30 July 2023 to 4 August 2023
Alte Mensa
Europe/Berlin timezone

Nuclear structure effects in the Lamb shift of muonic deuterium in pionless effective field theory

3 Aug 2023, 14:55
15m
Atrium Maximum (Alte Mensa)

Atrium Maximum

Alte Mensa

Speaker

Dr Vadim Lensky (JGU Mainz)

Description

In this presentation, I will discuss the results for the O(α5) effects of the nuclear structure, the two-photon-exchange (TPE) corrections, in the energies of S-levels in muonic (μD) and ordinary (D) deuterium. They were recently obtained at next-to-next-to-next-to-leading order (N3LO) in the pionless effective field theory (EFT). At this order, there is a single low-energy constant that is fitted to the hydrogen-deuterium isotope shift. This constant generates a correlation between the deuteron charge and Friar radii. This correlation can be used to judge how well a deuteron charge form factor parametrization describes the low-virtuality properties of the deuteron. The pionless EFT evaluation of the TPE corrections in μD and D allows one to extract the deuteron charge radius rd from the μD Lamb shift, the 2S1S transition in D, and the 2S1S hydrogen–deuterium isotope shift in a unified approach, giving values of rd that are in agreement [1,2]. I will also discuss the role of the TPE corrections generated by the structure of the individual nucleons.

[1] V. Lensky, F. Hagelstein and V. Pascalutsa, Eur. Phys. J. A 58 (2022), 224 [arXiv:2206.14756 [nucl-th]].
[2] V. Lensky, F. Hagelstein and V. Pascalutsa, Phys. Lett. B 835 (2022), 137500 [arXiv:2206.14066 [nucl-th]].

Primary authors

Dr Vadim Lensky (JGU Mainz) Dr Franziska Hagelstein (JGU Mainz, PSI Villigen) Vladimir Pascalutsa (JGU Mainz)

Presentation materials