ABSTRACT The deconfinement phase transition from ha-dronic matter to quark matter in the interior of compact stars is investigated. The hadronic phase is described in the framework of relativistic mean-field (RMF) theory, when also the scalar-isovector δ-meson effective field is taken into account. The MIT bag model for describing a quark phase is used. The changes of the pa-rameters of phase transition caused by the pre- sence of δ-meson field are investigated. Finally, alterations in the integral and structure para-meters of hybrid stars due to deconfinement phase transitions are discussed.
Cite this paper
Alaverdyan, G. (2010) Scalar-isovector δ-meson mean-field and mixed phase structure in compact stars. Natural Science, 2, 489-493. doi: 10.4236/ns.2010.25061.
 Serot, B.D. and Walecka, J.D. (1986) The relativistic nuclear many-body problem. In Adv. in Nuclear Physics, Eds., Negele, J.W and Vogt, E., 16(1), Plenum Press, New York.
Liu, B., Greco, V., Baran, V., Colonna, M. and Di Toro, M. (2002) Asymmetric nuclear matter: The role of the isovector scalar channel. Physical Reviews C, 65(4), 335-345.
Greco, V., Colonna, M., Toro, M.D. and Matera, F. (2003) Collective modes of asymmetric nuclear matter in quantum hadrodynamics. Physical Reviews C, 67(1), 015203.
Glendenning, N.K. (1992) First-order phase transitions with more than one conserved charge: Consequences for neutron stars. Physical Reviews D, 46(3), 1274-1287,
Heiselberg, H., Pethick, C.J. and Staubo, E.S. (1993)
Quark matter droplets in neutron stars. Physical Review Letters, 70(10), 1355-1359.
Heiselberg, H. and Hjorth-Jensen, M. (2000) Phases of dense matter in neutron stars. Physics Reports, 328(5-6), 237-327.
Alaverdyan, G.B. (2009) Relativistic mean-field theory equation of state of neutron star matter and a Maxwellian phase transition to strange quark matter. Astrophysics, 52(147), 132-150.
Glendenning, N.K. (2000) Compact stars, Springer, Cambridge.
Alaverdyan, G.B. (2009) Scalar-isovector δ meson in the relativistic mean field theory and the structure of neutron stars with a quark core. Gravitation & Cosmology, 15(1), 5-9.
Farhi, E. and Jaffe, R.L. (1984) Strange matter. Physical Reviews D, 30(2), 2379-2390.