主持人：刘四明教授
时间：2023年7月18日（周二）16：00
地点：犀浦校区3教30345
腾讯会议号：849 273 510
题目: 从核子到奇子：谈一类新型物质
主讲人：徐仁新 北京大学物理学院教授
徐仁新，1997年获北京大学理学博士学位，并留校任讲师（1997年7月）、副教授（1999年8月）、教授（2002年8月至今）。
研究方向：核与粒子天体物理，致密星，致密物质
摘要：
众所周知，日常物质的基本单元是原子（或离子、分子，无本质差别），它们往往因之间的电磁相互作用而凝聚（即“电”凝聚态物质）。顺此逻辑，原子核也可以看作由核子构成的“强”凝聚态物质：强相互作用力将核子束缚在一起。关于这两类物质似有一惑：电物质可轻可重，难道存在比原子核重得多的强物质？我们将在这里给出肯定回答，并解释：诚然原子核的基本单元是核子，而奇子却构成大块强物质。作为一种新型物质形态，奇子物质具有多重表现形式。
Abstract:
As is well known, the basic units of normal matter are atoms (or ions, molecules, no essential differences), which would often condense due to the electromagnetic interactions in-between (i.e., “electrically” condensed matter). Along with this logic, atomic nucleus could also be regarded as “strongly” condensed matter composed of nucleons: to be bound by the fundamental strong interaction. There seems to be a question about these two types of matter: it can be light or heavy for electric matter, is there any strong matter that is much heavier than nuclei? Yes, we will present a positive answer in this talk and explain: nucleons are the basic unit of nucleus, while strangeons are for bulk strong matter. Interestingly, there could be many faces of strangeon matter in the Universe.
