Lamb shift of electronic states in neutral muonic helium, an electron-muon-nucleus system

作者：Karshenboim Savely G^*; Ivanov Vladimir G; Amusia Miron

来源：Physical Review A, 2015, 91(3): 032510.

DOI：10.1103/PhysRevA.91.032510

Neutral muonic helium is an exotic atomic system consisting of an electron, a muon, and a nucleus. Being a three-body system, it possesses a clear hierarchy. This allows us to consider it as a hydrogenlike atom with a compound nucleus, which is, in turn, another hydrogenlike system. There are a number of corrections to the Bohr energy levels, all of which can be treated as contributions of generic hydrogenlike theory. While the form of those contributions is the same for all hydrogenlike atoms, their relative numerical importance differs from atom to atom. Here, the leading contribution to the (electronic) Lamb shift in neutral muonic helium is found in a closed analytic form together with the most important corrections. We believe that the Lamb shift in neutral muonic hydrogen is measurable, at least through a measurement of the (electronic) 1s-2s transition. We present a theoretical prediction for the 1s-2s transitions with an uncertainty of 3 ppm (9 GHz), as well as for the 2s-2p Lamb shift with an uncertainty of 1.3 GHz.

• 出版日期2015-3-23