Using the CLEO detector at the Cornell Electron Storage Ring we have observed the [Formula presented] ([Formula presented] ground state) in the decay [Formula presented]. We find a signal of [Formula presented] events. The probability that we have observed a background fluctuation is [Formula presented]. We measure [Formula presented] and [Formula presented]. This is the first statistically significant observation of an individual decay mode of the [Formula presented] in [Formula presented] annihilation and the first example of a baryon decaying via [Formula presented] emission, where no quarks from the first generation participate in the reaction.

Additional Metadata
Persistent URL
Journal Physical Review Letters
Ammar, R. (R.), Besson, D. (D.), Zhao, X. (X.), Anderson, S. (S.), Frolov, V.V. (V. V.), Kubota, Y. (Y.), … Edwards, K.W. (2002). Observation of the Decay [Formula presented]. Physical Review Letters, 89(17). doi:10.1103/PhysRevLett.89.171803