APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Ivan Arraut (Tokyo University of Science / CAS)
Title: The Higgs mechanism at the graviton level: The Vainshtein mechanism in time domains
Date (JST): Tue, Aug 11, 2015, 13:30 - 14:30
Place: Seminar Room B
Abstract: I analyze the Higgs mechanism at the graviton level inside the non-linear theory of massive gravity. In the standard formulation, the graviton mass appears as a parameter multiplying the whole massive action and it cannot appear dynamically. Then the theory contains three free parameters, namely, two inside the potential and the graviton mass. The spherically symmetric solutions of the theory revealed the existence of vacuum degeneracy. It appears due to the preferred time direction when the Stuckelberg function is non-trivial. Then any generator related to the time coordinate is potentially broken at the vacuum level, remaining then the spherical symmetry. For the gauge symmetries involved, I formulate the Higgs mechanism at the graviton level as a consequence of the Vainshtein mechanism but formulated in time domains by working in a "free falling" frame of reference.