Light Neutrinophilic Dark Matter from a Scotogenic Model

Abstract

We present a minimal sub-GeV thermal Dark Matter (DM) model where the DM primarily interacts with neutrinos and participates in neutrino mass generation through quantum loop corrections at one-loop level. We discuss the challenges in achieving this in the scotogenic framework and identify a viable variant. Due to minimality and the interplay between obtaining the correct DM relic abundance and neutrino oscillation data, the model predicts (i) a massless lightest neutrino, (ii) enhanced rate of $0\nu \beta \beta$ decay due to loop corrections involving light DM exchange, and (iii) testable lepton flavor-violating signal $\mu \to e\gamma$. Detecting monoenergetic neutrinos from DM annihilation in next-generation neutrino detectors offers a promising way to test this scenario.

arXiv comment7 pages, 4 figures, comments are welcome!

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• New Laboratory Constraints on Neutrinophilic Mediators
• Neutrino masses and mixing from milli-charged dark matter
• Chiral dark matter and radiative neutrino masses from gauged U(1) symmetry
• Searching for MeV-mass neutrinophilic Dark Matter with Large Scale Dark Matter Detectors
• Large Neutrino-Dark Matter Interactions: From Effective Field Theory to Ultraviolet Completions