Unifying cosmological and recent time variations of fundamental couplings

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dc.creatorDent, Thomas
dc.creatorStern, Steffen
dc.creatorWetterich, Christof
dc.date2008-08-05
dc.date2008-11-25
dc.date.accessioned2026-07-07T12:44:44Z
dc.date.available2026-07-07T12:44:44Z
dc.descriptionA number of positive and null results on the time variation of fundamental constants have been reported. It is difficult to judge whether or not these claims are mutually consistent, since the observable quantities depend on several parameters, namely the coupling strengths and masses of particles. The evolution of these coupling-parameters over cosmological history is also a priori unknown. A direct comparison requires a relation between the couplings. We explore several distinct scenarios based on unification of gauge couplings, providing a representative (though not exhaustive) sample of such relations. For each scenario we obtain a characteristic time dependence and discuss whether a monotonic time evolution is allowed. For all scenarios, some contradictions between different observations appear. We show how a clear observational determination of non-zero variations would test the dominant mechanism of varying couplings within unified theories.
dc.descriptionFormatting changes and minor typos, equivalent to published version. 35 pages (11pt article format), 8 figures
dc.identifierhttps://arxiv.org/abs/0808.0702
dc.identifierhttp://arxiv.org/abs/0808.0702
dc.identifierPhys.Rev.D78:103518,2008
dc.identifierdoi:10.1103/PhysRevD.78.103518
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220872
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleUnifying cosmological and recent time variations of fundamental couplings
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