Verifiable model of neutrino masses from large extra dimensions

We propose a new scenario of neutrino masses with a Higgs triplet (ξ++,ξ+,ξ 0) in a theory of large extra dimensions. Lepton number violation in a distant brane acts as the source of a very small trilinear coupling of ξ to the standard Higgs doublet in our brane. Small realistic Majorana neutrino masses are naturally obtained with the fundamental scale M∗ ~O(1) TeV, foretelling the possible discovery of ξ (mξ≲M∗) at future colliders. Decays of ξ++ into same-sign dileptons are fixed by the neutrino mass matrix. Observation of μ-e conversion in nuclei is predicted