应兰州大学物理学院、萃英学院和理论物理交流中心邀请，国科大杭州高等研究院基础物理与数学科学学院马永亮教授于近日来访并作学术报告，欢迎广大师生届时参加！

主讲人：马永亮教授

题目：Baryon as a Quantum Hall Droplet and the Quark-Hadron Dualityompact star matter

时间：2021年1月7日09:30

地点：理工楼1215

联系人：刘占伟

报告摘要：

It is well known that when Nf>=2 a baryon can be regarded as topological a soliton in a mesonic theory in large Nc limit. Recently, people proposed that when Nf=1 the topological baryon becomes a quantum Hall drople. We show that this proposal can be understood as a chiral bag in a (1 + 2)-dimensional strip using the Cheshire Cat principle. For a small bag radius, the bag reduces to a vortex line which is the smile of the cat with flowing gapless quarks all spinning in the same direction. The disk enclosed by the smile is described by a topological field theory due to the Callan-Harvey anomaly outflow. The chiral bag naturally carries the unit baryon number and spin 1/2Nc. The generalization to arbitrary Nf is discussed.

个人简历：

马永亮, 国科大杭州高等研究院基础物理与数学科学学院教授,副院长。主要从事手征有效理论、强子结构、核物质性质及相关天体物理问题的研究工作。与合作者一起提出了致密核物质的赝共形模型，对核物质中夸克-强子对偶提出了新的解释，解释了原子核弱衰变中的gA 淬火问题，系统研究了强子谱的手征对偶结构等。相关工作在Phys. Rev. Lett., Phys, Rev. C、D等杂志发表文章五十余篇，受邀在Prog.Part.Nucl.Phys.等撰写综述多篇，出版英文专著一部。