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arXiv · 1812.10993

Deuteron charge radius from the Lamb-shift measurement in muonic deuterium

Marcin Kalinowski
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Abstract

The deuteron charge radius is calculated from the measurement of the Lamb shift in muonic deuterium, taking into account the electron vacuum polarization correction to the nuclear-structure effects. This correction is unexpectedly large and gives a mean-square charge-radii difference $ r_d^2-r_p^2 = 3.81747(346)\, {\rm fm}^2 $, which is now consistent with that obtained from the ordinary H-D isotope shift in the 1$S$-2$S$ transition. This suggests that the long-standing discrepancy in the proton charge radius obtained from electronic and muonic systems is due to an underestimated uncertainty in ordinary hydrogen spectroscopy.

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Marcin Kalinowski. 2019-03-07. Deuteron charge radius from the Lamb-shift measurement in muonic deuterium. https://doi.org/10.1103/physreva.99.030501

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