Abstract
We present the results of a search for the radiative decay and find evidence for decays at the 3.3 standard deviation level with a partial branching fraction of , where the first error is statistical and the second systematic. This measurement is restricted to the region of combined invariant mass less than . A 90% confidence level upper limit of is obtained for the partial branching fraction of the decay in the same invariant mass region. These results are obtained from a data sample containing pairs collected at the resonance with the Belle detector at the KEKB asymmetric-energy collider.
- Received 6 August 2009
DOI:https://doi.org/10.1103/PhysRevD.81.111104
©2010 American Physical Society