Neutrino masses and mixings in non-factorizable geometry

Yuval Grossman, Matthias Neubert

Research output: Contribution to journalArticlepeer-review

755 Scopus citations


We study bulk fermion fields in the localized gravity model with non-factorizable metric recently proposed by Randall and Sundrum, and Gogberashvili. In addition to a tower of weak-scale Kaluza-Klein states we find a zero mode for any value of the fundamental fermion mass. If the fermion mass is larger than half the curvature of the compact dimension, the zero mode can be localized on the 'hidden' 3-brane in the Randall-Sundrum model. Identifying this mode with a right-handed neutrino provides a new way for obtaining small Dirac neutrino masses without invoking a see-saw mechanism. Cancellation of the parity anomaly requires introducing an even number of bulk fermions. This naturally leads to a strong hierarchy of neutrino masses and generically large mixing angles. (C) 2000 Published by Elsevier Science B.V.

Original languageEnglish
Pages (from-to)361-371
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - 17 Feb 2000
Externally publishedYes

Bibliographical note

Funding Information:
We are grateful to M. Schmaltz, H. Davoudiasl, L. Dixon, Y. Nir, M. Peskin and T. Rizzo for useful discussions. Y.G. is supported by the Department of Energy under contract DE–AC03–76SF00515. M.N. is supported in part by the National Science Foundation.


  • Beyond Standard Model
  • Field theories in higher dimensions
  • Neutrino physics


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