Precise measurement of HFS of positronium

A. Ishida; G. Akimoto; K. Kato; T. Suehara; T. Namba; S. Asai; T. Kobayashi; H. Saito; M. Yoshida; K. Tanaka; A. Yamamoto; I. Ogawa; S. Kobayashi; T. Idehara

doi:10.1088/1742-6596/199/1/012004

Precise measurement of HFS of positronium

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

Research output: Contribution to journal › Article › peer-review

Abstract

The ground state hyperfine splitting in 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 preliminary result of Δ_HFS 203.3990.029 GHz (143 ppm) has been obtained. A measurement with a precision of O(1) ppm is expected within a few years.

Original language	English
Article number	012004
Journal	Journal of Physics: Conference Series
Volume	199
DOIs	https://doi.org/10.1088/1742-6596/199/1/012004
Publication status	Published - 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1088/1742-6596/199/1/012004

Cite this

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title = "Precise measurement of HFS of positronium",

abstract = "The ground state hyperfine splitting in 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 preliminary result of ΔHFS 203.3990.029 GHz (143 ppm) has been obtained. A measurement with a precision of O(1) ppm is expected within a few years.",

author = "A. Ishida and G. Akimoto 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 I. Ogawa and S. Kobayashi and T. Idehara",

year = "2010",

doi = "10.1088/1742-6596/199/1/012004",

language = "English",

volume = "199",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

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TY - JOUR

T1 - Precise measurement of HFS of positronium

AU - Ishida, A.

AU - Akimoto, G.

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 - Ogawa, I.

AU - Kobayashi, S.

AU - Idehara, T.

PY - 2010

Y1 - 2010

N2 - The ground state hyperfine splitting in 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 preliminary result of ΔHFS 203.3990.029 GHz (143 ppm) has been obtained. A measurement with a precision of O(1) ppm is expected within a few years.

AB - The ground state hyperfine splitting in 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 preliminary result of ΔHFS 203.3990.029 GHz (143 ppm) has been obtained. A measurement with a precision of O(1) ppm is expected within a few years.

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DO - 10.1088/1742-6596/199/1/012004

M3 - Article

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SN - 1742-6588

VL - 199

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

M1 - 012004

ER -

Precise measurement of HFS of positronium

Abstract

All Science Journal Classification (ASJC) codes

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