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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., BRUNETTI, M., COCCIA, E. (eugenio), FUCITO, F., LOBO GUTIÉRREZ, José alberto. Cross section of a resonant-mass detector for scalar gravitational waves. _Physical Review D_. 1998. Vol. 57, núm. 8, pàgs. 4525-4534. [consulta: 23 de gener de 2026]. ISSN: 0556-2821. [Disponible a: https://hdl.handle.net/2445/12315]

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