Probing WIMP dark matter via gravitational waves' spectral shapes

0567286 - FZÚ 2023 RIV US eng J - Journal Article
Borah, D. - Das, S.J. - Saha, A.K. - Samanta, Rome
Probing WIMP dark matter via gravitational waves' spectral shapes.
Physical Review D. Roč. 106, č. 1 (2022), č. článku L011701. ISSN 2470-0010. E-ISSN 2470-0029
R&D Projects: GA MŠMT(CZ) EF20_079/0017754
Grant - others:OP VVV - MSCA-IF IV FZU(XE) CZ.02.2.69/0.0/0.0/20_079/0017754
Institutional support: RVO:68378271
Keywords : neutrino mass * WIMP dark matter * baryon asymmetry
OECD category: Particles and field physics
Impact factor: 5, year: 2022
Method of publishing: Open access

We propose a novel probe of weakly interacting massive particle (WIMP) dark matter (DM) candidates of a wide mass range which fall short of the required annihilation rates to satisfy correct thermal relic abundance, dubbed as miracle-less WIMP. If the DM interactions are mediated by an Abelian gauge boson like B-L, its annihilation rates typically remain smaller than the WIMP ballpark for very high scale B-L symmetry breaking, leading to overproduction. The thermally overproduced relic is brought within observed limits via late entropy dilution from one of the three right-handed neutrinos (RHN) present for keeping the model anomaly free and generating light neutrino masses. Such late entropy injection leads to peculiar spectral shapes of gravitational waves (GWs) generated by cosmic strings, formed as a result of B-L symmetry breaking.
Permanent Link: https://hdl.handle.net/11104/0338553