From NANOGrav to LIGO with metastable cosmic strings
Sep 22, 20204 pages
Published in:
- Phys.Lett.B 811 (2020) 135914
- Published: Dec 10, 2020
e-Print:
- 2009.10649 [astro-ph.CO]
DOI:
- 10.1016/j.physletb.2020.135914 (publication)
Report number:
- CERN-TH-2020-157,
- DESY 20-154,
- DESY-20-154
Experiments:
Citations per year
Abstract: (Elsevier)
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.Note:
- 5 pages, 2 figures. Minor bug in Fig. 1 fixed, results unchanged
- gravitational radiation: stochastic
- gravitational radiation: background
- magnetic monopole: mass
- cosmic string
- spontaneous symmetry breaking
- grand unified theory
- interferometer
- string tension
- leptogenesis
- dark matter
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Figures(2)
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