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Evolution of the fine-structure constant in runaway dilaton models

M. Martinelli, E. Calabrese, C. J. A. P. Martins


We use a combination of simulated cosmological probes as expected from the forthcoming European Extremely Large Telescope (E-ELT), to constrain the class of string-inspired runaway dilaton models of Damour, Piazza and Veneziano. We improve previously existing analyses investigating in detail the degeneracies between the parameters ruling the coupling of the dilaton field to the other components of the universe, and we consider three different scenarios for the dark sector couplings. We show the constraining power of the E-ELT and highlight how degeneracies will affect this in different fiducial cosmologies.

Fine-structure constant; future experiments; cosmology; dilaton

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The Fourteenth Marcel Grossmann Meeting
On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories

Robert T Jantzen Massimo Bianchi

University of Rome “La Sapienza”, Page 3664
2017 December

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia