The first direct measurement of the hyperfine splitting in positronium

T. Suehara; A. Ishida; T. Namba; S. Asai; T. Kobayashi; H. Saitot; M. Yoshida; T. Idehara; I. Ogawa; S. Kobayashi; S. Sabchevski

doi:10.1088/1742-6596/194/15/152010

The first direct measurement of the hyperfine splitting in positronium

T. Suehara, A. Ishida, T. Namba, S. Asai, T. Kobayashi, H. Saitot, M. Yoshida, T. Idehara, I. Ogawa, S. Kobayashi, S. Sabchevski

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

Positronium is an ideal system for the research of the QED. The hyperfine splitting of positronium (Ps-HFS) is sensitive to the new physics beyond the Standard Model via a vacuum oscillation. Previous experimental results of the Ps-HFS show 3.5 σ discrepancy from the QED calculation, and it might be caused by uncertainties of the indirect method with static magnetic field and a few GHz RF. We developed a new direct measurement system of the Ps-HFS without static magnetic field, using a sub-THz gyrotron and a quasi-optical Fabry-Perot cavity. Status (hopefully the first result) of the direct positronium hyperfine transition observation will be presented.

Original language	English
Article number	152010
Journal	Journal of Physics: Conference Series
Volume	194
Issue number	15
DOIs	https://doi.org/10.1088/1742-6596/194/15/152010
Publication status	Published - Dec 24 2009
Externally published	Yes
Event	26th International Conference on Photonic, Electronic and Atomic Collisions - Kalamazoo, United States Duration: Jul 22 2009 → Jul 28 2009

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1088/1742-6596/194/15/152010

Cite this

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title = "The first direct measurement of the hyperfine splitting in positronium",

abstract = "Positronium is an ideal system for the research of the QED. The hyperfine splitting of positronium (Ps-HFS) is sensitive to the new physics beyond the Standard Model via a vacuum oscillation. Previous experimental results of the Ps-HFS show 3.5 σ discrepancy from the QED calculation, and it might be caused by uncertainties of the indirect method with static magnetic field and a few GHz RF. We developed a new direct measurement system of the Ps-HFS without static magnetic field, using a sub-THz gyrotron and a quasi-optical Fabry-Perot cavity. Status (hopefully the first result) of the direct positronium hyperfine transition observation will be presented.",

author = "T. Suehara and A. Ishida and T. Namba and S. Asai and T. Kobayashi and H. Saitot and M. Yoshida and T. Idehara and I. Ogawa and S. Kobayashi and S. Sabchevski",

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T1 - The first direct measurement of the hyperfine splitting in positronium

AU - Suehara, T.

AU - Ishida, A.

AU - Namba, T.

AU - Asai, S.

AU - Kobayashi, T.

AU - Saitot, H.

AU - Yoshida, M.

AU - Idehara, T.

AU - Ogawa, I.

AU - Kobayashi, S.

AU - Sabchevski, S.

PY - 2009/12/24

Y1 - 2009/12/24

N2 - Positronium is an ideal system for the research of the QED. The hyperfine splitting of positronium (Ps-HFS) is sensitive to the new physics beyond the Standard Model via a vacuum oscillation. Previous experimental results of the Ps-HFS show 3.5 σ discrepancy from the QED calculation, and it might be caused by uncertainties of the indirect method with static magnetic field and a few GHz RF. We developed a new direct measurement system of the Ps-HFS without static magnetic field, using a sub-THz gyrotron and a quasi-optical Fabry-Perot cavity. Status (hopefully the first result) of the direct positronium hyperfine transition observation will be presented.

AB - Positronium is an ideal system for the research of the QED. The hyperfine splitting of positronium (Ps-HFS) is sensitive to the new physics beyond the Standard Model via a vacuum oscillation. Previous experimental results of the Ps-HFS show 3.5 σ discrepancy from the QED calculation, and it might be caused by uncertainties of the indirect method with static magnetic field and a few GHz RF. We developed a new direct measurement system of the Ps-HFS without static magnetic field, using a sub-THz gyrotron and a quasi-optical Fabry-Perot cavity. Status (hopefully the first result) of the direct positronium hyperfine transition observation will be presented.

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JO - Journal of Physics: Conference Series

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T2 - 26th International Conference on Photonic, Electronic and Atomic Collisions

Y2 - 22 July 2009 through 28 July 2009

ER -

The first direct measurement of the hyperfine splitting in positronium

Abstract

All Science Journal Classification (ASJC) codes

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