Minimal inverse seesaw accompanied by Dirac fermionic dark matter

Abstract

We present a minimal inverse seesaw mechanism by resorting to a $U(1{)}_{B-L}$ gauge symmetry. In order to cancel the gauge anomalies, we introduce seven neutral fermions among which four participate in the inverse seesaw to induce two nonzero neutrino mass eigenvalues, two forms a stable Dirac fermion to become a dark matter, while the last one keeps massless but decouples early. In this inverse seesaw, two neutral fermions are the usual right-handed neutrinos while the other two have a small Majorana mass term. An additional seesaw mechanism for generating these small Majorana masses also explains the cosmic baryon asymmetry in association with the sphaleron processes.

9 pages, 3 figures. arXiv admin note: text overlap with arXiv:1907.09444, arXiv:1907.10019, arXiv:1907.10018

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• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• Deducing the nature of dark matter from direct and indirect detection experiments in the absence of collider signatures of new physics
• Gauging U(1) symmetries and the number of right-handed neutrinos
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Cited by in corpus (3)

• Undemocratic Dirac seesaw
• Verifiable type-III seesaw and dark matter in a gauged $\mathbf{U}(1{)}_{\mathrm{B}-\mathrm{L}}$ symmetric model
• Dirac Neutrinos and Dark Matter within a Minimal Discrete Symmetry Model