（7月13日）刘晓海 研究员：New Spectrum of Charm-Strange Meson

报告人：

刘晓海研究员（天津大学）

题目：

 New Spectrum of Charm-Strange Meson

地点：

南校园陆达理堂（536栋）312室

时间：

2026年7月13日16:30

主持人：

陈伟教授

报告简介：

We systematically investigate the spectrum and decay properties of charm-strange mesons using a chiral unitary approach that combines Weinberg-Tomozawa interactions with bare cs states from the constituent quark model. The S-wave interactions in the (S,I)=(1,0) sector produce a rich DsJ spectrum with JP=0+, 1+, 1− , 2−. In addition to the well-known DK and D∗K molecular states, we also predict the existence of D1K and D2K molecular candidates. The decays of these D1K and D2K states are further studied. Triangle singularities are found to produce narrow peaks in the Ds∗π and Dsπ invariant mass spectra near the D∗K and DK thresholds, respectively. The isospin-violating decays of the D1K and D2K molecules are predicted to have sizeable partial widths, significantly enhanced by the strong couplings inherent to molecular states. This unified picture, incorporating both molecular and quark-model components, provides phenomenological signatures for identifying these exotic candidates at current experiments.

报告人简介：

刘晓海研究员，2006年本科毕业于南开大学，2011年博士毕业于中国科学院高能物理研究所，之后先后在德国波鸿鲁尔大学、北京大学、日本东京工业大学（JSPS）、德国于利希研究中心等地做博士后工作，2018年入职天津大学理学院物理系。主要研究方向为强子谱学和低能强相互作用理论，近年来的工作重点集中在奇特强子态与阈值效应的研究。