Beyond freeze-in: Dark matter via inverse phase transition and gravitational wave signal

0567316 - FZÚ 2023 RIV US eng J - Článek v odborném periodiku
Ramazanov, Sabir - Babichev, E. - Gorbunov, D. - Vikman, Alexander
Beyond freeze-in: Dark matter via inverse phase transition and gravitational wave signal.
Physical Review D. Roč. 105, č. 6 (2022), č. článku 063530. ISSN 2470-0010. E-ISSN 2470-0029
Grant CEP: GA ČR(CZ) GJ20-16531Y; GA MŠMT EF15_003/0000437
Grant ostatní: OP VVV - CoGraDS(XE) CZ.02.1.01/0.0/0.0/15_003/0000437
Institucionální podpora: RVO:68378271
Klíčová slova: gravitational radiation detector * tension * coupling constant * plasma
Obor OECD: Particles and field physics
Impakt faktor: 5, rok: 2022
Způsob publikování: Open access

We propose a novel scenario of dark matter production naturally connected with generation of gravitational waves. Dark matter is modeled as a real scalar, which interacts with the hot primordial plasma through a portal coupling to another scalar field. For a particular sign of the coupling, this system exhibits an inverse second order phase transition. The latter leads to an abundant dark matter production, even if the portal interaction is so weak that the freeze-in mechanism is inefficient. The model predicts domain wall formation in the Universe, a long time before the inverse phase transition. These domain walls have a tension decreasing with time and completely disappear at the inverse phase transition so that the problem of overclosing the Universe is avoided.
Trvalý link: https://hdl.handle.net/11104/0338578