title: Dark-matter decay as a complementary probe of multicomponent dark sectors.
abstract: In single-component theories of dark matter, the 2→2 amplitudes for dark-matter production, annihilation, and scattering can be related to each other through various crossing symmetries. The detection techniques based on these processes are thus complementary. However, multicomponent theories exhibit an additional direction for dark-matter complementarity: the possibility of dark-matter decay from heavier to lighter components. We discuss how this new detection channel may be correlated with the others, and demonstrate that the enhanced complementarity which emerges can be an important ingredient in probing and constraining the parameter spaces of such models.
authors.affiliation: Department of Physics, University of Arizona, Tucson, Arizona 85721 USA and Department of Physics, University of Maryland, College Park, Maryland 20742 USA.
authors.forename: Keith R
authors.initials: KR
authors.lastname: Dienes
authors.affiliation: Department of Physics, University of Hawaii, Honolulu, Hawaii 96822 USA.
authors.forename: Jason
authors.initials: J
authors.lastname: Kumar
authors.affiliation: Department of Physics, Carleton University, Ottawa, Ontario K1S 5B6 Canada.
authors.forename: Brooks
authors.initials: B
authors.lastname: Thomas
authors.affiliation: Department of Physics, University of Hawaii, Honolulu, Hawaii 96822 USA.
authors.forename: David
authors.initials: D
authors.lastname: Yaylali