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Direct measurement of positronium hyperfine splitting — Testing fundamental physics with sub-THz gyrotron

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10 Author(s)
Miyazaki, A. ; Dept. of Phys., Univ. of Tokyo, Tokyo, Japan ; Yamazaki, T. ; Suehara, T. ; Namba, T.
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The direct transition from o-Ps to p-Ps was firstly observed, using a gyrotron, a mode-converter and a Fabry-Pérot cavity. The Einstein's A coefficient is measured as 3.9 (+1.8 -1.7) · 10-8 s-1. It is the first step to directly examine a reported discrepancy of positronium hyperfine splitting.

Published in:

Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on

Date of Conference:

2-7 Oct. 2011