Evolution of the fine-structure constant in runaway dilaton models

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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Main Authors: C.J.A.P. Martins, P.E. Vielzeuf, M. Martinelli, E. Calabrese, S. Pandolfi
Format: Article
Language:English
Published: Elsevier 2015-04-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269315001653
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spelling 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
work_keys_str_mv AT cjapmartins evolutionofthefinestructureconstantinrunawaydilatonmodels
AT pevielzeuf evolutionofthefinestructureconstantinrunawaydilatonmodels
AT mmartinelli evolutionofthefinestructureconstantinrunawaydilatonmodels
AT ecalabrese evolutionofthefinestructureconstantinrunawaydilatonmodels
AT spandolfi evolutionofthefinestructureconstantinrunawaydilatonmodels
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