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Transverse gravity versus observations

AuthorsÁlvarez-Vázquez, Enrique ; Fernández Faedo, Antón; López-Villarejo, J. J.
Modified gravity
Issue DateJul-2009
PublisherInstitute of Physics Publishing
CitationJournal of Cosmology and Astropartcile Physics 07(002): (2009)
AbstractTheories of gravity invariant under those diffeomorphisms generated by transverse vectors, ∂μξμ = 0 are considered. Such theories are dubbed transverse, and differ from General Relativity in that the determinant of the metric, g, is a transverse scalar. We comment on diverse ways in which these models can be constrained using a variety of observations. Generically, an additional scalar degree of freedom mediates the interaction, so the usual constraints on scalar-tensor theories have to be imposed. If the purely gravitational part is Einstein-Hilbert but the matter action is transverse, the models predict that the three a priori different concepts of mass (gravitational active and gravitational passive as well as inertial) are not equivalent anymore. These transverse deviations from General Relativity are therefore tightly constrained, actually correlated with existing bounds on violations of the equivalence principle, local violations of Newton's third law and/or violation of Local Position Invariance.
Description21 pages.-- Pre-print archive.
Publisher version (URL)http://dx.doi.org/10.1088/1475-7516/2009/07/002
ISSN1475-7516 (Online)
Appears in Collections:(IFT) Artículos
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