Observation of psi(3770) --> gamma chi_c0

Details Observation of psi(3770) --> gamma chi_c0 Observation of psi(3770) --> gamma chi_c0

2006-05-16

arxiv.org/abs/hep-ex/0605070v2

Phys.Rev.D74:031106,2006

Physics

High Energy Physics

High Energy Physics - Experiment

11 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2006/, Submitted to Phys. Rev. D (Rapid Co

Scientific paper

10.1103/PhysRevD.74.031106

From e+e- collision data acquired with the CLEO-c detector at CESR, we search for the non-DDbar decays psi(3770) -> gamma chi_cJ, with chi_cJ reconstructed in four exclusive decays modes containing charged pions and kaons. We report the first observation of such decays for J=0 with a branching ratio of (0.73+-0.07+-0.06)%. The rates for different J are consistent with the expectations assuming psi(3770) is predominantly a 1^3D_1 state of charmonium, but only if relativistic corrections are applied.

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