Sterile neutrino and leptonic decays of the pseudoscalar mesons

Abstract

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 $M\to l\nu$ and $\nu \overline{\nu }$, and the radiative leptonic decays $M\to l\nu \gamma$ 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.

arXiv comment20 pages, 7 figures, references added and typos are corrected

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