Abstract
We search for the M1 radiative transition by reconstructing the exclusive decay using events collected with the BESIII detector. The signal is observed with a statistical significance of greater than 4 standard deviations. The measured mass of the is , and the width is . The product branching fraction is measured to be . This measurement complements a previous BESIII measurement of with and .
- Received 8 January 2013
DOI:https://doi.org/10.1103/PhysRevD.87.052005
© 2013 American Physical Society