Evolution of the fine-structure constant in runaway dilaton models
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...
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doaj-10931e99a2ac4ad491582e09d88be4c52020-11-25T02:49:56ZengElsevierPhysics Letters B0370-26932015-04-01743377382Evolution of the fine-structure constant in runaway dilaton modelsC.J.A.P. Martins0P.E. Vielzeuf1M. Martinelli2E. Calabrese3S. Pandolfi4Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal; Instituto de Astrofísica e Ciências do Espaço, CAUP, Rua das Estrelas, 4150-762 Porto, Portugal; Corresponding author at: Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal.Institut de Física d'Altes Energies, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Barcelona), SpainInstitute for Theoretical Physics, University of Heidelberg, Philosophenweg 16, 69120, Heidelberg, GermanySub-department of Astrophysics, University of Oxford, Keble Road, Oxford OX1 3RH, UKDark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen, DenmarkWe 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. Keywords: Cosmology, Dynamical dark energy, Fine-structure constant, Astrophysical observationshttp://www.sciencedirect.com/science/article/pii/S0370269315001653 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
C.J.A.P. Martins P.E. Vielzeuf M. Martinelli E. Calabrese S. Pandolfi |
spellingShingle |
C.J.A.P. Martins P.E. Vielzeuf M. Martinelli E. Calabrese S. Pandolfi Evolution of the fine-structure constant in runaway dilaton models Physics Letters B |
author_facet |
C.J.A.P. Martins P.E. Vielzeuf M. Martinelli E. Calabrese S. Pandolfi |
author_sort |
C.J.A.P. Martins |
title |
Evolution of the fine-structure constant in runaway dilaton models |
title_short |
Evolution of the fine-structure constant in runaway dilaton models |
title_full |
Evolution of the fine-structure constant in runaway dilaton models |
title_fullStr |
Evolution of the fine-structure constant in runaway dilaton models |
title_full_unstemmed |
Evolution of the fine-structure constant in runaway dilaton models |
title_sort |
evolution of the fine-structure constant in runaway dilaton models |
publisher |
Elsevier |
series |
Physics Letters B |
issn |
0370-2693 |
publishDate |
2015-04-01 |
description |
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. Keywords: Cosmology, Dynamical dark energy, Fine-structure constant, Astrophysical observations |
url |
http://www.sciencedirect.com/science/article/pii/S0370269315001653 |
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