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Cross section of a resonant-mass detector for scalar gravitational waves
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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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BIANCHI, M., et al. Cross section of a resonant-mass detector for scalar gravitational waves. Physical Review D. 1998. Vol. 57, num. 8, pags. 4525-4534. ISSN 0556-2821. [consulted: 19 of August of 2026]. Available at: https://hdl.handle.net/2445/12315