Precise measurement of Hyper Fine Structure of positronium using sub-THz light

Details Precise measurement of Hyper Fine Structure of positronium using sub-THz light Precise measurement of Hyper Fine Structure of positronium using sub-THz light

2010-03-23

arxiv.org/abs/1003.4324v2

Physics

High Energy Physics

High Energy Physics - Experiment

contributed to "The 3rd International Workshop on Far-Infrared Technologies 2010 (U.Fukui)"

Scientific paper

Positronium is an ideal system for the research of the QED, especially for the QED in bound state. The discrepancy of 3.9\sigma is found recently between the measured HFS values and the QED prediction ($O(\alpha^3)$). It might be due to the contribution of the unknown new physics or the systematic problems in the previous all measurements. We propose new method to measure HFS precisely and directly. A gyrotron, a novel sub-THz light source is used with a high-finesse Fabry-P\'erot cavity to obtain enough radiation power at 203 GHz. The present status of the optimization studies and current design of the experiment are described.

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