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arXiv · 1606.09317

Right-handed neutrino dark matter under the B-L gauge interaction

Kunio Kaneta·Zhaofeng Kang·Hye-Sung Lee
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Abstract

We study the right-handed neutrino (RHN) dark matter candidate in the minimal U(1)_{B-L} gauge extension of the standard model. The U(1)_{B-L} gauge symmetry offers three RHNs which can address the origin of the neutrino mass, the relic dark matter, and the matter-antimatter asymmetry of the universe. The lightest among the three is taken as the dark matter candidate, which is under the B-L gauge interaction. We investigate various scenarios for this dark matter candidate with the correct relic density by means of the freeze-out or freeze-in mechanism. A viable RHN dark matter mass lies in a wide range including keV to TeV scale. We emphasize the sub-electroweak scale light B-L gauge boson case, and identify the parameter region motivated from the dark matter physics, which can be tested with the planned experiments including the CERN SHiP experiment.

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Kunio Kaneta, Zhaofeng Kang, Hye-Sung Lee. 2017-02-06. Right-handed neutrino dark matter under the B-L gauge interaction. https://doi.org/10.1007/jhep02(2017)031

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