主讲人：马永亮教授（国科大杭州高等研究院基础物理与数学科学学院）

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

时 间：2021年1月7日（周四）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.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。