The influence of hypothetical new interactions beyond the standard model on atomic spectra has attracted recent interest. In the present work, interelectronic photon-exchange corrections and radiative quantum electrodynamic corrections to the hypothetical contribution to the energy levels of few-electron ions from a new interaction are calculated. The ground states of H-like, Li-like, and B-like ions are considered, as motivated by proposals to use isotope shift spectroscopy of few-electron ions in order to set stringent constraints on hypothetical new interactions. It is shown that, for light Li-like and B-like ions, photon-exchange corrections are comparable to or even larger than, by up to several orders of magnitude, the leading one-electron contribution from the new interaction, when the latter is mediated by heavy bosons.

中文翻译：

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新物理学对少电子离子能级贡献的辐射和光子交换校正

超出标准模型的假设新相互作用对原子光谱的影响最近引起了人们的兴趣。在目前的工作中，计算了对来自新相互作用的少电子离子能级的假设贡献的电子间光子交换校正和辐射量子电动力学校正。考虑了类 H、类锂和类 B 离子的基态，其动机是建议使用少电子离子的同位素位移谱，以便对假设的新相互作用设置严格的限制。结果表明，对于轻的类锂离子和类 B 离子，光子交换校正与来自新相互作用的主要单电子贡献相当甚至大几个数量级，当后者由重玻色子介导。