Precision theory of muonic hydrogen and other light hydrogen-like atoms

该项目是一个国际合作项目，旨在为俄罗斯理论家在瑞士LMU、MPQ、CERN和PSI进行或计划的实验活动提供理论支持。这些实验将提供简单原子的高分辨率光谱结果，如普通和介子氢以及许多其他原子。最近，人们发现用介子光谱和普通氢光谱得到的质子电荷半径有一定的差异。该项目的工作重点是对介子氢和氘低洼态能级的精确理论。其目的是系统地发展介子氢理论，以验证以前的计算并找到新的高阶修正。预计某些理论方法也将推广应用于光和中z介子原子，以及其他原子，如正电子和介子原子。由于存在争议，还将重新审查关于这一问题的现有世界数据。

The project is an international cooperation project designed to provide atheoretical support of experimental activity, performed or planned at LMU, MPQ, CERN and PSI in Switzerland, by Russian theoreticians. The experiments will deliver high-resolution spectroscopic results on simple atoms, such as ordinary and muonic hydrogen and many others.Recently, a certain discrepancy in results for the proton charge radius, obtained from spectroscopy muonic and ordinary hydrogen, was discovered. The work within the project is focused on precision theory of energy levels of low-lying states in muonic hydrogen and deuterium. Its purpose is a systematic development of theory of muonic hydrogen in order to verify previous calculations and find new higher-order corrections.It is expected that certain theoretical methods will also be generalized for application in light and medium-Z muonic atoms, as well as to other atoms, such as, e.g., positronium and muonium.Because of the existing controversy a reexamination of existing world data on the subject will be also performed.