Direct measurement of positronium hyperfine structure: ̃ A new horizon of precision spectroscopy using gyrotrons

Shoji Asai, Takayuki Yamazaki, Akira Miyazaki, Taikan Suehara, Toshio Namba, Tomio Kobayashi, Haruhiko Saito, Takatoshi Idehara, Isamu Ogawa, S. Sabchevski

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Positronium is an ideal system for research on QED, especially in a bound state. A discrepancy (3.9s) is found recently between measured HFS values and the QED prediction (including up-to O(α 3 log α -1), where a is the fine-structure constant.). It might be due to a contribution of unknown new physics or common systematic problems in all the previous measurements. A new method to measure HFS directly is performed using a high power gyrotron. The transition from ortho-positronium to para-positronium has been observed with 5 σ CL, which is the first observation of M1 transition in (sub)Terahertz region. New technologies of high power gyrotrons are developed for precision spectroscopy.

本文言語English
ページ(範囲)766-776
ページ数11
ジャーナルJournal of Infrared, Millimeter, and Terahertz Waves
33
7
DOI
出版ステータスPublished - 2012 7月
外部発表はい

ASJC Scopus subject areas

  • 放射線
  • 器械工学
  • 凝縮系物理学
  • 電子工学および電気工学

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