تقرير
Classification of Coupled-Channel Near-Threshold Structures
| العنوان: | Classification of Coupled-Channel Near-Threshold Structures |
|---|---|
| المؤلفون: | Zhang, Zhen-Hua, Guo, Feng-Kun |
| سنة النشر: | 2024 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology Nuclear Theory |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment, Nuclear Theory |
| الوصف: | Since 2003, plenty of resonant structures have been observed in the heavy quarkonium regime. Many of them are close to the thresholds of a few pairs of heavy hadrons. They are candidates of exotic hadrons and have attracted immense attentions. Based on a coupled-channel nonrelativistic effective field theory, we classify the near-threshold structures of a symmetry-related two-channel system according to the scattering length and channel coupling strength. We show that the evolution of the scattering amplitude line shapes can be understood from the pole trajectories in the complex energy plane, and the pole evolution can be traced back to the renormalization group fixed points. We provide a dictionary of correspondence between the evolution of line shapes and pole trajectories, which can be used to understand the experimental observations of the near-threshold structures. Comment: 8 pages, 2 figures, 2 tables. Comments are welcome |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2407.10620 |
| رقم الأكسشن: | edsarx.2407.10620 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |