Global Defects In Theories With Lorentz Symmetry Violation
arXiv:hep-ph/0409285 · doi:10.1103/PhysRevD.71.047701
Abstract
We study global topological defects in the Jacobson-Corley model which breaks Lorentz symmetry and involves up to fourth order derivatives. There is a window in the parameter space in which no solution exists. Otherwise, different profiles are allowed for the same values of the parameters. For a scale of Lorentz violation much higher than the scale of gauge symmetry breaking, the energy densities are higher, of the same order or smaller than in the usual case for domain walls, cosmic strings and hedgehogs respectively. Possible cosmological implications are suggested.
11 pages latex, misprints corrected, version to appear in PRD
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