Neutrino anomalies and large extra dimensions

Details Neutrino anomalies and large extra dimensions Neutrino anomalies and large extra dimensions

2001-05-28

arxiv.org/abs/hep-ph/0105288v1

Phys.Rev. D64 (2001) 073012

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 Revtex pages with 2 eps figures

Scientific paper

10.1103/PhysRevD.64.073012

Theories with large extra dimensions can generate small neutrino masses when the standard model neutrinos are coupled to singlet fermions propagating in higher dimensions. The couplings can also generate mass splittings and mixings among the flavour neutrinos in the brane. We systematically study the minimal scenario involving only one singlet bulk fermion coupling weakly to the flavour neutrinos. We explore the neutrino mass structures in the brane that can potentially account for the atmospheric, solar and LSND anomalies simultaneously in a natural way. We demonstrate that in the absence of a priori mixings among the SM neutrinos, it is not possible to reconcile all these anomalies. The presence of some structure in the mass matrix of the SM neutrinos can solve this problem. This is exemplified by the Zee model, which when embedded in extra dimensions in a minimal way can account for all the neutrino anomalies.

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