Observation of psi(3770) --> gamma chi_c0
High Energy Physics - Experiment
2010-04-08 v2
Abstract
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.
Cite
@article{arxiv.hep-ex/0605070,
title = {Observation of psi(3770) --> gamma chi_c0},
author = {R. A. Briere and CLEO Collaboration},
journal= {arXiv preprint arXiv:hep-ex/0605070},
year = {2010}
}
Comments
11 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2006/, Submitted to Phys. Rev. D (Rapid Communications)