Abstract
An absolute measurement of the lifetime is reported using decays in events reconstructed from data collected by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The total integrated luminosity of the data sample, which was collected at center-of-mass energies at or near the resonance, is . The result, , where the first uncertainty is statistical and the second systematic, is the most precise measurement to date and is consistent with previous determinations.
- Received 29 June 2022
- Accepted 25 July 2022
DOI:https://doi.org/10.1103/PhysRevLett.130.071802
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