Probing the energy structure of positronium with a 203 GHz Fabry-Perot Cavity

T. Suehara, A. Miyazaki, A. Ishida, T. Namba, S. Asai, T. Kobayashi, H. Saito, M. Yoshida, T. Idehara, I. Ogawa, S. Kobayashi, Y. Urushizaki, S. Sabchevski

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Positronium is an ideal system for the research of the bound state QED. The hyperfine splitting of positronium (Ps-HFS: about 203 GHz) is sensitive to new physics beyond the Standard Model via a vacuum oscillation between an ortho-Ps and a virtual photon. Previous experimental results of the Ps-HFS show 3.9 σ (15 ppm) discrepancy from the QED calculation. All previous experiments used an indirect method with static magnetic field to cause Zeeman splitting (a few GHz) between triplet states of ortho-Ps, from which the HFS value was derived. One possible systematic error source of the indirect method is the static magnetic field. We are developing a new direct measurement system of the Ps-HFS without static magnetic field. In this measurement we use a gyrotron, a novel sub-THz light source, with a high-finesse Fabry-Perot cavity to obtain enough radiation power at 203 GHz. The present status of the optimization studies and current design of the experiment are described.

Original languageEnglish
Article number012002
JournalJournal of Physics: Conference Series
Volume199
DOIs
Publication statusPublished - Jan 1 2010
Externally publishedYes

Fingerprint

positronium
cavities
magnetic fields
systematic errors
atomic energy levels
energy
light sources
vacuum
oscillations
physics
optimization
causes
photons
radiation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Probing the energy structure of positronium with a 203 GHz Fabry-Perot Cavity. / Suehara, T.; Miyazaki, A.; Ishida, A.; Namba, T.; Asai, S.; Kobayashi, T.; Saito, H.; Yoshida, M.; Idehara, T.; Ogawa, I.; Kobayashi, S.; Urushizaki, Y.; Sabchevski, S.

In: Journal of Physics: Conference Series, Vol. 199, 012002, 01.01.2010.

Research output: Contribution to journalArticle

Suehara, T, Miyazaki, A, Ishida, A, Namba, T, Asai, S, Kobayashi, T, Saito, H, Yoshida, M, Idehara, T, Ogawa, I, Kobayashi, S, Urushizaki, Y & Sabchevski, S 2010, 'Probing the energy structure of positronium with a 203 GHz Fabry-Perot Cavity', Journal of Physics: Conference Series, vol. 199, 012002. https://doi.org/10.1088/1742-6596/199/1/012002
Suehara, T. ; Miyazaki, A. ; Ishida, A. ; Namba, T. ; Asai, S. ; Kobayashi, T. ; Saito, H. ; Yoshida, M. ; Idehara, T. ; Ogawa, I. ; Kobayashi, S. ; Urushizaki, Y. ; Sabchevski, S. / Probing the energy structure of positronium with a 203 GHz Fabry-Perot Cavity. In: Journal of Physics: Conference Series. 2010 ; Vol. 199.
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