Kaon condensation and lambda-nucleon loop in the relativistic mean-field approach
Tipo
Artigo
Data de publicação
2005
Periódico
Nuclear Physics A
Citações (Scopus)
17
Autores
Maruyama T.
Muto T.
Tatsumi T.
Tsushima K.
Thomas A.W.
Muto T.
Tatsumi T.
Tsushima K.
Thomas A.W.
Orientador
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Programa
Resumo
The possibility of kaon condensation in high-density symmetric nuclear matter is investigated including both s- and p-wave kaon-baryon interactions within the relativistic mean-field (RMF) theory. Above a certain density, we have a collective K̄s state carrying the same quantum numbers as the antikaon. The appearance of the K̄s state is caused by the time component of the axial-vector interaction between kaons and baryons. It is shown that the system becomes unstable with respect to condensation of K - K̄s pairs. We consider how the effective baryon masses affect the kaon self-energy coming from the time component of the axial-vector interaction. Also, the role of the spatial component of the axial-vector interaction on the possible existence of the collective kaonic states is discussed in connection with Λ-mixing effects in the ground state of high-density matter. Implications of K K̄s condensation for high-energy heavy-ion collisions are briefly mentioned. © 2005 Elsevier B.V. All rights reserved.