Neutrino anomalies and large extra dimensions

Abstract

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.

23 Revtex pages with 2 eps figures

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• Measurement of the rate of nu_e + d --> p + p + e^- interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
• Constraints on Neutrino Oscillations Using 1258 Days of Super-Kamiokande Solar Neutrino Data
• 4-Neutrino mass schemes and the likelihood of (3+1)-mass spectra
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Cited by in corpus (14)

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• Probing Large Extra Dimensions With IceCube
• A scheme with two large extra dimensions confronted with neutrino physics
• Higher dimensional models of light Majorana neutrinos confronted by data
• Neutrinos in flat extra dimension: towards a realistic scenario
• Unitarity violation in sequential neutrino mixing in a model of extra dimensions
• Combining LSND and Atmospheric Anomalies in a Three-Neutrino Picture
• Bulk neutrinos and core collapse supernovae
• Invisible decays of Higgs and other mesons in models with singlet neutrinos in large extra dimensions
• Neutrino masses and non abelian horizontal symmetries
• Neutrino Anomalies and Quasi-Dirac neutrinos
• The hadronic tau decay of a heavy charged Higgs in models with singlet neutrino in large extra dimensions
• Neutrinos in Extra Dimensions and Supernovae
• Singlet fermions on curved extra dimension tori