{gamma}-ray bursts and the QCD phase diagram

Journal Article · Wed Feb 15 04:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.025806· OSTI ID:20771304

Menezes, D P ^[1]; Melrose, D B ^[2]; Providencia, C ^[3]; Wu, K ^[4]

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1. Departamento de Fisica, CFM, Universidade Federal de Santa Catarina, Florianopolis-SC, C.P. 476, CEP 88.040-900 (Brazil)
2. School of Physics, University of Sydney, NSW 2006 (Australia)
3. Centro de Fisica Teorica, Departamento de Fisica, Universidade de Coimbra, P-3004-516 Coimbra (Portugal)
4. Mullard Space Science Laboratory, University College London, Holmbury St Mary, Surrey, RH5 6NT (United Kingdom)

The quantum chromodynamics phase diagram shows the phase transitions that can take place in matter at different temperatures and densities. In this work we discuss the possibility that {gamma}-ray bursts might result from a phase change in the interior of a neutron star and calculate the energy released in the conversion of a metastable star into a stable star. We consider several different initial and several different final configurations. Initial metastable stars are taken as hadronic, hybrid, and quark stars with unpaired quarks; possible stable stars are hybrid and quark stars, taken both with unpaired and paired phases to study the deconfinement phase transition and normal quark matter-superconducting quark matter phase transition within a large number of relativistic models used to describe compact stars. The models used for the hadron matter are the nonlinear Walecka model and the quark-meson coupling model with and without hyperons. For the quark matter we have used the MIT bag model, the bag model with paired quarks to which we refer as the color-flavor-locked phase model, and the Nambu-Jona-Lasinio model. Within this mechanism we obtain energies of the order of 10{sup 50}-10{sup 53} erg, accounting for both long and short {gamma}-ray bursts.

• OSTI ID: 20771304
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BAG MODEL
COLOR MODEL
COSMIC GAMMA BURSTS
COUPLING
DENSITY
FLAVOR MODEL
HYPERONS
MESONS
NEUTRON STARS
NONLINEAR PROBLEMS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
QUANTUM CHROMODYNAMICS
QUARK MATTER
QUARKS
RELATIVISTIC RANGE
WALECKA MODEL