Kaonic modes in hyperonic matter and p-wave kaon condensation
نویسنده
چکیده
Kaon excitations (kaonic modes) are investigated in hyperonic matter, where hyperons (Λ, Σ, Ξ ) are mixed in the ground state of neutron-star matter. P -wave kaon-baryon interactions as well as the s-wave interactions are taken into account within chiral effective Lagrangian, and the nonrelativistic effective baryon-baryon interactions are incorporated. When the hyperon Λ is more abundant than the proton at high baryon density, a proton-particle-Λ-hole mode, which has the K+ quantum number, appears in addition to other particle-hole modes with the K quantum number. It is shown that the system becomes unstable with respect to a spontaneous creation of a pair of the particle-hole modes with K+ and K quantum numbers, stemming from the p-wave kaon-baryon interaction. The onset density of this p-wave kaon condensation may be lower than that of the s-wave K condensation. PACS: 05.30.Jp, 11.55.Fv, 13.75.Jz, 26.60.+c
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Interplay between kaon condensation and hyperons in highly dense matter
Possible coexistence and/or competition of kaon condensation with hyperons are investigated in hyperonic matter, where hyperons are mixed in the ground state of neutron-star matter. The formulation is based on the effective chiral Lagrangian for the kaon-baryon interaction and the nonrelativistic baryon-baryon interaction model. First, the onset condition of the s-wave kaon condensation realize...
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