Phys. Rev. D 65, 072002 (2002) [10 pages]Further experimental studies of two-body radiative Υ decaysReceived 2 January 2002; published 25 March 2002 Continuing our studies of radiative Υ decays, we report on a search for Υ⃗γη and Υ⃗γfJ(2220) in 61.3 pb-1 of e+e- data taken with the CLEO II detector at the Cornell Electron Storage Ring. For the γη search the three decays of the η meson to π+π-π0, π0π0π0, and γγ were investigated. We found no candidate events in the (3π)0 modes and no significant excess over expected backgrounds in the γγ mode to set a limit on the branching fraction of B(Υ⃗γη)<2.1×10-5 at 90% C.L. The three charged two-body final states hh̅ (h=π+,K+,p) were investigated for fJ(2220) production, with one, one, and two events found, respectively. Limits at 90% C.L. of B(Υ⃗γfJ)×B(fJ→hh̅ )∼1.5×10-5 have been set for each of these modes. We compare our results to measurements of other radiative Υ decays, to measurements of radiative J/ψ decays, and to theoretical predictions. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.65.072002
DOI:
10.1103/PhysRevD.65.072002
PACS:
13.20.Gd, 14.40.Gx
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