Cross Section of a Resonant-Mass Detector for Scalar Gravitational Waves

Details Cross Section of a Resonant-Mass Detector for Scalar Gravitational Waves Cross Section of a Resonant-Mass Detector for Scalar Gravitational Waves

1997-09-18

arxiv.org/abs/gr-qc/9709045v1

Phys.Rev.D57:4525-4534,1998

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

25 pages, latex file

Scientific paper

10.1103/PhysRevD.57.4525

Gravitationally coupled scalar fields, originally introduced by Jordan, Brans and Dicke to account for a non constant gravitational coupling, are a prediction of many non-Einsteinian theories of gravity not excluding perturbative formulations of String Theory. In this paper, we compute the cross sections for scattering and absorption of scalar and tensor gravitational waves by a resonant-mass detector in the framework of the Jordan-Brans-Dicke theory. The results are then specialized to the case of a detector of spherical shape and shown to reproduce those obtained in General Relativity in a certain limit. Eventually we discuss the potential detectability of scalar waves emitted in a spherically symmetric gravitational collapse.

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