2017/12/14 by Oscar Javier Hernandez, Sonia Bacca, Hernandez, Oscar Javier +3
Engineering · Physics and Astronomy · #Atomic and Molecular Physics #FOS: Physical sciences #Muon and positron interactions and applications #Nuclear Theory (nucl-th) #Nuclear physics research studies
paper · pdf · doi:10.48550/arxiv.1712.05187
openalex publication_date 2017/12/14 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
The discovery of the proton-radius puzzle and the subsequent deuteron-radius\npuzzle is fueling an on-going debate on possible explanations for the\ndifference in the observed radii obtained from muonic atoms and from\nelectron-nucleus systems. Atomic nuclei have a complex internal structure that\nmust be taken into account when analyzing experimental spectroscopic results.\nAb initio nuclear structure theory provided the so far most precise estimates\nof important corrections to the Lamb shift in muonic atoms and is well poised\nto also investigate nuclear structure corrections to the hyperfine splitting in\nmuonic atoms. Independently on whether the puzzle is due to\nbeyond-the-standard-model physics or not, nuclear structure corrections are a\nnecessary theoretical input to any experimental extraction of electric and\nmagnetic radii from precise muonic atom measurements.\n Here, we review the status of the calculations performed by the TRIUMF-Hebrew\nUniversity group, focusing on the deuteron, and discuss preliminary results on\nmagnetic sum rules calculated with two-body currents at next-to-leading order.\nTwo-body currents will be an important ingredient in future calculations of\nnuclear structure corrections to the hyperfine splitting in muonic atoms.\n