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Evolution of the fine-structure constant in runaway dilaton models

Martins, C.J.A.P., Vielzeuf, P.E., Martinelli, M., Calabrese, Erminia and Pandolfi, S. 2015. Evolution of the fine-structure constant in runaway dilaton models. Physics Letters B 743 , pp. 377-382. 10.1016/j.physletb.2015.03.002

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Abstract

We study the detailed evolution of the fine-structure constant α in the string-inspired runaway dilaton class of models of Damour, Piazza and Veneziano. We provide constraints on this scenario using the most recent α measurements and discuss ways to distinguish it from alternative models for varying α. For model parameters which saturate bounds from current observations, the redshift drift signal can differ considerably from that of the canonical ΛCDM paradigm at high redshifts. Measurements of this signal by the forthcoming European Extremely Large Telescope (E-ELT), together with more sensitive α measurements, will thus dramatically constrain these scenarios.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Elsevier
ISSN: 03702693
Date of First Compliant Deposit: 7 September 2017
Date of Acceptance: 4 March 2015
Last Modified: 07 Sep 2017 09:24
URI: http://orca.cf.ac.uk/id/eprint/104420

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