Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-06-07
Phys.Lett. B627 (2005) 131-136
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 3 figures
Scientific paper
10.1016/j.physletb.2005.08.115
Little Higgs models are formulated as effective theories with a cut-off of up to 100 times the electroweak scale. Neutrino masses are then a puzzle, since the usual see-saw mechanism involves a much higher scale that would introduce quadratic corrections to the Higgs mass parameter. We propose a model that can naturally accommodate the observed neutrino masses and mixings in Little Higgs scenarios. Our framework does not involve any large scale or suppressed Yukawa couplings, and it implies the presence of three extra (Dirac) neutrinos at the TeV scale. The masses of the light neutrinos are induced radiatively, they are proportional to small (\approx keV) mass parameters that break lepton number and are suppressed by the Little Higgs cut-off.
Aguila Del F.
Masip Manuel
Padilla J. L.
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