Lepton flavor violation in inverse seesaw model

Abstract

We analyze the lepton flavor violation processes $\mu -e$ conversion, $l_i\to l_j\gamma$ and $l_i\to 3l_j$ in framework of the Standard Model (SM) extended with inverse seesaw mechanism, as a function of $\tilde{\eta }=1-|Det({\tilde{U}}_{PMNS})|$ that parameterizes the departure from unitary of the light neutrino mixing sub-matrix ${\tilde{U}}_{PMNS}$. In a wide range of $\tilde{\eta }$, the predictions on the $\mu -e$ conversion rates and the branching ratio of $\mu \to e\gamma$ are sizeable to be compatible with the experimental upper limits or future experimental sensitivities. For large scale of $\tilde{\eta }$, the predictions on branching ratios of other lepton flavor processes can also be reach the experimental upper limits or future experimental sensitivities. The value of $\tilde{\eta }$ depends on the determinant of the Majorana mass term $M_{\mu }$. Finally, searching for lepton flavor violation processes in experiment provides us more opportunities for the searches of seesaw nature of the neutrino masses.

Comments: 13 pages, 7 figures