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Título

Transverse gravity versus observations

AutorÁlvarez-Vázquez, Enrique ; Fernández Faedo, Antón; López-Villarejo, J. J.
Palabras claveGravity
Modified gravity
Fecha de publicaciónjul-2009
EditorInstitute of Physics Publishing
CitaciónJournal of Cosmology and Astropartcile Physics 07(002): (2009)
ResumenTheories 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.
Descripción21 pages.-- Pre-print archive.
Versión del editorhttp://dx.doi.org/10.1088/1475-7516/2009/07/002
URIhttp://hdl.handle.net/10261/20279
DOI10.1088/1475-7516/2009/07/002
ISSN1475-7516 (Online)
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