TY - JOUR
T1 - The direct spectroscopy of positronium hyperfine structure using a sub-THz gyrotron
AU - Miyazaki, Akira
AU - Yamazaki, Takayuki
AU - Suehara, Taikan
AU - Namba, Toshio
AU - Asai, Shoji
AU - Kobayashi, Tomio
AU - Saito, Haruo
AU - Idehara, Toshitaka
AU - Ogawa, Isamu
AU - Tatematsu, Yoshinori
PY - 2014/1
Y1 - 2014/1
N2 - Positronium is an ideal system for research on Quantum Electrodynamics (QED), especially in a bound state. A discrepancy of 3.9 standard deviations has been found between the measured hyperfine structure (Ps-HFS) and the QED predictions. This may be due to the contribution of unknown new physics or common systematic effects in previous measurements, in all of which the Zeeman effect was used. We propose a new method to directly measure the Ps-HFS using a high power gyrotron. We compare two resonators which have been developed to supply sufficient power to drive the direct transition, a Fabry-Ṕerot resonator and a ring resonator with a diffraction grating. We plan to perform first direct measurement of Ps-HFS within the next six months.
AB - Positronium is an ideal system for research on Quantum Electrodynamics (QED), especially in a bound state. A discrepancy of 3.9 standard deviations has been found between the measured hyperfine structure (Ps-HFS) and the QED predictions. This may be due to the contribution of unknown new physics or common systematic effects in previous measurements, in all of which the Zeeman effect was used. We propose a new method to directly measure the Ps-HFS using a high power gyrotron. We compare two resonators which have been developed to supply sufficient power to drive the direct transition, a Fabry-Ṕerot resonator and a ring resonator with a diffraction grating. We plan to perform first direct measurement of Ps-HFS within the next six months.
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U2 - 10.1007/s10762-013-0001-8
DO - 10.1007/s10762-013-0001-8
M3 - Article
AN - SCOPUS:84899456127
SN - 1866-6892
VL - 35
SP - 91
EP - 100
JO - Journal of Infrared, Millimeter, and Terahertz Waves
JF - Journal of Infrared, Millimeter, and Terahertz Waves
IS - 1
ER -