Gao, Kaiyan2009-03-042009-03-042008-12https://hdl.handle.net/11299/47963University of Minnesota Ph.D. dissertation. December 2008. Major: Physics. Advisor: Ronald Poling. 1 computer file (PDF); xi, 184 pages, appendices A-B. Ill. (some col.)We studied the decay ψ(2S) → γ η<sub>c</sub>(2S) with 25.9 × 10 <super>6</super> ψ(2S) events collected with the CLEO-c detector. No ψ(2S) → γ η<sub>c</sub>(2S) decays were observed in any of the eleven exclusive η<sub>c</sub>(2S) decay modes studied. The product branching fraction upper limits were determined for all modes. The 90% confidence level upper limit of B(ψ(2S) → γ η<sub>c</sub>(2S)) < 7.4 × 10<super>-4</super>was obtained.en-USCLEOEtac(2S)Psi(2S)Radiative DecayPhysicsStudy of radiative decays of Psi(2s) mesons.Thesis or Dissertation