Speaker
Description
We discuss, on behalf of the ALPHA collaboration, studies of some systematic effects on the 1S-2S spectroscopy on trapped and laser-cooled antihydrogen atoms through the use of a quasi-analytical lineshape [1]. This work is part of the preparation of a manuscript soon to be submitted by the ALPHA collaboration that should significantly improve the measurement of this transition frequency over the previous measurement[2] at 2 parts in $10^{12}$. We also discuss future prospects for a direct comparison between trapped samples of hydrogen and antihydrogen[3].
[1] Levi O. A. Azevedo and Claudio Lenz Cesar, Quasianalytical line shape for the 1𝑆−2𝑆 laser spectroscopy of antihydrogen and hydrogen, Phys. Rev. A 111, 012807 (2025); https://doi.org/10.1103/PhysRevA.111.012807
[2] M. Ahmadi, B. X. R. Alves, et al., [ALPHA Collab.], Characterization of the 1S–2S transition in antihydrogen, Nature volume 557, pages 71–75 (2018); https://www.nature.com/articles/s41586-018-0017-2
[3] C. L. Cesar, A sensitive detection method for high resolution spectroscopy of trapped antihydrogen, hydrogen and other trapped species, J. Phys. B: At., Mol. Opt. Phys. 49, 074001 (2016); https://iopscience.iop.org/article/10.1088/0953-4075/49/7/074001