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Radiative Dirac neutrino mass, DAMPE dark matter and leptogenesis
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abstract
We explain the electron-positron excess reported by the DAMPE collaboration recently in a radiative Dirac seesaw model where a dark $U(1)_X$ gauge symmetry can (i) forbid the tree-level Yukawa couplings of three right-handed neutrinos to the standard model lepton and Higgs doublets, (ii) predict the existence of three dark fermions for the gauge anomaly cancellation, (iii) mediate a testable scattering of the lightest dark fermion off the nucleons. Our model can also accommodate a successful leptogenesis to generate the cosmic baryon asymmetry.
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Cited by 1 Pith paper
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Dirac neutrinos in the 2HDM with restrictive Abelian symmetries
In a 2HDM with Dirac neutrinos, only 5 of 28 maximally-restrictive zero-texture mass-matrix pairs compatible with oscillation data can be realized by Abelian flavor symmetries.
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