Secondary graviton spectra and waterfall-like fields

Details Secondary graviton spectra and waterfall-like fields Secondary graviton spectra and waterfall-like fields

2010-08-06

arxiv.org/abs/1008.1164v1

Phys.Rev.D82:083523,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

21 pages, 5 figures

Scientific paper

10.1103/PhysRevD.82.083523

The secondary spectra of the gravitons induced by a waterfall-like field are computed and the general bounds on the spectral energy density of the tensor modes of the geometry are translated into explicit constraints on the amplitude and slope of the waterfall spectrum. The obtained results are compared with the primary gravitational wave spectra of the concordance model and of its neighboring extensions as well as with the direct Ligo/Virgo bounds on stochastic backgrounds of relic gravitons. Space-borne interferometers (such as Lisa, Bbo, Decigo) seem to be less relevant but their potential implications are briefly outlined.

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