Abstract
We report a measurement of the cross section for the process around the mass in search for the direct formation of through the two-photon fusion process. No enhancement of the cross section is observed at the peak and an upper limit on the product of electronic width and branching fraction of is determined to be at 90% confidence level under an assumption of total width of . This is an improvement of a factor of about 17 compared to the previous limit. Furthermore, using the latest result of , an upper limit on the electronic width of is obtained to be at the 90% confidence level.
- Received 24 September 2022
- Accepted 10 January 2023
DOI:https://doi.org/10.1103/PhysRevD.107.032007
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