Scalar field mass in generalized gravity

Details Scalar field mass in generalized gravity Scalar field mass in generalized gravity

2009-06-10

arxiv.org/abs/0906.1901v2

Class.Quant.Grav.26:145014,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, no figures, to appear in Class. Quantum Grav. References added

Scientific paper

10.1088/0264-9381/26/14/145014

The notions of mass and range of a Brans-Dicke-like scalar field in scalar-tensor and f(R) gravity are subject to an ambiguity that hides a potential trap. We spell out this ambiguity and identify a physically meaningful and practical definition for these quantities. This is relevant when giving a mass to this scalar in order to circumvent experimental limits on the PPN parameters coming from Solar System experiments.

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