Empirical Determination of the Bohr-Weisskopf Effect in Cesium and Improved Tests of Precision Atomic Theory in Searches for New Physics
Date
2023
Authors
Sanamyan, G.
Roberts, B.M.
Ginges, J.S.M.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Physical Review Letters, 2023; 130(5)
Statement of Responsibility
G. Sanamyan, B. M. Roberts, and J. S. M. Ginges
Conference Name
Abstract
The finite distribution of the nuclear magnetic moment across the nucleus gives a contribution to the hyperfine structure known as the Bohr-Weisskopf (BW) effect. We have obtained an empirical value of −0.24ð18Þ% for this effect in the ground and excited s states of atomic 133Cs. This value is found from historical muonic-atom measurements in combination with our muonic-atom and atomic many-body calculations. The effect differs by 0.5% in the hyperfine structure from the value found using the uniform magnetization distribution, which has been commonly employed in the precision heavy-atom community over the last several decades. We also deduce accurate values for the BWeffect in other isotopes and states of cesium. These results enable cesium atomic wave functions to be tested in the nuclear region at an unprecedented 0.2% level, and are needed for the development of precision atomic many-body methods. This is important for increasing the discovery potential of precision atomic searches for new physics, in particular for atomic parity violation in cesium.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
© 2023 American Physical Society