Abstract
Based on 10 billion events collected at the BESIII experiment, a search for violation in decay is performed in the difference between -odd decay parameters for and for by using the process . With a five-dimensional fit to the full angular distributions of the daughter baryon, the most precise values for the decay parameters are determined to be and , respectively. The and averaged value of the decay parameter is extracted to be with unprecedented accuracy. The asymmetry is determined to be , which is one of the most precise measurements in the baryon sector. The reported results for the decay parameter will play an important role in the studies of the polarizations and violations for the strange, charmed and beauty baryons.
- Received 26 April 2022
- Accepted 1 September 2022
DOI:https://doi.org/10.1103/PhysRevLett.129.131801
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