Search for the Radiative Leptonic Decay D+ → γe+νe

摘要: Using an electron-positron collision data sample of 2.93 fb collected at a center-of-mass energy of √s = 3.773 GeV with the BESIII detector, we present the first search for the radiative leptonic decay D+ →+γe+νe.+ The analysis is performed with a double tag method. We do not+ observ+e a significant D → γe νe signal, and obtain an upper limit on the branching fraction of D → γe νe decay with the energy of radiative photon larger than 10 MeV of 3.0 × 10 at the 90% confidence level.