Evidence for Decays of h_c to Multi-Pion Final States

Details Evidence for Decays of h_c to Multi-Pion Final States Evidence for Decays of h_c to Multi-Pion Final States

2009-06-24

arxiv.org/abs/0906.4470v1

Phys.Rev.D80:051106,2009

Physics

High Energy Physics

High Energy Physics - Experiment

Available through http://www.lns.cornell.edu/public/CLNS/, submitted to Phys. Rev. D. (Rapid Communications)

Scientific paper

10.1103/PhysRevD.80.051106

Using a sample of 2.59 x 10^7$ psi(2S) decays collected by the CLEO--c detector, we present results of a search for the decay chain psi(2S) -> pi^0 h_c, h_c -> n(pi^+ pi^-) pi^0, n=1,2,3. We observe no significant signals for n=1 and n=3 and set upper limits for the corresponding decay rates. First evidence for the decay h_c {\o}pi^+ pi^- pi^+ pi^- pi^0 is presented, and a product branching fraction of B(psi(2S) -> h_c) x B(h_c -> 2(pi^+ pi^-) pi^0)=1.88^{+0.48+0.47}_{-0.45-0.30} x 10^{-5} is measured. This result implies that h_c -> $ hadrons and h_c -> gamma eta_c have comparable rates, in agreement with expectations.

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