Neutrino Masses in Theories with Dynamical Electroweak Symmetry Breaking

Details Neutrino Masses in Theories with Dynamical Electroweak Symmetry Breaking Neutrino Masses in Theories with Dynamical Electroweak Symmetry Breaking

2002-04-12

arxiv.org/abs/hep-ph/0204141v2

Phys.Lett. B548 (2002) 204-214

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, latex; simplified model

Scientific paper

10.1016/S0370-2693(02)02854-X

We address the problem of accounting for light neutrino masses in theories with dynamical electroweak symmetry breaking. We discuss this in the context of a class of (extended) technicolor (ETC) models and analyze the full set of Dirac and Majorana masses that arise in such theories. As a possible solution, we propose a combination of suppressed Dirac masses and a seesaw involving dynamically generated $|\Delta L|=2$ condensates of standard-model singlet, ETC-nonsinglet fermions. We show how this can be realized in an explicit ETC model. An important feature of this proposal is that, because of the suppression of Dirac neutrino mass terms, a seesaw yielding realistic neutrino masses does not require superheavy Majorana masses; indeed, these Majorana masses are typically much smaller than the largest ETC scale.

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