High-precision measurement of the atomic mass of the electron
High-precision measurement of the atomic mass of the electron
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DOI：
10.1038/nature13026
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发表时间：
2014-02-27
期刊：
影响因子：
64.8
通讯作者：
Blaum, K.
中科院分区：
文献类型：
--
作者：
Sturm, S.;Koehler, F.;Blaum, K.
在过去的几十年里，对电子原子质量值的探索一直是持续努力的主题（1-4）。在物理学标准模型（5）的参数化，从而负责其预测能力的看似基本的常数中，电子质量m（e）是突出的，负责原子和分子的结构和性质。它与其他基本常数密切相关，如里德伯常数R-无穷大和精细结构常数α（参考文献6）。然而，电子的低质量使其精确测定变得相当复杂。在这里，我们结合联合收割机的一个非常精确的测量的磁矩的一个单一的电子绑定到一个碳核的国家的最先进的计算框架中的束缚态量子电动力学。由此得到的电子原子质量值的精确度超过了科学和技术数据委员会（CODATA（6））目前文献值的13倍。这一结果为以后的基础物理实验（7，8）和标准模型的精度检验（9-11）奠定了基础。
The quest for the value of the electron's atomic mass has been the subject of continuing efforts over the past few decades(1-4). Among the seemingly fundamental constants that parameterize the Standard Model of physics(5) and which are thus responsible for its predictive power, the electron mass m(e) is prominent, being responsible for the structure and properties of atoms and molecules. It is closely linked to other fundamental constants, such as the Rydberg constant R-infinity and the fine-structure constant alpha (ref. 6). However, the low mass of the electron considerably complicates its precise determination. Here we combine a very precise measurement of the magnetic moment of a single electron bound to a carbon nucleus with a state-of-the-art calculation in the framework of bound-state quantum electrodynamics. The precision of the resulting value for the atomic mass of the electron surpasses the current literature value of the Committee on Data for Science and Technology (CODATA(6)) by a factor of 13. This result lays the foundation for future fundamental physics experiments(7,8) and precision tests of the Standard Model(9-11).