.org/10.1140/epja/i2007-10390-9

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  • DOI: https://doi.org/10.1140/epja/i2007-10390-9

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