Speaker
Ryotaro Minato
(Yokohama National University)
Description
We propose a new charged lepton flavor violating (CLFV) process: the decay of true muonium $(\mu^+ \mu^-)$ into a lepton pair of different flavors, $\mu^\pm e^\mp$. This purely leptonic, hadron-free process provides a clean signature and enables the probing of both photonic dipole and four-fermion CLFV interactions. Since CLFV mediators indirectly appear in most CLFV processes, it is important to search for various types of processes to identify the new particles responsible. We calculate the branching ratio using scalar, vector, and dipole operators, and by comparing with existing experimental constraints, we show it can reach $\mathcal{O}(10^{-20})$.
Authors
Akira Sato
(The University of Osaka)
Masato Yamanaka
(Hiroshima Institute of Technology)
Ryosuke Suda
(Saitama University)
Ryotaro Minato
(Yokohama National University)