Sterile neutrino and leptonic decays of the pseudoscalar mesons
We consider a scenario with only one sterile neutrino $ N $, negligible mixing with the active neutrinos $ ν_{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 lν$ and $ ν\overlineν $, and the radiative leptonic decays $ M \rightarrow lνγ$ 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.
hep-ph↗