Abstract
Using data samples collected by the BESIII detector operating at the BEPCII storage ring, we measure the Born cross sections at center-of-mass energies between 3.8 and 4.6 GeV, corresponding to a luminosity of about . The results are compatible with the BABAR measurements, but with the precision significantly improved. A simple dependence for the continuum process can describe the measured cross sections, but a better fit is obtained by an additional resonance near 4.2 GeV, which could be an excited charmonium or a charmoniumlike state.
- Received 29 August 2018
DOI:https://doi.org/10.1103/PhysRevD.99.072005
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society