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Rapid Bound State Formation of Dark Matter in the Early Universe.
- Source :
-
Physical Review Letters . 4/24/2020, Vol. 124 Issue 16, p1-1. 1p. - Publication Year :
- 2020
-
Abstract
- The formation and decay of dark matter (DM) bound states deplete the thermal relic density during the chemical decoupling process, allowing for larger DM masses. While so far the bound state formation (BSF) has been described via the emission of an on-shell mediator, we point out that this particular process does not have to be the dominant one in general. If the mediator is coupled in a direct way to any relativistic species present in the early Universe, we demonstrate that BSF can much more efficiently occur through particle scattering. Consequently, DM can be heavier than previously expected. [ABSTRACT FROM AUTHOR]
- Subjects :
- *DARK matter
*STATE formation
*SCATTERING (Physics)
*CHEMICAL processes
Subjects
Details
- Language :
- English
- ISSN :
- 00319007
- Volume :
- 124
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Physical Review Letters
- Publication Type :
- Academic Journal
- Accession number :
- 143836652
- Full Text :
- https://doi.org/10.1103/PhysRevLett.124.161102