Abstract
We study the processes , , , and , where the photon is radiated from the initial state, providing cross section measurements for the hadronic states over a continuum of center-of-mass energies. The results are based on of data collected with the BABAR detector at SLAC. We observe the resonance in the final state and measure the product of its electronic width and branching fraction with about 3% uncertainty. We present a measurement of the cross section in the energy range from 1.06 to 2.2 GeV and observe the production of a resonance at 1.67 GeV. We present the first measurements of the , , and cross sections and study the intermediate resonance structures. We obtain the first observations of decay to the , , and final states.
35 More- Received 1 April 2014
DOI:https://doi.org/10.1103/PhysRevD.89.092002
© 2014 American Physical Society