期刊
EUROPEAN PHYSICAL JOURNAL C
卷 80, 期 9, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-020-8421-9
关键词
-
资金
- development and Exchange Platform for Theoretic Physics of Southwest Jiaotong University in 2020 [11947404]
- Fundamental Research Funds for the Central Universities [2682020CX70]
- National Natural Science Foundation of China [11975041, 11735003]
- High Performance Computing Center of School of Physical Science and Technology, Southwest Jiaotong University, China
In this work, we study the strong decays of the newly observed Xi (1620)0 assuming that it is a meson-baryon molecular state of Lambda K and Sigma K. We consider four possible spin-parity assignments JP=1/2 +/- and 3/2 +/- for the Xi (1620)0, and evaluate its partial decay width into Xi pi and Xi pi pi via hadronic loops with the help of effective Lagrangians. In comparison with the Belle data, the calculated decay width favors the spin-party assignment 1/2- while the other spin-parity assignments do not yield a decay width consistent with data in the molecule picture. We find that about 52-68% of the total width comes from the KLambda channel, while the rest is provided by the KSigma channel. As a result, both channels are important in explaining the strong decay of the Xi (1620)0. In addition, the transition Xi (1620)0 -> pi Xi is the main decay channel in the JP=1/2- case, which almost saturates the total width. These information are helpful to further understand the nature of the Xi (1620)0.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据