Abstract
Evidence is reported for a narrow structure near the threshold in exclusive decays produced in collisions at . A signal of events, with statistical significance in excess of 3.8 standard deviations, is observed in a data sample corresponding to an integrated luminosity of , collected by the CDF II detector. The mass and natural width of the structure are measured to be and .
- Received 9 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.102.242002
©2009 American Physical Society