The sub-THz direct spectroscopy of positronium hyperfine splitting

A. Miyazaki, T. Yamazaki, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, Y. Tatematsu, I. Ogawa, T. Idehara

Research output: Contribution to journalConference articlepeer-review

Abstract

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.

Original languageEnglish
Article number012002
JournalJournal of Physics: Conference Series
Volume443
Issue number1
DOIs
Publication statusPublished - 2013
Event16th International Conference on Positron Annihilation, ICPA 2012 - Bristol, United Kingdom
Duration: 2012 Aug 192012 Aug 24

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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