Charmonium Decays of Y(4260), ψ(4160), and ψ(4040)

T. E. Coan et al. (CLEO Collaboration)
Phys. Rev. Lett. 96, 162003 – Published 28 April 2006

Abstract

Using data collected with the CLEO detector operating at the CESR e+e collider at s=3.974.26GeV, we investigate 15 charmonium decay modes of the ψ(4040), ψ(4160), and Y(4260) resonances. We confirm, at 11σ significance, the BABAR Y(4260)π+πJ/ψ discovery, make the first observation of Y(4260)π0π0J/ψ (5.1σ), and find the first evidence for Y(4260)K+KJ/ψ (3.7σ). We measure e+e cross sections at s=4.26GeV as σ(π+πJ/ψ)=5810+12±4pb, σ(π0π0J/ψ)=238+12±1pb, and σ(K+KJ/ψ)=95+9±1pb, in which the uncertainties are statistical and systematic, respectively. Upper limits are placed on other decay rates from all three resonances.

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  • Received 20 February 2006

DOI:https://doi.org/10.1103/PhysRevLett.96.162003

©2006 American Physical Society

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Vol. 96, Iss. 16 — 28 April 2006

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