Sensitivity of spherical gravitational-wave detectors to a stochastic background of non-relativistic scalar radiation

Details Sensitivity of spherical gravitational-wave detectors to a stochastic background of non-relativistic scalar radiation Sensitivity of spherical gravitational-wave detectors to a stochastic background of non-relativistic scalar radiation

2001-07-31

arxiv.org/abs/gr-qc/0107103v1

Phys.Rev. D65 (2002) 067101

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

four pages, latex

Scientific paper

10.1103/PhysRevD.65.067101

We analyze the signal-to-noise ratio for a relic background of scalar gravitational radiation composed of massive, non-relativistic particles, interacting with the monopole mode of two resonant spherical detectors. We find that the possible signal is enhanced with respect to the differential mode of the interferometric detectors. This enhancement is due to: {\rm (a)} the absence of the signal suppression, for non-relativistic scalars, with respect to a background of massless particles, and {\rm (b)} for flat enough spectra, a growth of the signal with the observation time faster than for a massless stochastic background.

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