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Abstract: We investigate the possibility of unitarity violation in the sequentialneutrino mixing matrix in a scenario with extra compact spacelike dimensions.Gauge singlet neutrinos are assumed to propagate in one extra dimension, givingrise 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 theneutrino mass matrix, which can violate unitarity on the order of one per cent.



Author: Subhaditya Bhattacharya, Paramita Dey, Biswarup Mukhopadhyaya

Source: https://arxiv.org/







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