title: Model for Thermal Relic Dark Matter of Strongly Interacting Massive Particles.
abstract: A recent proposal is that dark matter could be a thermal relic of 3→2 scatterings in a strongly coupled hidden sector. We present explicit classes of strongly coupled gauge theories that admit this behavior. These are QCD-like theories of dynamical chiral symmetry breaking, where the pions play the role of dark matter. The number-changing 3→2 process, which sets the dark matter relic abundance, arises from the Wess-Zumino-Witten term. The theories give an explicit relationship between the 3→2 annihilation rate and the 2→2 self-scattering rate, which alters predictions for structure formation. This is a simple calculable realization of the strongly interacting massive-particle mechanism.
authors.affiliation: Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA.|Department of Physics, University of California, Berkeley, California 94720, USA.
authors.forename: Yonit
authors.initials: Y
authors.lastname: Hochberg
authors.affiliation: Department of Physics, LEPP, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Eric
authors.initials: E
authors.lastname: Kuflik
authors.affiliation: Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA.|Department of Physics, University of California, Berkeley, California 94720, USA.|Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo Institutes for Advanced Study, University of Tokyo, Kashiwa 277-8583, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Murayama
authors.affiliation: Department of Physics, Tel Aviv University, Tel Aviv 6997801, Israel.
authors.forename: Tomer
authors.initials: T
authors.lastname: Volansky
authors.affiliation: Quora, Mountain View, California 94041, USA.|Stanford Institute for Theoretical Physics, Stanford University, Stanford, California 94305, USA.
authors.forename: Jay G
authors.initials: JG
authors.lastname: Wacker