Very light asymmetric dark matter

• Verfasst von: Alonso Álvarez, Gonzalo [VerfasserIn]
• Verfasst von: Gehrlein, Julia [VerfasserIn]
• Verfasst von: Jaeckel, Joerg [VerfasserIn]
• Verfasst von: Schenk, Sebastian [VerfasserIn]
• Titel: Very light asymmetric dark matter
• Verf.angabe: Gonzalo Alonso-Álvarez, Julia Gehrlein, Joerg Jaeckel and Sebastian Schenk
• E-Jahr: 2019
• Jahr: 2 September 2019
• Umfang: ? S.
• Fussnoten: Gesehen am 15.12.2020
• Titel Quelle: Enthalten in: Journal of cosmology and astroparticle physics
• Ort Quelle: London : IOP, 2003
• Jahr Quelle: 2019
• Band/Heft Quelle: (2019,9) Artikel-Nummer 003, ? Seiten
• ISSN Quelle: 1475-7516
• DOI: doi:10.1088/1475-7516/2019/09/003
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 169370899X

Abstract

Very light dark matter is usually taken to consist of uncharged bosons such as axion-like particles or dark photons. Here, we consider the prospect of very light, possibly even sub-eV dark matter carrying a net charge that is (approximately) conserved. By making use of the Affleck-Dine mechanism for its production, we show that a sizable fraction of the energy density can be stored in the asymmetric component. We furthermore argue that there exist regions of parameter space where the energy density contained in symmetric particle-antiparticle pairs without net charge can to some degree be depleted by considering couplings to additional fields. Finally, we make an initial foray into the phenomenology of this scenario by considering the possibility that dark matter is coupled to the visible sector via the Higgs portal.