Physics – Nuclear Physics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996nupha.597..645f&link_type=abstract
Nuclear Physics A, Volume 597, Issue 4, p. 645-671.
Physics
Nuclear Physics
43
Scientific paper
Kaon condensation in dense neutron star matter is investigated on the basis of current algebra and PCAC (partially conserved axial-vector current). Second-order perturbation effects are incorporated naturally within this framework, which are necessary to be consistent with KN scattering data, but we find it hardly affects K- condensation. The excitation energy of kaons in a nuclear medium is examined by combining the framework with a relativistic mean-field theory. Next we obtain the equation of state of the K- -condensed phase in neutron star matter, and clarify characteristic features of the system. There can occur a first-order phase transition from the normal phase to the K- -condensed one. Subsequently bulk structure of kaon-condensed neutron stars is studied. Softening of the equation of state due to kaon condensation has a large influence on the internal structure of the neutron star. As a dynamical property associated with the first-order phase transition, the energy release due to a collapse from a metastable configuration to a stable kaon-condensed one is estimated. Its implications for the gamma-ray bursts are briefly mentioned.
Fujii Hirotsugu
Maruyama Tomoyuki
Muto Takumi
Tatsumi Toshitaka
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