Unitarity violation in sequential neutrino mixing in a model of extra dimensions
arXiv:0907.0099 · doi:10.1103/PhysRevD.80.075013
Abstract
We investigate the possibility of unitarity violation in the sequential neutrino mixing matrix in a scenario with extra compact spacelike dimensions. Gauge singlet neutrinos are assumed to propagate in one extra dimension, giving rise to an infinite tower of states in the effective four-dimensional theory. It is shown that this leads to small lepton-number violating entries in the neutrino mass matrix, which can violate unitarity on the order of one per cent.
arXiv comment16 pages, 2 tables
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