Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-02-24
Nucl.Phys.A760:319-345,2005
Physics
Nuclear Physics
Nuclear Theory
27 pages text, 8 figures
Scientific paper
10.1016/j.nuclphysa.2005.06.008
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 ${\bar K}_s$ state carrying the same quantum numbers as the antikaon. The appearance of the ${\bar K}_s$ 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 $K$-${\bar K}_s$ 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 $\Lambda$-mixing effects in the ground state of high-density matter. Implications of $K{\bar K}_s$ condensation for high-energy heavy-ion collisions are briefly mentioned.
Maruyama Tomoyuki
Muto Takumi
Tatsumi Toshitaka
Thomas Anthony W.
Tsushima Kazuo
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