Antihydrogen studies in ALPHA

7th International Conference on Beauty, Charm, and Hyperons in Hadronic Interactions

Madsen, N.^1

Department of Physics, College of Science, Swansea University, Swansea

SA2 8PP, United Kingdom^1

关键词: Atomic transition;    Charge neutrality;    Direct measurement;    Gravitational forces;    Matter and antimatters;    Spectroscopic studies;    Stochastic heating;    Two-photon transitions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/770/1/012021/pdf
DOI  :  10.1088/1742-6596/770/1/012021

来源: IOP

【 摘 要 】

The ALPHA experiment studies antihydrogen as a means to investigate the symmetry of matter and antimatter. Spectroscopic studies of the anti-atom hold the promise of the most precise direct comparisons of matter and antimatter possible. ALPHA was the first to trap antihydrogen in a magnetic trap, allowing the first ever detection of atomic transitions in an anti-atom. More recently, through stochastic heating, we have also been able to put a new limit on the charge neutrality of antihydrogen. ALPHA is currently preparing to perform the first laser-spectroscopy of antihydrogen, hoping to excite the 2s state using a two-photon transition from the 1s state. We discuss the recent results as well as the key developments that led to these successes and discuss how we are preparing to perform the first laser-spectroscopy. We will also discuss plans to use our novel technique for gravitational tests on antihydrogen for a direct measurement of the sign of the gravitational force on antihydrogen.