Muonic Lithium atoms: nuclear structure corrections to the Lamb shift

Abstract

In view of the future plans to measure the Lamb shift in muonic Lithium atoms we address the microscopic theory of the \mu\,μ-^66Li^{2+}2+ and \mu\,μ-^77Li^{2+}2+ systems. The goal of the CREMA collaboration is to measure the Lamb shift to extract the charge radius with high precision and compare it to electron scattering data or atomic spectroscopy to see if interesting puzzles, such as the proton and deuteron radius puzzles, arise. For this experiment to be successful, theoretical information on the nuclear structure corrections to the Lamb shift is needed. For \muμ-^66Li^{2+}2+ and \mu\,μ-^77Li^{2+}2+ there exist only estimates of nuclear structure corrections based on experimental data that suffer from very large uncertainties. We present the first steps towards an ab initio computation of these quantities using few-body techniques.