Abstract
A search for a massless dark photon is conducted using of collision data collected at center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII. No significant signal is observed, and the upper limit on the branching fraction is determined to be at 90% confidence level.
- Received 9 August 2022
- Accepted 12 October 2022
DOI:https://doi.org/10.1103/PhysRevD.106.072008
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