Abstract
Using data recorded by the CLEO-II detector at Cornell Electron Storage Ring (CESR), we report the first observation of a narrow state decaying into . The state has mass difference of 178.2 ± 0.5 ± 1.0 MeV/, and a width of <5.5 MeV/ (90% confidence level limit). The most likely explanation of this new state is that it is the , the spin excitation of the charmed baryon.
- Received 15 August 1995
DOI:https://doi.org/10.1103/PhysRevLett.75.4364
©1995 American Physical Society