應蘭州大學物理學院、萃英學院和理論物理交流中心邀請，國科大杭州高等研究院基礎物理與數學科學學院馬永亮教授於近日來訪並作學術報告，歡迎廣大師生屆時參加！

主講人：馬永亮教授

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

時  間：2021年1月7日09:30

地  點：理工樓1215

聯繫人：劉佔偉

報告摘要：

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.

個人簡歷：

馬永亮，國科大杭州高等研究院基礎物理與數學科學學院教授、副院長。主要從事手徵有效理論、強子結構、核物質性質及相關天體物理問題的研究工作。與合作者一起提出了緻密核物質的贗共形模型，對核物質中夸克-強子對偶提出了新的解釋，解釋了原子核弱衰變中的gA 淬火問題，系統研究了強子譜的手徵對偶結構等。相關工作在Phys. Rev. Lett., Phys, Rev. C,D等雜誌發表文章五十餘篇，受邀在Prog.Part.Nucl.Phys.等撰寫綜述多篇，出版英文專著一部。