The new Crystal Ball experimental program

The Crystal Ball Spectrometer is being used at the Brookhaven National Laboratory Alternating Gradient Synchrotron in a series of experiments that study final states of π-p and K-p induced reactions that result in all neutral particles. Data have been obtained on the decays of N*, Δ, λ, and Σ resonances. Threshold η production has been studied in detail for both π-p and K-p. Sequential resonance decays have been studied by studying the 2πo production mechanism both in the fundamental interaction and in nuclei. In addition, we have used the ηs produced near threshold to make precision measurements searching in particular for rare and forbidden η decays. The new limits on branching ratios provide stringent constraints on current theoretical models