Sterile neutrino and leptonic decays of the pseudoscalar mesons
2018
We consider a scenario with only one sterile neutrino $ N $, negligible mixing with the active neutrinos $ \nu_{L} $, where its interactions with ordinary particles could be described in a model independent approach based on an effective theory. Under such a framwork, we consider the contributions of the sterile neutrino $N$ to the pure leptonic decays $ M \rightarrow l\nu $ and $ \nu \overline{\nu} $, and the radiative leptonic decays $ M \rightarrow l\nu\gamma $ with $M$ denoting the pseudoscalar mesons $ B $, $ D $ and $ K$. We find that it can produce significant effects on some of these rare decay processes.
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