Journal
PHYSICS LETTERS B
Volume 811, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2020.135914
Keywords
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Funding
- European's Union [796961]
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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. (C) 2020 The Authors. Published by Elsevier B.V.
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