Kosheleva V P, Volotka A V, Glazov D A, Zinenko D V, Fritzsche S
Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
Helmholtz-Institut Jena, Fröbelstieg 3, 07743 Jena, Germany.
Phys Rev Lett. 2022 Mar 11;128(10):103001. doi: 10.1103/PhysRevLett.128.103001.
The bound-electron g factor is a stringent tool for tests of the standard model and the search for new physics. The comparison between an experiment on the g factor of lithiumlike silicon and the two recent theoretical values revealed the discrepancies of 1.7σ [Glazov et al. Phys. Rev. Lett. 123, 173001 (2019)PRLTAO0031-900710.1103/PhysRevLett.123.173001] and 5.2σ [Yerokhin et al. Phys. Rev. A 102, 022815 (2020)PLRAAN2469-992610.1103/PhysRevA.102.022815]. To identify the reason for this disagreement, we accomplish large-scale high-precision computation of the interelectronic-interaction and many-electron QED corrections. The calculations are performed within the extended Furry picture of QED, and the dependence of the final values on the choice of the binding potential is carefully analyzed. As a result, we significantly improve the agreement between the theory and experiment for the g factor of lithiumlike silicon. We also report the most accurate theoretical prediction to date for lithiumlike calcium, which perfectly agrees with the experimental value.
束缚电子g因子是用于标准模型测试和寻找新物理的严格工具。类锂硅g因子的实验与最近两个理论值之间的比较揭示了1.7σ[格拉佐夫等人，《物理评论快报》123, 173001 (2019年)；PRLTAO0031 - 9007；10.1103/PhysRevLett.123.173001]和5.2σ[耶罗欣等人，《物理评论A》102, 022815 (2020年)；PLRAAN2469 - 9926；10.1103/PhysRevA.102.022815]的差异。为了找出这种不一致的原因，我们完成了电子间相互作用和多电子量子电动力学修正的大规模高精度计算。计算是在量子电动力学的扩展弗瑞图景内进行的，并仔细分析了最终值对束缚势选择的依赖性。结果，我们显著提高了类锂硅g因子理论与实验之间的一致性。我们还报告了迄今为止类锂钙最精确的理论预测，它与实验值完美吻合。
