Gravitational shine of dark domain walls

0567201 - FZÚ 2023 RIV GB eng J - Journal Article
Babichev, E. - Gorbunov, D. - Ramazanov, Sabir - Vikman, Alexander
Gravitational shine of dark domain walls.
Journal of Cosmology and Astroparticle Physics. Roč. 2022, č. 4 (2022), č. článku 028. ISSN 1475-7516. E-ISSN 1475-7516
R&D Projects: GA MŠMT EF15_003/0000437; GA ČR(CZ) GJ20-16531Y
Grant - others:OP VVV - CoGraDS(XE) CZ.02.1.01/0.0/0.0/15_003/0000437
Institutional support: RVO:68378271
Keywords : cosmic strings * domain walls * monopoles * dark matter theory
OECD category: Particles and field physics
Impact factor: 6.3, year: 2022
Method of publishing: Limited access
https://doi.org/10.1088/1475-7516/2022/04/028

Cosmic domain walls are harmless, provided that their tension decreases with expansion of the Universe. This setup can be realized, if the scale of spontaneous symmetry breaking is induced dynamically through the interaction with hot primordial plasma. In that case, the domain wall tension can attain large values in the early Universe without any conflict with observations. Owing to the large initial tension, these topological defects may serve as a powerful source of gravitational waves. We make a preliminary estimate of the gravitational wave spectrum and argue that it is distinct from the spectrum produced by other sources, in particular by domain walls of a constant tension. The resulting gravitational wave signal is in the range accessible by Einstein Telescope, DECIGO, TianQin, LISA, IPTA, or SKA, if the field constituting the domain walls is very feebly coupled with hot primordial plasma and has tiny self-interactions.
Permanent Link: https://hdl.handle.net/11104/0338491