Cosmological acceleration, varying couplings, and Lorentz breaking

• Type: Another Publication in an International Scientific Journal
• Date: 2004

Authors

Bertolami, O (Author) Other; Lehnert, R (Author) Other; Potting, R (Author) Other; Ribeiro, A (Author) Other

Journal

Title: Physical Review D: Particles and fields

Vol. 69

Final page: 11

ISSN: 0556-2821

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 119 Citations

Scopus - 135 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-ATD

DOI: 10.1103/physrevd.69.083513

Abstract (EN): Many candidate fundamental theories contain scalar fields that can acquire spacetime-varying expectation values in a cosmological context. Such scalars typically obey Lorentz-violating effective dispersion relations. We illustrate this fact within a simple supergravity model that also exhibits the observed late-time cosmological acceleration and implies varying electromagnetic couplings.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11