corner
corner

Phys. Rev. D 76, 104048 (2007) [13 pages]

Spontaneous symmetry breaking in the bulk and the localization of fields on the brane

Download: PDF (170 kB) Buy this article Export: BibTeX or EndNote (RIS)

Orfeu Bertolami* and Carla Carvalho
Departamento de Física, Instituto Superior Técnico, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal

Received 13 June 2007; published 29 November 2007

We consider real and complex scalar fields nonminimally coupled to gravity in the bulk spacetime and study their impact on the brane upon acquiring a nonvanishing vacuum expectation value. When examining the case of the complex scalar field, a minimally coupled U(1) gauge field is also considered so that spontaneous symmetry breaking can take place. Particular attention is paid to the terms arising from the junction conditions, which act towards reinforcing the mechanism of spontaneous symmetry breaking. We find that the embedding of a braneworld universe in a bulk spacetime endowed with matter fields can induce this mechanism at very high energies and that matter localized on the brane will only interact with bulk matter fields through gravity when a nonminimal coupling exists.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.76.104048
DOI:
10.1103/PhysRevD.76.104048
PACS:
04.50.+h, 12.10.Dm

*orfeu@cosmos.ist.utl.pt

ccarvalho@ist.edu

Also at Centro de Física dos Plasmas, Instituto Superior Técnico, Avenida Rovisco Pais 1, 1049-001 Lisboa, Portugal.