Spontaneous symmetry breaking in cosmos: The hybrid symmetron as a dark energy switching device

Bamba, Kazuharu; Gannouji, Radouane; Kamijo, M.; Nojiri, Shin’ichi; Sami, M

Keywords: cosmology of theories beyond the sm, modified gravity, dark energy theory

Abstract

We consider symmetron model in a generalized background with a hope to make it compatible with dark energy. We observe a ``no go'' theorem at least in case of a conformal coupling. Being convinced of symmetron incapability to be dark energy, we try to retain its role for spontaneous symmetry breaking and assign the role of dark energy either to standard quintessence or F(R) theory which are switched on by symmetron field in the symmetry broken phase. The scenario reduces to standard Einstein gravity in the high density region. After the phase transition generated by symmetron field, either the F(R) gravity or the standard quintessence are induced in the low density region. we demonstrate that local gravity constraints and other requirements are satisfied although the model could generate the late-time acceleration of Universe.

Más información

Título de la Revista: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volumen: 2013
Número: 017
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2013
Página de inicio: 017
Página final: 017
URL: http://stacks.iop.org/1475-7516/2013/i=07/a=017?key=crossref.ab1d02a364076e51fda3af23bc6b3eb1
DOI:

10.1088/1475-7516/2013/07/017