On Neutrino Masses and Mixings from Extra Dimensions

Details On Neutrino Masses and Mixings from Extra Dimensions On Neutrino Masses and Mixings from Extra Dimensions

1999-07-07

arxiv.org/abs/hep-ph/9907272v2

Phys.Lett. B470 (1999) 149-156

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages latex, no figure; small modifications in discussions; version to appear in Phys.Lett. B

Scientific paper

10.1016/S0370-2693(99)01340-4

In the framework of a Kaluza-Klein type theory with the Standard Model fields localized on a 4-dimensional section while gravity propagates in a full $4+\delta$-dimensional space-time, we examine a mechanism of naturally small neutrino mass generation through couplings of Standard Model singlet fermion(s) living also in the full space-time. A numerical studies is carried out on the charged current universality constraint from the ratio of pion decay partial widths. The bounds obtained on the fundamental mass scale could be stringent.

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