dorsal/arxiv
View SchemaMagnetic Phases in Three-Flavor Color Superconductivity
| Authors | Efrain J. Ferrer, Vivian de la Incera |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0703034 |
| URL | https://arxiv.org/abs/nucl-th/0703034 |
| DOI | 10.1103/PhysRevD.76.045011 |
| Journal | Phys.Rev.D76:045011,2007 |
Abstract
The best natural candidates for the realization of color superconductivity are quark stars -not yet confirmed by observation- and the extremely dense cores of compact stars, many of which have very large magnetic fields. To reliably predict astrophysical signatures of color superconductivity, a better understanding of the role of the star's magnetic field in the color superconducting phase that realizes in the core is required. This paper is an initial step in that direction. The field scales at which the different magnetic phases of a color superconductor with three quark flavors can be realized are investigated. Coming from weak to strong fields, the system undergoes first a symmetry transmutation from a Color-Flavor-Locked (CFL) phase to a Magnetic-CFL (MCFL) phase, and then a phase transition from the MCFL phase to the Paramagnetic-CFL (PCFL) phase. The low-energy effective theory for the excitations of the diquark condensate in the presence of a magnetic field is derived using a covariant representation that takes into account all the Lorentz structures contributing at low energy. The field-induced masses of the charged mesons and the threshold field at which the CFL $\to$ MCFL symmetry transmutation occurs are obtained in the framework of this low-energy effective theory. The relevance of the different magnetic phases for the physics of compact stars is discussed.
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"abstract": "The best natural candidates for the realization of color superconductivity\nare quark stars -not yet confirmed by observation- and the extremely dense\ncores of compact stars, many of which have very large magnetic fields. To\nreliably predict astrophysical signatures of color superconductivity, a better\nunderstanding of the role of the star\u0027s magnetic field in the color\nsuperconducting phase that realizes in the core is required. This paper is an\ninitial step in that direction. The field scales at which the different\nmagnetic phases of a color superconductor with three quark flavors can be\nrealized are investigated. Coming from weak to strong fields, the system\nundergoes first a symmetry transmutation from a Color-Flavor-Locked (CFL) phase\nto a Magnetic-CFL (MCFL) phase, and then a phase transition from the MCFL phase\nto the Paramagnetic-CFL (PCFL) phase. The low-energy effective theory for the\nexcitations of the diquark condensate in the presence of a magnetic field is\nderived using a covariant representation that takes into account all the\nLorentz structures contributing at low energy. The field-induced masses of the\ncharged mesons and the threshold field at which the CFL $\\to$ MCFL symmetry\ntransmutation occurs are obtained in the framework of this low-energy effective\ntheory. The relevance of the different magnetic phases for the physics of\ncompact stars is discussed.",
"arxiv_id": "nucl-th/0703034",
"authors": [
"Efrain J. Ferrer",
"Vivian de la Incera"
],
"categories": [
"nucl-th",
"astro-ph",
"hep-ph"
],
"doi": "10.1103/PhysRevD.76.045011",
"journal_ref": "Phys.Rev.D76:045011,2007",
"title": "Magnetic Phases in Three-Flavor Color Superconductivity",
"url": "https://arxiv.org/abs/nucl-th/0703034"
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