Authors:	Lensky, Vadim Hagelstein, Franziska Pascalutsa, Vladimir
Title:	A reassessment of nuclear effects in muonic deuterium using pionless effective field theory at N3LO
Online publication date:	17-Apr-2023
Year of first publication:	2022
Language:	english
Abstract:	We provide a systematic assessment of the order-α5 nuclear contributions to the Lamb shift of muonic deuterium, including the accompanying radiative corrections due to vacuum polarisation, up to nextto-next-to-next-to-leading order (N3LO) within the pionless effective field theory (π/ EFT). We also evaluate higher-order corrections due to the single-nucleon structure, which are expected to be the most important corrections beyond N3LO. We find a correlation between the deuteron charge and Friar radii, which can be useful to judge the quality of charge form factor parametrisations. We refine the theoretical description of the 2γ -exchange contribution, especially in the elastic contribution and the radiative corrections, ameliorating the original discrepancy between theory and experiment in the size of 2γ -exchange effects. Based on the experimental Lamb shift of muonic deuterium, we obtain the deuteron charge radius, rd(μD) = 2.12763(13)exp(77)theory fm, which is consistent with (but less precise than) the value obtained by combining the H-D isotope shift with the muonic-hydrogen Lamb shift. The theory uncertainty is evaluated using a Bayesian procedure and is dominated by the truncation of the π/ EFT series.
DDC:	530 Physik 530 Physics
Institution:	Johannes Gutenberg-Universität Mainz
Department:	FB 08 Physik, Mathematik u. Informatik
Place:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-8916
Version:	Published version
Publication type:	Zeitschriftenaufsatz
Document type specification:	Scientific article
License:	CC BY
Information on rights of use:	https://creativecommons.org/licenses/by/4.0/
Journal:	Physics letters : B 835
Pages or article number:	137500
Publisher:	Elsevier
Publisher place:	Amsterdam
Issue date:	2022
ISSN:	1873-2445
Publisher DOI:	10.1016/j.physletb.2022.137500
Appears in collections:	DFG-491381577-D