Recent Bottomonium and Charmonium Results from Cleo

The Cornell electron-positron storage ring (CESR) is a symmetric e+e− collider located on the Cornell University campus in Ithaca, NY. For almost 30 years, the accelerator has been running in the Upsilon energy region from √ s = 9-11 GeV , providing the accompanying detector, CLEO, with data to produce results on B, Υ, τ , charm, and 2-photon physics. Roughly 2 years ago, the accelerator was modified with the addition of wiggler magnets to allow it to run in the √ s = 3-5 GeV charmonium energy region. CLEO 1 is a standard 4π e+e− magnetic spectrometer. In its latest configuration, called CLEO-c, it consists of inner and main drift chambers for charged particle tracking, a CsI electromagnetic calorimeter, and a Ring-Imaging Cherenkov detector (RICH), all enclosed in a 1 T solenoidal magnetic field. The charged particle momentum resolution is 0.6% at 1.0 GeV /c and the photon energy resolution is 4% at 100 MeV . Paticle identification is done using both the RICH and dE/dx measurements in the drift chambers. Muon chambers interspersed in the magnet iron outside the solenoid complete the detector.