Study of Radiative Decays of Psi(2S) Mesons
Abstract
We studied the decay psi(2S) to gamma etac(2S) with 25.9 million psi(2S) events collected with the CLEO-c detector. No psi(2S) to gamma etac(2S) decays were observed in any of the eleven exclusive etac(2S) decay modes studied. The product branching fraction upper limits were determined for all modes. The 90% confidence level upper limit of branching fraction of psi(2S) to gamma etac (2S) was obtained.
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