Hot and heavy dark matter from a weak scale phase transition
Iason Baldes, Yann Gouttenoire, Filippo Sala
SciPost Phys. 14, 033 (2023) · published 14 March 2023
- doi: 10.21468/SciPostPhys.14.3.033
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Abstract
We point out that dark matter which is produced non-adiabatically in a phase transition (PT) with fast bubble walls receives a boost in velocity which leads to long free-streaming lengths. We find that this could be observed via the suppressed matter power spectrum for dark matter masses around $\mathbf{ 10^8 - 10^9}$ GeV and energy scales of the PT around $\mathbf{ 10^{2} - 10^3}$ GeV. The PT should take place at the border of the supercooled regime, i.e. approximately when the Universe becomes vacuum dominated. This work offers novel physics goals for galaxy surveys, Lyman-$\alpha$, stellar stream, lensing, and 21-cm observations, and connects these to the gravitational waves from such phase transitions, and more speculatively to possible telescope signals of heavy dark matter decay.
Cited by 17
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Iason Baldes,
- 2 Yann Gouttenoire,
- 3 Filippo Sala
- 1 Université Libre de Bruxelles [ULB]
- 2 אוניברסיטת תל אביב / Tel Aviv University [TAU]
- 3 Laboratoire de Physique Théorique et Hautes Energies / Laboratory of Theoretical and High Energy Physics [LPTHE]
- Azrieli Foundation
- Fonds De La Recherche Scientifique - FNRS (FNRS) (through Organization: Fonds National de la Recherche Scientifique [FNRS])
- Sorbonne Université / Sorbonne University