Precise measurement of HFS of positronium using Zeeman effect

A. Ishida, G. Akimoto, Y. Sasaki, A. Miyazaki, K. Kato, T. Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, M. Yoshida, K. Tanaka, A. Yamamoto, Y. Urushizaki, I. Ogawa, T. Idehara, S. Sabchevski

研究成果: Article査読

1 被引用数 (Scopus)


The ground state hyperfine splitting of positronium, ΔHFS, is sensitive to high order corrections of QED. A new calculation up to O(α3) has revealed a 3.9 σ discrepancy between the QED prediction and the experimental results. This discrepancy might either be due to systematic problems in the previous experiments or to contributions beyond the Standard Model. We propose an experiment to measure ΔHFS employing new methods designed to remedy the systematic errors which may have affected the previous experiments. Our experiment will provide an independent check of the discrepancy. The measurement is in progress and a result of ΔHFS 203.385 0.011 GHz (58ppm) has been obtained from the prototype run. A measurement with a precision of O(ppm) is expected within a few years.

ジャーナルJournal of Physics: Conference Series
出版ステータスPublished - 2010

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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