Nuclear three-body force effect on a kaon condensate in neutron star matter
- 17 November 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 70 (5), 055802
- https://doi.org/10.1103/physrevc.70.055802
Abstract
We explore the effects of a microscopic nuclear three-body force on the threshold baryon density for kaon condensation in chemical equilibrium neutron star matter and on the composition of the kaon condensed phase in the framework of the Brueckner-Hartree-Fock approach. Our results show that the nuclear three-body force affects strongly the high-density behavior of nuclear symmetry energy and consequently reduces considerably the critical density for kaon condensation provided that the proton strangeness content is not very large. The dependence of the threshold density on the symmetry energy becomes weaker as the proton strangeness content increases. The kaon condensed phase of neutron star matter turns out to be proton rich instead of neutron rich. The three-body force has an important influence on the composition of the kaon condensed phase. Inclusion of the three-body force contribution in the nuclear symmetry energy results in a significant reduction of the proton and kaon fractions in the kaon condensed phase which is more proton-rich in the case of no three-body force. Our results are compared to other theoretical predictions by adopting different models for the nuclear symmetry energy. The possible implications of our results for the neutron star structure are also briefly discussed.This publication has 53 references indexed in Scilit:
- Strange particles in dense matter and kaon condensatesNuclear Physics A, 1998
- Kaon Production in Heavy-Ion Collisions and Maximum Mass of Neutron StarsPhysical Review Letters, 1997
- Kaons in dense matter, kaon production in heavy-ion collisions, and kaon condensation in neutron starsNuclear Physics A, 1997
- Kaon condensation in dense stellar matterPhysics Reports, 1996
- An effective chiral lagrangian approach to kaon-nuclear interactions Kaonic atom and kaon condensationNuclear Physics A, 1995
- A novel mechanism for kaon condensation in neutron star matterPhysics Letters B, 1992
- Cooling of neutron starsReviews of Modern Physics, 1992
- First-order phase transitions with more than one conserved charge: Consequences for neutron starsPhysical Review D, 1992
- Kaon condensation in nuclear matterPhysics Letters B, 1991
- Strange goings on in dense nucleonic matterPhysics Letters B, 1986