Scalar field mass in generalized gravity
arXiv:0906.1901 · doi:10.1088/0264-9381/26/14/145014
Abstract
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.
11 pages, no figures, to appear in Class. Quantum Grav. References added