arXiv:hep-th/0503146·v1·High Energy Physics — Theory
A Quantum Gravitational Relaxation of The Cosmological Constant
Abstract
Similar to QCD, general relativity has a sector due to large diffeomorphisms. We make explicit, for the first time, that the gravitational CP violating parameter is non-perturbatively related to the cosmological constant. A gravitational pseudoscalar coupling to massive fermions gives rise to general relativity from a topological theory through a chiral symmetry breaking mechanism. We show that a gravitational Peccei-Quinn like mechanism can dynamically relax the cosmological constant.
Comments: 6 pages