Indirect searches for dark matter (DM) have conventionally been applied to the products of DM annihilation or decay. If DM couples to light force carriers, however, it can be captured into bound states via dissipation of energy that may yield detectable signals. We extend the indirect searches to DM bound state formation and transitions between bound levels, and constrain the emission of unstable dark photons. Our results significantly refine the predicted signal flux that could be observed in experiments. As a concrete example, we use Fermi-LAT dwarf spheroidal observations to obtain constraints in terms of the dark photon mass and energy which we use to search for the formation of stable or unstable bound states.
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 Université Libre de Bruxelles [ULB]
- 2 Universite Grenoblé Alpes / Grenoble Alpes University [UGA]
- 3 Nationaal instituut voor Subatomaire Fysica / National Institute for Subatomic Physics [NIKHEF]
- 4 Sorbonne Universités / Sorbonne University
- 5 Lawrence Berkeley National Laboratory [LBNL]
- 6 University of California, Berkeley [UCBL]
- Adolph C. and Mary Sprague Miller Institute for Basic Research in Science, University of California Berkeley (through Organization: University of California, Berkeley [UCBL])
- Agence Nationale de la Recherche [ANR]
- Fonds De La Recherche Scientifique - FNRS (FNRS) (through Organization: Fonds National de la Recherche Scientifique [FNRS])
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek / Netherlands Organisation for Scientific Research [NWO]
- United States Department of Energy [DOE]