Feasibility study for a search for τ→μ+γ decay at Super c−τ factory

A Monte Carlo study of possible background processes in a search for $\tau \to \mu \gamma$ decay has been performed for conditions of the Super $c-\tau$ factory (SCTF) at a center-of-mass energy 3.686 GeV, 3.77 GeV and 4.17 GeV. The background from ${\tau }^{+}{\tau }^{-}$ events has been analysed. Selection criteria for background suppression are suggested and necessary requirements on the detector characteristics have been found. A possible upper limit for $B_{\tau \to \mu \gamma }$ at SCTF is about $(1.5÷2.5)\times {10}^{-10}$. The SCTF can successfully compete with the Super B-factory in a search for $\tau \to \mu \gamma$ decay.