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arXiv · 2012.11377

Vector dark matter from a gauged $SU(2)$ symmetry

Takaaki Nomura·Hiroshi Okada·Seokhoon Yun
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Abstract

We propose a scenario of dark sector described by a hidden $SU(2)$ gauge symmetry which is broken by a vacuum expectation value(VEV) of a scalar multiplet. We discuss a general mass relation among $SU(2)$ gauge bosons after spontaneous symmetry breaking which is determined by weight of gauge group representation associated with a scalar multiplet developing VEV. Then a model with quintet and triplet scalar fields is discussed in which hidden gauge boson can be dark matter(DM) stabilized by remnant discrete $Z_2$ symmetry and resonant dark matter annihilation is realized by mass relation between DM and mediator. We estimate relic density and spin independent DM-nucleon scattering cross section searching for allowed parameter region.

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Takaaki Nomura, Hiroshi Okada, Seokhoon Yun. 2020-12-21. Vector dark matter from a gauged $SU(2)$ symmetry. https://doi.org/10.1007/jhep06(2021)122

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