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arXiv · 1805.02025

$Z'$ Portal Dark Matter in $B-L$ Scotogenic Dirac Model

Zhi-Long Han·Weijian Wang
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Abstract

In this paper, we perform a detail analysis on the phenomenology of $Z'$ portal scalar and Dirac fermion dark matter in $B-L$ scotogenic Dirac model. Unconventional $B-L$ charge $Q$ is assigned to the right-handed neutrino $ν_R$ in order to realise scotogenic Dirac neutrino mass at one-loop level, where three typical value $Q=-\frac{1}{4},-4,\frac{3}{2}$ are chosen to illustrate. Observational properties involving dilepton signature at LHC, relativistic degrees of freedom $N_\text{eff}$, dark matter relic density, direct and indirect detections are comprehensively studied. Combined results of these observables for the benchmark scenarios imply that the resonance region $M_\text{DM}\sim M_{Z'}/2$ is the viable parameter space. Focusing on the resonance region, a scanning for TeV-scale dark matter is also performed to obtain current allowed and future prospective parameter space.

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Zhi-Long Han, Weijian Wang. 2018-05-05. $Z'$ Portal Dark Matter in $B-L$ Scotogenic Dirac Model. https://doi.org/10.1140/epjc%2Fs10052-018-6308-9

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