TY - JOUR
T1 - The sub-THz direct spectroscopy of positronium hyperfine splitting
AU - Miyazaki, A.
AU - Yamazaki, T.
AU - Suehara, T.
AU - Namba, T.
AU - Asai, S.
AU - Kobayashi, T.
AU - Saito, H.
AU - Tatematsu, Y.
AU - Ogawa, I.
AU - Idehara, T.
PY - 2013
Y1 - 2013
N2 - The positronium hyperfine splitting is a good target to study Quantum Electrodynamics in the bound state. There is a discrepancy between precision measurements and a theoretical calculation. We are planning to directly measure the positroinum hyperfine structure for the first time. A gyrotron oscillator is used as a novel radiation source in terahertz region. A Fabry-Pérot resonator is also developed to increase photon density. We have already observed the direct transition at 202.9 GHz. The direct measurement of the order of 100 ppm will be performed within about a year.
AB - The positronium hyperfine splitting is a good target to study Quantum Electrodynamics in the bound state. There is a discrepancy between precision measurements and a theoretical calculation. We are planning to directly measure the positroinum hyperfine structure for the first time. A gyrotron oscillator is used as a novel radiation source in terahertz region. A Fabry-Pérot resonator is also developed to increase photon density. We have already observed the direct transition at 202.9 GHz. The direct measurement of the order of 100 ppm will be performed within about a year.
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U2 - 10.1088/1742-6596/443/1/012002
DO - 10.1088/1742-6596/443/1/012002
M3 - Conference article
AN - SCOPUS:84881041559
VL - 443
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012002
T2 - 16th International Conference on Positron Annihilation, ICPA 2012
Y2 - 19 August 2012 through 24 August 2012
ER -