Speaker
Description
The Standard Model contains four accidental, or potentially emergent, global $U(1)$ symmetries. It is possible that these symmetries are indicative of a hidden gauge structure that would couple to some anomaly-free combination of the associated currents. This would result in a new Abelian gauge boson known as a $Z'$, which would be massive if the gauge-symmetry were spontaneously broken.
Shuve and Yavin managed to show that the existence of a massive $Z'$ coupled to a sterile neutrino via mass-mixing provides a viable Dodelson-Widrow-esque dark matter production mechanism. In this talk we will investigate the implications of adding an order parameter charged under the new symmetry, a set of sterile neutrinos, and the new $Z'$ to the Standard Model. The sterile neutrinos will induce an active neutrino mass matrix, whose compatibility with the Shuve-Yavin mechanism will be investigated. We find a generic relationship that suggests sterile neutrino dark matter should not contribute significantly to active neutrino phenomenology.
Summary
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