Kaonic modes in hyperonic matter and p-wave kaon condensation

✍ Scribed by Takumi Muto

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 380 KB
• Volume: 697
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(01)01226-x

✦ Synopsis

Kaon excitations (kaonic modes) are investigated in hyperonic matter, where hyperons ( , -, -) 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 is more abundant than the proton at high baryon density, a proton-particle--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.