Speaker
Claudio Lenz Cesar
(Univ. Federal do Rio de Janeiro (BR))
Description
The Charge-Parity-Time (CPT) symmetry predicts a perfect matching between an atom's and the antiatom's quantum structure. Following the production and trapping of antihydrogen $(\rm\overline H)$ atoms in experiments at CERN's Antiproton Decelerator (AD), it is now possible to attempt a high-precision comparison of the spectra of H and $\rm\overline H$. There are interests in the hyperfine structure, in the two-photon 1s-2s transition and in the Lyman-$\alpha$ 1s-2p transition for detection and cooling. In this contribution I mostly discuss the 1s-2s spectroscopy. I review results with hydrogen and the future prospects for precisions beyond parts in 10$^{15}$. I discuss a detection method for the initial spectroscopy in the ALPHA experiment. I also discuss a new cold hydrogen beam setup developed in Rio for a direct comparison of the two conjugate species, as well as a possibility to integrate both species in the same trapping environment.
Author
Claudio Lenz Cesar
(Univ. Federal do Rio de Janeiro (BR))
