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Title: Antikaon condensation and deconfinement phase transition in neutron stars

Antikaon condensation and deconfinement phase transition in neutron stars are investigated in a chiral hadronic model (also referred as to the FST model) for the hadronic phase and in the MIT bag model for the deconfined quark matter phase. It is shown that the existence of quark matter phase makes antikaon condensation impossible in neutron stars. The properties of neutron stars are sensitive to the bag constant. For the small values of the bag constant, the pure quark matter core appears and hyperons are strongly suppressed in neutron stars, whereas for the large bag constant, the hadron-quark mixed phase exists in the center of neutron stars. The maximum masses of neutron stars with the quark matter phase are lower than those without the quark matter phase; meanwhile, the maximum masses of neutron stars with the quark matter phase increase with the bag constant.
Authors:
 [1] ; ;  [1] ;  [2] ;  [3] ;  [2] ;  [1] ;  [2] ;  [2]
  1. Department of Technical Physics and MOE Laboratory of Heavy Ion Physics, Peking University, Beijing 100871 (China)
  2. (China)
  3. Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000 (China)
Publication Date:
OSTI Identifier:
20771561
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.73.055803; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANTIKAONS; BAG MODEL; BOSE-EINSTEIN CONDENSATION; CHIRALITY; HYPERONS; MASS; NEUTRON STARS; PHASE TRANSFORMATIONS; QUARK MATTER; QUARKS