PPN Parameter $\gamma$ and Solar System Constraints of Massive Brans-Dicke Theories

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Perivolaropoulos, L.
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Abstract
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Previous solar system constraints of the Brans-Dicke (BD) parameter $\omega$ have either ignored the effects of the scalar field potential (mass terms) or assumed a highly massive scalar field. Here, we interpolate between the above two assumptions and derive the solar system constraints on the BD parameter $\omega$ for {\it any} field mass. We show that for $\omega=O(1)$ the solar system constraints relax for a field mass $m \gsim 20 \times m_{AU}= 20\times 10^{-27}GeV$.
Comment: 4 pages (revtex), 1 figure. Improved Figure 1, improved presentation. Accepted for publication in Phys. Rev. D
Keywords
General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, High Energy Physics - Theory
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