Work

Pole determination of and in the decay *

Year: 2024

Type: article

Abstract: Two near-threshold peaking structures with spin-parities of were recently discovered by the LHCb Collaboration in the invariant mass distribution of the decay process . In our study, we employed a coupled-channel model to fit the experimental results published by the LHCb Collaboration, simultaneously fitting the model to the invariant mass distributions of , , and . We utilized a coupled-channel model to search for the poles of and . The determination of the poles is meaningful in itself, and it also lays a foundation for future research on and . Upon turning off the coupled-channel and performing another fit, we observed a change in the fitting quality, and the effect was almost entirely due to the peak of . Therefore, we suggest that may not be a kinematic effect.

Source: Chinese Physics C

DOI: 10.1088/1674-1137/ad9898

Authors: Jialiang 家亮 Lu 卢, Mao 昴 Song 宋, Gang 刚 Li 李, Xuan 旋 Luo 罗

Institution: Anhui University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,295

Funder: National Natural Science Foundation of China