Volume 353 -
International Conference on Precision Physics and Fundamental Physical Constants
(FFK2019) -
Session 1: Precision spectroscopy of atoms and ions
Calculation of higher order corrections to positronium energy levels
Full text:
pdf
Pre-published on:
October 15, 2019
Published on:
February 18, 2020
Abstract
We report on progress in the calculation of corrections to positronium energy levels of order $m \alpha^7$. Corrections at this level will be needed for the interpretation of the results of upcoming measurements. A procedure for the calculation of high order corrections has been developed based on the Bethe-Salpeter equation of dimensionally regularized NRQED and the method of regions. We demonstrate the effectiveness of this approach by using it to obtain all pure recoil corrections to positronium energies at $O(m \alpha^6)$ in a unified manner.
DOI: https://doi.org/10.22323/1.353.0004
How to cite
Metadata are provided both in article format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in proceeding format which is more detailed and complete.
Open Access
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.