Lepton flavor violating Z-decays in supersymmetric see-saw model

Abstract

In supersymmetric see-saw model, the large flavor mixings of sleptons induce the lepton flavor violating (LFV) interactions ${\ell }_I{\bar{\ell }}_{J}V$ ($V=\gamma ,Z$), which give rise to various LFV processes. In this work we examine the induced LFV decays $Z\to {\ell }_I{\bar{\ell }}_J$. Subject to the constraints from the existing neutrino oscillation data and the experimental bounds on the decays ${\ell }_J\to {\ell }_I\gamma$, these LFV $Z$-decays are found to be sizable, among which the largest-rate channel $Z\to \tau \bar{\mu }$ can ocuur with a branching ratio of $10^{-8}$ and may be accessible at the LHC or GiagZ experiment.

Comments: 8 pages,4 ps files, to appear in EPJC