Nambu-Goldstone Modes in Gravitational Theories with Spontaneous Lorentz Breaking
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 (NG) modes, and can a Higgs mechanism occur? A brief summary of some recent work looking at these questions is presented here.
- Publication:
-
International Journal of Modern Physics D
- Pub Date:
- 2007
- DOI:
- 10.1142/S021827180701122X
- arXiv:
- arXiv:hep-th/0607127
- Bibcode:
- 2007IJMPD..16.2357B
- Keywords:
-
- Lorentz symmetry;
- Higgs mechanism;
- gravity;
- High Energy Physics - Theory;
- General Relativity and Quantum Cosmology
- E-Print:
- 6 pages. Presented at the meeting "From Quantum to Cosmos," Washington, D.C., May 2006