Abstract
The process and its intermediate processes are measured for the first time using a data sample collected with the Belle detector at the KEKB asymmetric-energy collider. The production of and a signal in the () invariant mass spectrum are clearly observed. However, no evidence for an exotic baryon near , denoted as () or (), is seen in the () or () invariant mass spectra. Cross sections for , and the products and are measured. We also determine upper limits on the products of the and two-photon decay widths and their branching fractions to at the 90% credibility level.
2 More- Received 9 April 2016
DOI:https://doi.org/10.1103/PhysRevD.93.112017
© 2016 American Physical Society