Medium modifications of antikaons in dense matter
Abstract
We investigate the modification of antikaons in isospin symmetric and asymmetric nuclear matter. Using the leading s-wave couplings of the SU(3) chiral meson-baryon Lagrangian we solve the coupled channel kaon-nucleon scattering equation selfconsistently. The in-medium antikaon propagator is calculated for different densities and different proton/neutron ratios. The spectral function of the antikaon is found to be broadened strongly, and its mass is shifted downward significantly. However, comparing the effective in-medium mass of the antikaon to the relevant charge chemical potential of neutron star matter, we find that kaon condensation is unlikely to occur in neutron stars.
Keywords
Cite
@article{arxiv.nucl-th/0504056,
title = {Medium modifications of antikaons in dense matter},
author = {Th. Roth and M. Buballa and J. Wambach},
journal= {arXiv preprint arXiv:nucl-th/0504056},
year = {2007}
}
Comments
29 pages, 35 figures; v2: additional curves for symmetric matter in Figs 14,15; references added