On the response of gravitational antennas to dilatonic waves
arXiv:gr-qc/9910019 · doi:10.1016/S0370-2693(99)01309-X
Abstract
It is pointed out that the coupling of macroscopic test masses to the gravi-dilaton background of string theory is non geodesic, in general, and cannot be parametrized by a Brans-Dicke model of scalar-tensor gravity. The response of gravitational antennas to dilatonic waves should be analyzed through a generalized equation of geodesic deviation, taking into account the possible direct coupling of the background to the (composition-dependent) dilatonic charge of the antenna.
10 pages, Latex, no figures