Light Sterile Neutrinos from Large Extra Dimensions
  An experimentally verifiable Higgs-triplet model of neutrino masses from large extra dimensions was recently proposed. We extend it to accomodate a light sterile neutrino which also mixes with the three active neutrinos. A previously proposed phenomenological model of four neutrinos (\underline {the only viable such model now left}, in view of the latest atmospheric and solar neutrino-oscillation data) is specifically realized. 
Ernest Ma (UC Riverside), G. Rajasekaran (IMSC, Madras), Utpal Sarkar   (PRL, Ahmedabad)