General Approach to Neutrino Mass Mechanisms with Sterile Neutrinos

Abstract

We present a mathematical framework for constructing the most general neutrino mass matrices that yield the observed spectrum of light active neutrino masses in conjunction with arbitrarily many heavy sterile neutrinos, without the need to assume a hierarchy between Dirac and Majorana mass terms. The seesaw mechanism is a byproduct of the formalism, along with many other possibilities for generating tiny neutrino masses. We comment on phenomenological applications of this approach, in particular deriving a mechanism to address the long-standing $(g-2{)}_{\mu }$ anomaly in the context of the left-right symmetric model.

arXiv comment5 pages and appendices, 2 figures; v2: published version

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Cited by in corpus (1)

• Large Neutrino-Dark Matter Interactions: From Effective Field Theory to Ultraviolet Completions