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Title: Very light cosmological scalar fields from a tiny cosmological constant

Abstract

I discuss a mechanism which generates a mass term for a scalar field in an expanding universe. The mass of this field turns out to be generated by the cosmological constant and can be naturally small if protected by a conformal symmetry which is, however, broken in the gravitational sector. The mass is comparable today to the Hubble time. This scalar field could thus impact our Universe today and, for example, be at the origin of a time variation of the couplings and masses of the parameters of the standard model.

Authors:
 [1]
  1. Universite Libre de Bruxelles, Service de Physique Theorique, CP225, Boulevard du Triomphe (Campus plaine), B-1050 Brussels (Belgium)
Publication Date:
OSTI Identifier:
21032425
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 76; Journal Issue: 8; Other Information: DOI: 10.1103/PhysRevD.76.083502; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CONFORMAL INVARIANCE; COSMOLOGICAL CONSTANT; INFLATIONARY UNIVERSE; REST MASS; SCALAR FIELDS; STANDARD MODEL; UNIVERSE

Citation Formats

Calmet, Xavier. Very light cosmological scalar fields from a tiny cosmological constant. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.76.083502.
Calmet, Xavier. Very light cosmological scalar fields from a tiny cosmological constant. United States. doi:10.1103/PHYSREVD.76.083502.
Calmet, Xavier. Mon . "Very light cosmological scalar fields from a tiny cosmological constant". United States. doi:10.1103/PHYSREVD.76.083502.
@article{osti_21032425,
title = {Very light cosmological scalar fields from a tiny cosmological constant},
author = {Calmet, Xavier},
abstractNote = {I discuss a mechanism which generates a mass term for a scalar field in an expanding universe. The mass of this field turns out to be generated by the cosmological constant and can be naturally small if protected by a conformal symmetry which is, however, broken in the gravitational sector. The mass is comparable today to the Hubble time. This scalar field could thus impact our Universe today and, for example, be at the origin of a time variation of the couplings and masses of the parameters of the standard model.},
doi = {10.1103/PHYSREVD.76.083502},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 8,
volume = 76,
place = {United States},
year = {2007},
month = {10}
}