Speaker
Description
We perform an effective field theory analysis using the charged lepton flavor violation diphoton operators, $\bar{\ell}_i\ell_j\gamma\gamma$. We explored the single and double radiative decays, $\ell_i\to\ell_j\gamma(\gamma)$, $e\to\mu$, $e\to\tau$, and $\mu\to\tau$ conversions in nuclei, and determined which processes can probe $\bar{\ell}_i\ell_j\gamma\gamma$ better. Using the current upper bounds on the radiative decay, $\ell_i\to\ell_j\gamma$, we can find an indirect upper bound on the double radiative decays, three orders of magnitude stronger than the direct bounds from current searches for $\mu\to e$ transitions, and four orders of magnitude better than current bounds for $\tau\to\ell\gamma\gamma$. We also find that the best limits for $\bar{\ell}_i\ell_j\gamma\gamma$ operator are provided by $\ell_i\to\ell_j\gamma$ processes, while the best future sensitivities come from $\mu\to e$ conversion in aluminum.
