Photons and gravitons as Goldstone bosons, and the cosmological constant
Mar, 200221 pages
Published in:
- Phys.Rev.D 66 (2002) 045015
e-Print:
- hep-th/0203221 [hep-th]
Report number:
- UCLA-02-TEP-3
View in:
Citations per year
Abstract:
We reexamine a scenario in which photons and gravitons arise as Goldstone bosons associated with the spontaneous breaking of Lorentz invariance. We study the emergence of Lorentz invariant low energy physics in an effective field theory framework, with non-Lorentz invariant effects arising from radiative corrections and higher order interactions. Spontaneous breaking of the Lorentz group also leads to additional exotic but weakly coupled Goldstone bosons, whose dispersion relations we compute. The usual cosmological constant problem is absent in this context: being a Goldstone boson, the graviton can never develop a potential, and the existence of a flat spacetime solution to the field equations is guaranteed.- 11.15.Ex
- 11.10.Ef
- photon: Goldstone particle
- graviton: Goldstone particle
- violation: Lorentz
- spontaneous symmetry breaking
- cosmological constant
- dispersion relation
- effective action
- matter: coupling
References(13)
Figures(0)