2005/04/18 by Th. Roth, Thomas Roth, Roth, Th. +4
Physics and Astronomy · #Atomic and Molecular Physics #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/0504056
29 pages, 35 figures; v2: additional curves for symmetric matter in Figs 14,15; references added
arxiv created 2005/05/04 · arxiv updated 2009/12/01
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.