Search for lepton-flavor-violating tau decays to $\ell \hat{I}\pm$ at Belle

Belle Collaboration, K. Uno, K. Hayasaka +123

We report a search for the lepton-flavor-violating decays $\ddot{I}{„}^{\pm }\to {\ell }^{\pm }\hat{I}\pm$~($\ell =e,\hat{I}¼$), where $\hat{I}\pm$ is an undetected spin-0 particle, such as an axion-like particle using…