报告题目：Emergence of near-threshold structures in heavy hadron spectrum

报告人：郭奉坤 研究员 中国科学院理论物理研究所

报告时间：2021年7月2日（星期五）下午15:00—17:00

报告地点：物理楼313

报告摘要：Tremendous progress has been made experimentally in the hadron spectrum containing heavy quarks in the last two decades. It is surprising that many resonant structures are around thresholds of a pair of heavy hadrons. By constructing a nonrelativistic effective field theory with open channels, we show that nontrivial near-threshold structures can show up as only for channels with attractive interaction, and the structure is more poronounced for heavier hadrons. Then, using a vector-meson dominance model for the interaction between two charmed hadrons, we find that there is always a near-threshold pole for attractive charmed hadron pairs. A mass spectrum of more than 200 hadronic molecules are predicted. The observed near-threshold structures with hidden-charm, like the famous X(3872) and Pc states, fit into the spectrum, and many more predicted states are to be explored experimentally.

个人简介：郭奉坤，中国科学院理论物理研究所研究员。2007年在中科院高能物理研究所获得博士学位，随后在德国于利希研究中心以及波恩大学从事博士后研究工作。2015年加入理论物理研究所。主要从事强子谱、有效场论等方面的研究工作。获第7届胡济民教育科学奖，曾担任Chiral Dynamics, PhiPsi, HADRON等国际会议的国际顾问委员会委员，PANDA实验理论顾问组成员。已发表学术论文百余篇，包括Phys. Rev. Lett. 13 篇，Rev. Mod. Phys.和Prog. Part. Nucl. Phys. 特邀综述各1篇，总引用6700余次。