Abstract
The semileptonic decays and two-body nonleptonic decays of a light baryon octet () and a decuplet () consisting of light , , quarks are studied with the SU(3) flavor symmetry. We obtain the amplitude relations between different decay modes by the SU(3) irreducible representation approach, and we then predict relevant branching ratios by presenting experimental data within error. We find that the predictions for all branching ratios except and are in good agreement with present experimental data, which implies that the neglected terms or SU(3) breaking effects might contribute on the order of a few percent in and weak decays. We predict that , , , , and . We also study weak, electromagnetic, or strong decays. Some of these decay modes could be observed by BESIII, LHCb, and other experiments in the near future. Because of the very small lifetimes of , , , and , the branching ratios of these baryon weak decays are only on the order of ), which is too small to be reached in current experiments. The longitudinal branching ratios of decays are also given.
- Received 26 June 2019
DOI:https://doi.org/10.1103/PhysRevD.100.076008
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