Varying fundamental constants and dark energy in the ESPRESSO era
Abstract
The observational evidence for the recent acceleration of the universe shows that canonical theories of cosmology and particle physics are incomplete and that new physics is out there, waiting to be discovered. A compelling task for astrophysical facilities is to search for, identify and ultimately characterize this new physics. I present very recent developments in tests of the stability of nature's fundamental constants, as well as their impact on physics paradigms beyond the standard model. Specifically I discuss new observational constraints at low redshifts and at the BBN epoch, and highlight their different implications for canonical quintessence-type models and for non-canonical string-theory inspired models. Finally I also present new forecasts, based on realistic simulated data, of the gains in sensitivity for these constraints expected from ELT-HIRES, on its own and in combination with Euclid.
Keywords
Cite
@article{arxiv.2111.04137,
title = {Varying fundamental constants and dark energy in the ESPRESSO era},
author = {C. J. A. P. Martins},
journal= {arXiv preprint arXiv:2111.04137},
year = {2021}
}
Comments
Summary of a talk given at the Variation of the Fundamental Constants, Tests of the Fundamental Symmetries and Probes of the Dark Sector parallel session of the Sixteenth Marcel Grossmann Meeting. To appear in the proceedings