There is a unique $\mathrm{SU}\left(4\right)\mathrm{}\otimes {\mathrm{SU}\left(2\right)\mathrm{}}_L\otimes {\mathrm{SU}\left(2\right)\mathrm{}}_R$ gauge model which allows quarks and leptons to be unified at the TeV scale. It is already known that the neutrino masses arise radiatively in the model and are naturally light. We study the atmospheric, solar, and LSND neutrino anomalies within the framework of this model.

• Received 11 May 2001

DOI:https://doi.org/10.1103/PhysRevD.65.015002