http://arxiv.org/abs/1910.08213
We assume that cosmological dark matter is composed of massive neutral scalar particles that decay into two massless particles. The decay produces a stochastic background of gravitational waves because of the “memory effect”. We calculate the spectrum of this background and discuss its potential observability. Penrose has proposed a cosmological model for which these particles have the Planck mass and decay into two gravitons [arXiv:1707.04169]. For these, the spectrum has an additional “direct” contribution from the decay products, which we also estimate and discuss.
B. Allen
Mon, 21 Oct 19
54/54
Comments: 4 pages, 1 figure
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