Using 5.63pb-1 of data accumulated at the ψ(2S) resonance with the CLEO III and CLEO-c detectors corresponding to 3.08×106 ψ(2S) decays, a search is performed for the decay ψ(2S)→ηcπ+π-π0 to test a theoretical prediction based upon the assumption that the cc̄ pair in the ψ(2S) does not annihilate directly into three gluons but rather survives before annihilating. No signal is observed, and a combined upper limit from six ηc decay modes is determined to be B(ψ(2S)→ηcπ+π-π0) ≤1.0×10-3 at 90% C.L. This upper limit is about an order of magnitude below the theoretical expectation.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 29 Jan 2007|
Copyright 2007 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)