Abstract
The role of the triangle mechanism in the decay process is probed. In this mechanism, a close-up resonance with mass 1823 MeV and width 122 MeV decays into and then fuses into the resonance. We find that this mechanism leads to a triangle singularity around , where the axial-vector meson is considered as a dynamically generated resonance. With the help of the triangle mechanism we find sizable branching ratios and . Such an effect from the triangle mechanism of the decay process could be investigated by such as BESIII, LHCb and Belle-II experiments. This potential investigation can help us obtain the information of the axial-vector meson .
- Received 22 August 2021
- Accepted 21 September 2021
DOI:https://doi.org/10.1103/PhysRevD.104.074016
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