Nambu-Goldstone Modes in Gravitational Theories with Spontaneous Lorentz Breaking
arXiv:hep-th/0607127 · doi:10.1142/S021827180701122X
Abstract
Spontaneous breaking of Lorentz symmetry has been suggested as a possible mechanism that might occur in the context of a fundamental Planck-scale theory, such as string theory or a quantum theory of gravity. However, if Lorentz symmetry is spontaneously broken, two sets of questions immediately arise: what is the fate of the Nambu-Goldstone modes, and can a Higgs mechanism occur? A brief summary of some recent work looking at these questions is presented here.
arXiv comment6 pages. Presented at the meeting "From Quantum to Cosmos," Washington, D.C., May 2006; published in Int. J. Mod. Phys. D16:2357-2363, 2008
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- GUP Modified Hawking Radiation in Bumblebee Gravity
- Tests of Lorentz symmetry in the gravitational sector
- Lorentz Violation in Goldstone Gravity
- Hamiltonian formulation of an effective modified gravity with nondynamical background fields
- Macroscopic theory of dark sector
- Linearized Lorentz-Violating Gravity and Discriminant Locus in the Moduli Space of Mass Terms