Hardon-Quark Hybrid Stars Constructed by the Nonlinear σ-ω-ρ Mean-Field Model and MIT-Bag Model - Open Access Library Journal

OALibJ > Vol.2 No.11, November 2015

Open Access Library Journal

Volume 2, Issue 11 (November 2015)

ISSN Print: 2333-9705 ISSN Online: 2333-9721

Google-based Impact Factor: 0.73 Citations

Hardon-Quark Hybrid Stars Constructed by the Nonlinear σ-ω-ρ Mean-Field Model and MIT-Bag Model ()

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DOI: 10.4236/oalib.1102012 610 Downloads 1,166 Views Citations

Author(s)

Schun T. Uechi¹, Hiroshi Uechi²

Affiliation(s)

¹Department of Physics & Astronomy, The University of Georgia, Athens, GA, USA.
²Osaka Gakuin University, Suita, Osaka, Japan.

ABSTRACT

Density-dependent relations among saturation properties of symmetric nuclear matter and hyperonic matter, properties of hadron-(strange) quark hybrid stars are discussed by applying the conserving nonlinear s-w-r hadronic mean-field theory. Nonlinear interactions that will be renormalized as effective coupling constants, effective masses and sources of meson equations of motion are constructed self-consistently by maintaining thermodynamic consistency to the mean-field approximation. The coupling constants expected from the hadronic mean-field model and SU (6) quark model for the vector coupling constants are compared; the coupling constants exhibit different density-dependent results for effective masses and binding energies of hyperons, properties of hadron and hadron-quark stars. The nonlinear s-w-r hadronic mean-field approximation with or without vacuum fluctuation corrections and strange quark matter defined by MIT-bag model are employed to examine properties of hadron-(strange) quark hybrid stars. The hadron-(strange) quark hybrid stars become more stable at high densities compared to pure hadronic and pure strange quark stars.

KEYWORDS

Nonlinear σ-ω-ρ Mean-Field, Hyperon Onset Densities, Hyperon Coupling Ratios, Hadron-Quark Hybrid Stars

Share and Cite:

Uechi, S. and Uechi, H. (2015) Hardon-Quark Hybrid Stars Constructed by the Nonlinear σ-ω-ρ Mean-Field Model and MIT-Bag Model. Open Access Library Journal, 2, 1-16. doi: 10.4236/oalib.1102012.

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