学术讲座
Hiroyuki Sagawa:QCD sum rule approach to Charge symmetry breaking EDF
发布时间:2024-11-01   浏览次数:10

报告题目:QCD sum rule approach to Charge symmetry breaking EDF

时间2024118日下午15:00

告地点:物理楼314

人:周先荣教授

告人:Hiroyuki Sagawa 教授

告人位:日本理化学研究所、会津大学

报告摘要:Microscopic approach based on quantum chromodymanics (QCD) is the most challenging ab initio theory for nuclear structure physics. In this respect, QCD sum rule gives a powerful tool, but numerically not highly demanding, to cross a bridge the QCD and hadron spectroscopy such as meson and baryon masses in terms of chiral symmetry breaking due to quark condensation. In nuclear medium, a partial restoration of the chiral symmetry breaking is found in the pionic atom experiments. In my talk, I will present the QCD sum rule approach to the anomaly in the mass difference of mirror nuclei, known as Okamoto-Nolen-Schiffer (ONS) anomaly, which is not yet solved by fully microscopic theory. Our approach is intimately related with the partial restoration of the chiral symmetry breaking in nuclear medium and provides a quantitative solution of the ONS anomaly in the mass difference between protons and neutrons in nuclear medium. I will also mention the charge symmetry breaking effect in hyper nuclei which is observed recently.

报告人简介:Hiroyuki Sagawa教授是日本理化学研究所仁科中心和会津大学数理学中心教授与主任、国知名的原子核物理学家。1975年毕业于日本北大学后,先后在世界各地的尖研究机构如丹麦的Niels Bohr研究所、美国密歇根州大学、日本京大学以及荷阿姆斯特丹核能与高能研究所等地行研究工作。同担任法国巴黎南大学、瑞典Lund institute of technology和意大利Milano University的客座教授。在原子核物理域,Sagawa教授在核构、 核转动、巨共振、量相关的HF算、弱束核中和双核子关、QCD求和规则称性破缺等方面取得了突出成就。他在尖学期刊如PRL、PPNP等表了500多篇重要学术论文,并撰写了多本包括量子力学在内的教科。他的研究成果在国生了深影响,原子核物理域做出了重要献。