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

doi:10.1088/1742-6596/225/1/012019

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

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Abstract

The ground state hyperfine splitting of positronium, Δ_HFS, 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 Δ_HFS 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 Δ_HFS 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.

Original language	English
Article number	012019
Journal	Journal of Physics: Conference Series
Volume	225
DOIs	https://doi.org/10.1088/1742-6596/225/1/012019
Publication status	Published - 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1088/1742-6596/225/1/012019

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Ishida, A., Akimoto, G., Sasaki, Y., Miyazaki, A., Kato, K., Suehara, T., Namba, T., Asai, S., Kobayashi, T., Saito, H., Yoshida, M., Tanaka, K., Yamamoto, A., Urushizaki, Y., Ogawa, I., Idehara, T., & Sabchevski, S. (2010). Precise measurement of HFS of positronium using Zeeman effect. Journal of Physics: Conference Series, 225, Article 012019. https://doi.org/10.1088/1742-6596/225/1/012019

Ishida, A, Akimoto, G, Sasaki, Y, Miyazaki, A, Kato, K, Suehara, T, Namba, T, Asai, S, Kobayashi, T, Saito, H, Yoshida, M, Tanaka, K, Yamamoto, A, Urushizaki, Y, Ogawa, I, Idehara, T & Sabchevski, S 2010, 'Precise measurement of HFS of positronium using Zeeman effect', Journal of Physics: Conference Series, vol. 225, 012019. https://doi.org/10.1088/1742-6596/225/1/012019

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title = "Precise measurement of HFS of positronium using Zeeman effect",

abstract = "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.",

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

year = "2010",

doi = "10.1088/1742-6596/225/1/012019",

language = "English",

volume = "225",

journal = "Journal of Physics: Conference Series",

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TY - JOUR

T1 - Precise measurement of HFS of positronium using Zeeman effect

AU - Ishida, A.

AU - Akimoto, G.

AU - Sasaki, Y.

AU - Miyazaki, A.

AU - Kato, K.

AU - Suehara, T.

AU - Namba, T.

AU - Asai, S.

AU - Kobayashi, T.

AU - Saito, H.

AU - Yoshida, M.

AU - Tanaka, K.

AU - Yamamoto, A.

AU - Urushizaki, Y.

AU - Ogawa, I.

AU - Idehara, T.

AU - Sabchevski, S.

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

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DO - 10.1088/1742-6596/225/1/012019

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SN - 1742-6588

VL - 225

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

M1 - 012019

ER -

Precise measurement of HFS of positronium using Zeeman effect

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