期刊论文

Application of Photonuclear Reaction to Evaluating Nuclear Polarizability in Muonic Atoms

中文

原子核物理评论

1007-4627

2020

37

03

605-610

10.11804/NuclPhysRev.37.2019CNPC56

国家自然科学基金青年科学基金项目（11805078）~~；

本校为第一机构

近年来,瑞士保罗谢勒研究所的CREMA合作组通过测量µ氢原子兰姆位移显著提升了质子半径的测量精确度。然而这一新实验结果与已知质子半径标准值(CODATA)相差5.6个标准差,被称为质子半径之谜,受到众多物理学家的关注。受此启发,CREMA合作组在不同的µ原子中展开了一系列兰姆位移光谱的测量实验。他们计划从这些µ原子的测量中得到轻核(包括~(2,3)H,~(3,4)He)的电荷半径。除了对光谱测量精度的要求外,轻核半径的实验精度当前仍被一项理论输入量限制:核极化效应对µ原子光谱的修正。核极化效应体现了µ子与原子核进行双光子交换中对核的虚激发,进而对µ原子能谱产生高阶修正。因此,这一效应与光核反...

Recent measurements by CREMA Collaboration in Paul Scherrer Institute (Switzerland) determined the proton radius in Lamb shift spectroscopy of muonic hydrogen with a significantly improved precision. However, they discovered that this determination differs from the well-accepted CODATA value by 5.6 standard deviation. This discovery is named the "proton radius puzzle",and attracted interests of many physicists. Inspired by this work, the CREMA Collaboration extended their experiments in muonic hydrogen to a series of light muonic atoms/ions, in...