Abstract
A distinct peak is observed in the invariant mass distribution near 4.43 GeV in decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of and . The product branching fraction is determined to be , where is used to denote the observed structure. The statistical significance of the observed peak is . These results are obtained from a data sample that contains pairs collected near the resonance with the Belle detector at the KEKB asymmetric energy collider.
- Received 23 October 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.142001
©2008 American Physical Society