Nambu-Goldstone Modes in Gravitational Theories with Spontaneous Lorentz Breaking

Details Nambu-Goldstone Modes in Gravitational Theories with Spontaneous Lorentz Breaking Nambu-Goldstone Modes in Gravitational Theories with Spontaneous Lorentz Breaking

2006-07-19

arxiv.org/abs/hep-th/0607127v2

Int.J.Mod.Phys.D16:2357-2363,2008

Physics

High Energy Physics

High Energy Physics - Theory

6 pages. Presented at the meeting "From Quantum to Cosmos," Washington, D.C., May 2006; published in Int. J. Mod. Phys. D16:23

Scientific paper

10.1142/S021827180701122X

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.

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