Nuclear and Particle Physics, Astrophysics and Cosmology, T-2

Sterile Neutrino Dark Matter

Kevork Abazajian

Hidden in the neutrino sector may be one or more fermions with no standard model interactions that nonetheless couple to neutrinos via new mass terms. Such a particle may be the dark matter, produced in the early universe through matter-suppressed neutrino mixing or matter-enhanced resonant mixing. I will overview the kinetics of relativistic mixed neutrinos in dense environments, and will specify with sterile neutrino dark matter production in the early universe. I will discuss how this candidate alters cosmological structure formation, and may be detected in X-ray telescopes. In addition, sterile neutrino dark matter can provide a handle to probe the physics of the epoch of its creation, the QCD phase transition at high temperature.

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