From NANOGrav to LIGO with metastable cosmic strings. (arXiv:2009.10649v2 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Buchmuller_W/0/1/0/all/0/1">Wilfried Buchmuller</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Domcke_V/0/1/0/all/0/1">Valerie Domcke</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schmitz_K/0/1/0/all/0/1">Kai Schmitz</a>
We interpret the recent NANOGrav results in terms of a stochastic
gravitational wave background from metastable cosmic strings. The observed
amplitude of a stochastic signal can be translated into a range for the cosmic
string tension and the mass of magnetic monopoles arising in theories of grand
unification. In a sizable part of the parameter space, this interpretation
predicts a large stochastic gravitational wave signal in the frequency band of
ground-based interferometers, which can be probed in the very near future. We
confront these results with predictions from successful inflation, leptogenesis
and dark matter from the spontaneous breaking of a gauged B-L symmetry.
We interpret the recent NANOGrav results in terms of a stochastic
gravitational wave background from metastable cosmic strings. The observed
amplitude of a stochastic signal can be translated into a range for the cosmic
string tension and the mass of magnetic monopoles arising in theories of grand
unification. In a sizable part of the parameter space, this interpretation
predicts a large stochastic gravitational wave signal in the frequency band of
ground-based interferometers, which can be probed in the very near future. We
confront these results with predictions from successful inflation, leptogenesis
and dark matter from the spontaneous breaking of a gauged B-L symmetry.
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