Sensitivity study of the charged lepton flavor violating process at STCF

A sensitivity study for the search for the charged lepton flavor violating process tau -> gamma mu at the Super tau-Charm Facility is performed with a fast simulation. With the expected performance of the current detector design and an integrated luminosity of 1ab(-1) corresponding to one-year of data taking, the sensitivity on the branching fraction (BF) of tau -> gamma mu is estimated to be at the level of 10(-8). The sensitivity under different detector performances are also studied. With ideal performance, the BF could be probed to be 2.8 x 10(-8) at 90% confidence level. The sensitivity is expected to scale with the square root of the luminosity, therefore with a total luminosity of 10ab(-1) corresponding to ten-year of data taking, the sensitivity could reach 8.8 x 10(-9), which is about one order of magnitude improvement upon the current best upper limit.