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

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 $r_d^2-r_p^2=3.81747(346){\mathrm{fm}}^2$, 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.

arXiv commentMinor corrections to the text

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Cited by in corpus (8)

• The proton charge radius
• The proton structure in and out of muonic hydrogen
• Comprehensive theory of the Lamb shift in light muonic atoms
• Probing uncertainties of nuclear structure corrections in light muonic atoms
• Deuterium spectroscopy for enhanced bounds on physics beyond the Standard Model
• Two-photon exchange in (muonic) deuterium at N3LO in pionless effective field theory
• A reassessment of nuclear effects in muonic deuterium using pionless effective field theory at N3LO
• Frequency measurements of transitions from the $2^3{P}_2$ state to the $5^1{D}_2$, $5^3{S}_1$, and $5^{3}D$ states in ultracold helium