Abstract
A precision measurement of the mass of the state of charmonium has been made using a sample of events produced in annihilation at the Cornell Electron Storage Ring (CESR). The reaction used was , , , and the reaction products were detected in the CLEO-c detector. Data have been analyzed both for the inclusive reaction and for the exclusive reactions in which decays are reconstructed in 15 hadronic decay channels. Consistent results are obtained in the two analyses. The averaged results of the present measurements are , and . Using the centroid mass, .
- Received 28 May 2008
DOI:https://doi.org/10.1103/PhysRevLett.101.182003
©2008 American Physical Society