Light Neutrinos from a Mini-Seesaw Mechanism in Warped Space

Details Light Neutrinos from a Mini-Seesaw Mechanism in Warped Space Light Neutrinos from a Mini-Seesaw Mechanism in Warped Space

2010-10-13

arxiv.org/abs/1010.2659v3

Phys.Lett.B696:266-272,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 2 Figs. V3 PLB version (extended discussion, results unchanged)

Scientific paper

10.1016/j.physletb.2010.12.059

The seesaw mechanism provides a simple explanation for the lightness of the known neutrinos. Under the standard assumption of a weak scale Dirac mass and a heavy sterile Majorana scale the neutrino mass is naturally suppressed below the weak scale. However, Nature may employ Dirac and Majorana scales that are much less than typically assumed, possibly even far below the weak scale. In this case the seesaw mechanism alone would not completely explain the lightness of the neutrinos. In this work we consider a warped framework that realizes this possibility by combining naturally suppressed Dirac and Majorana scales together in a mini-seesaw mechanism to generate light neutrino masses. Via the AdS/CFT correspondence the model is dual to a 4D theory with a hidden strongly coupled sector containing light composite right-handed neutrinos.

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