Magnetic color flavor locking phase in high density QCD
Mar, 2005
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Abstract:
We investigate the effects of an external magnetic field in the gap structure of a color superconductor with three massless quark flavors. Using an effective theory with four-fermion interactions, inspired by one-gluon exchange, we show that the long-range component of the external magnetic field that penetrates the color-flavor locked (CFL) phase modifies its gap structure, producing a new phase of lower symmetry. A main outcome of our study is that the field tends to strengthen the gaps formed by -charged and -neutral quarks that coupled among themselves through tree-level vertices. These gaps are enhanced by the field-dependent density of states of the -charged quarks on the Fermi surface. Our considerations are relevant for the study of highly magnetized compact stars.- 24.85.+p
- 12.38.Aw
- quantum chromodynamics
- quark matter
- Fermi surface
- color flavor locked phase
- superconductivity: color
- superconductivity: gap
- flavor: 3
- magnetic field: external field
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