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Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory
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abstract
Recent progress in laser and x-ray spectroscopy of muonic atoms offers promising long-term possibilities at the intersection of atomic, nuclear and particle physics. In muonic hydrogen, laser spectroscopy measurements will determine the ground-state hyperfine splitting (HFS) and additionally improve the Lamb shift by a factor of 5. Precision spectroscopy with cryogenic microcalorimeters has the potential to significantly improve the charge radii of the light nuclei in the $Z=3-8$ range. Complementary progress in precision should be achieved on the theory of nucleon- and nuclear-structure effects. The impact of this muonic-atom spectroscopy program will be amplified by the upcoming results from H and He$^+$ spectroscopy, simple molecules such as HD$^+$ and Penning trap measurements. In this broader context, one can test ab-initio nuclear theories, bound-state QED for two- or three-body systems, and determine fundamental constants, such as the Rydberg ($R_\infty$) and the fine-structure ($\alpha$) constants.
Forward citations
Cited by 3 Pith papers
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Testing for isospin symmetry breaking with extensive calculations of isotope shift factors in potassium
Improved potassium isotope-shift factors and updated nuclear polarizability corrections give a more precise radius for 38mK and an isospin-breaking test in the A=38 isotriplet that is consistent with zero.
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Hadronic vacuum polarization effect in muonic atoms
Hadronic vacuum polarization shifts in muonic atoms across the periodic table remain near 67% of the muonic vacuum polarization shift, with few-percent nuclear model dependence.
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Recent Progress in Ab-Initio Nuclear Theory for Precision Physics Searches in Muonic Atoms and Superallowed $\beta$ Decays
Ab initio nuclear theory for two-photon exchange in muonic atoms and the γW box in superallowed β decays shares one hadronic tensor, with recent light-nuclei results impacting charge radii, the helium isotope shift, and Vud.
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