Phys. Rev. D 65, 067101 (2002) [4 pages]Sensitivity of spherical gravitational-wave detectors to a stochastic background of nonrelativistic scalar radiationReceived 31 July 2001; published 28 February 2002 We analyze the signal-to-noise ratio for a relic background of scalar gravitational radiation composed of massive, nonrelativistic 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 (a) the absence of the signal suppression, for nonrelativistic scalars, with respect to a background of massless particles, and (b) for flat enough spectra, a growth of the signal with the observation time faster than for a massless stochastic background. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.067101
DOI:
10.1103/PhysRevD.65.067101
PACS:
04.80.Nn, 04.30.-w, 98.70.Vc
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