Effects of dark atom excitations

Abstract

New stable quarks and charged leptons may exist and be hidden from detection, as they are bound by Coulomb interaction in neutral dark atoms of composite dark matter. This possibility leads to fundamentally new types of indirect effects related to the excitation of such dark atoms followed by their electromagnetic de-excitation. Stable -2 charged particles, bound to primordial helium in O-helium (OHe) atoms, represent the simplest model of dark atoms. Here we consider the structure of OHe atomic levels which is a necessary input for the indirect tests of such composite dark matter scenarios, and we give the spectrum of electromagnetic transitions from the levels excited in OHe collisions.

Invited contribution to the special issue of Modern Physics Letters A "Indirect dark matter searches"

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Cited by in corpus (6)

• Symmetry of Cosmological Observables, and a High Hubble Constant as an Indicator of a Mirror World Dark Sector
• Probing sub-GeV mass SIMP dark matter with a low-threshold surface experiment
• Introduction to the special issue of Modern Physics Letters A "Indirect dark matter searches"
• Cool dark sector, concordance, and a low ${\sigma }_8$
• Composite dark matter and direct-search experiments
• Searching for Particle Dark Matter with eROSITA Early Data