In-medium properties of kaons in a chiral approach
Abstract
The first order self-energy corrections of the kaon in the symmetric nuclear matter are calculated from kaon-nucleon scattering matrix elements using a chiral Lagrangian within the framework of relativistic mean field approximation. It shows that the effective mass and the potential of K^+ meson are identical with those of K^- meson in the nuclear matter, respectively. The effective mass of the kaon in the nuclear matter decreases with the nuclear density increasing, and is not relevant to the kaon-nucleon Sigma term. The kaon-nucleus potential is positive and increases with the nuclear density. Moreover, the influence of the resonance on the -nucleus potential due to the re-scattering term is discussed. Our results indicate the K^- meson could not be bound in the nuclei even if the contribution of resonance is considered.
Keywords
Cite
@article{arxiv.nucl-th/0701085,
title = {In-medium properties of kaons in a chiral approach},
author = {Yue-Lei Cui and Bao-Xi Sun},
journal= {arXiv preprint arXiv:nucl-th/0701085},
year = {2008}
}
Comments
8 pages, 3 figures, The contribution of Lambda(1405) resonance in the rescattering process to the K-nucleus potential is discussed in the revised version