Abstract
We argue that Witten’s loop mechanism for the right-handed Majorana neutrino mass generation identified originally in the grand unification context can be successfully adopted to the class of the simplest flipped models. In such a framework, the main drawback of the prototype—in particular, the generic tension among the gauge unification constraints and the absolute neutrino mass scale—is alleviated, and a simple yet potentially realistic and testable scenario emerges.
1 More- Received 3 October 2013
DOI:https://doi.org/10.1103/PhysRevD.89.055003
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