Narrow Results

We present the first results from a recent pilot run of the CLEO-c experiment. This new program investigates the physics of charm mesons and charmonium resonances. We begin with results on two-body decays of the ψ(2S); first observations of some highly-suppressed "PV" modes are presented. Next, data taken at the ψ(3770) are used for a variety of studies of D meson decays in a very clean environment. We report the cross-section at the ψ(3770), extract f_D from the first significant sample of D⁺→μ⁺ν_μ decays, and investigate both inclusive and exclusive semileptonic D decays.

In this conference presentation I discuss CLEO-c opportunities in Dalitz plot analyzes with the data samples available now and projected by the end of CESR-c run. Using 281 pb^-1 of e⁺e^- collisions at mass of ψ(3770) we present results of the Dalitz plot analysis of D⁺ → π^-π⁺π⁺. Using the CLEO-c and CLEO III samples of 5 pb^-1, accrued at mass of ψ(2S), we study three body decays of χ_cJ produced in the radiative decay ψ(2S) → γχ_cJ, where J=0,1,2. A clear signal from at least one of χ_cJ is found in eight final states: π⁺π^-η, π⁺π^-η′, K⁺K^-π⁰, , ηK⁺K^-, , , and . For these modes we measured or set an upper limit on the branching fraction. A Dalitz plot analysis is performed on three modes χ_c1 → π⁺π^-η, K⁺K^-π⁰, and .

Recent experimental results from BES and CLEO are reviewed, including the hadron spectroscopy from J/ψ decays, decay studies of ψ(2S) and χ_CJ, the results for D decays and ψ(3770) decays. The future plans for both experiments are also reported.

Recent experimental results from BES and CLEO are reviewed, including the hadron spectroscopy from J/ψ decays, decay studies of ψ(2S) and χ_CJ, the results for D decays and ψ(3770) decays. The future plans for both experiments are also reported.