Precise measurement of HFS of positronium

A. Ishida, G. Akimoto, K. Kato, Taikan 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 journalArticle

Abstract

The ground state hyperfine splitting in positronium, Δ HFS , is sensitive to high order corrections of QED. A new calculation up to O(α 3 ) 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 languageEnglish
Article number012004
JournalJournal of Physics: Conference Series
Volume199
DOIs
Publication statusPublished - Jan 1 2010

Fingerprint

positronium
systematic errors
ground state
predictions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ishida, A., Akimoto, G., Kato, K., Suehara, T., Namba, T., Asai, S., ... Idehara, T. (2010). Precise measurement of HFS of positronium. Journal of Physics: Conference Series, 199, [012004]. https://doi.org/10.1088/1742-6596/199/1/012004

Precise measurement of HFS of positronium. / Ishida, A.; Akimoto, G.; Kato, K.; Suehara, Taikan; Namba, T.; Asai, S.; Kobayashi, T.; Saito, H.; Yoshida, M.; Tanaka, K.; Yamamoto, A.; Ogawa, I.; Kobayashi, S.; Idehara, T.

In: Journal of Physics: Conference Series, Vol. 199, 012004, 01.01.2010.

Research output: Contribution to journalArticle

Ishida, A, Akimoto, G, Kato, K, Suehara, T, Namba, T, Asai, S, Kobayashi, T, Saito, H, Yoshida, M, Tanaka, K, Yamamoto, A, Ogawa, I, Kobayashi, S & Idehara, T 2010, 'Precise measurement of HFS of positronium', Journal of Physics: Conference Series, vol. 199, 012004. https://doi.org/10.1088/1742-6596/199/1/012004
Ishida, A. ; Akimoto, G. ; Kato, K. ; Suehara, Taikan ; Namba, T. ; Asai, S. ; Kobayashi, T. ; Saito, H. ; Yoshida, M. ; Tanaka, K. ; Yamamoto, A. ; Ogawa, I. ; Kobayashi, S. ; Idehara, T. / Precise measurement of HFS of positronium. In: Journal of Physics: Conference Series. 2010 ; Vol. 199.
@article{8003310a61964278a34b636e6e59414e,
title = "Precise measurement of HFS of positronium",
abstract = "The ground state hyperfine splitting in positronium, Δ HFS , is sensitive to high order corrections of QED. A new calculation up to O(α 3 ) 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.",
author = "A. Ishida and G. Akimoto and K. Kato and Taikan 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",
month = "1",
day = "1",
doi = "10.1088/1742-6596/199/1/012004",
language = "English",
volume = "199",
journal = "Journal of Physics: Conference Series",
issn = "1742-6588",
publisher = "IOP Publishing Ltd.",

}

TY - JOUR

T1 - Precise measurement of HFS of positronium

AU - Ishida, A.

AU - Akimoto, G.

AU - Kato, K.

AU - Suehara, Taikan

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 - 2010/1/1

Y1 - 2010/1/1

N2 - The ground state hyperfine splitting in positronium, Δ HFS , is sensitive to high order corrections of QED. A new calculation up to O(α 3 ) 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.

AB - The ground state hyperfine splitting in positronium, Δ HFS , is sensitive to high order corrections of QED. A new calculation up to O(α 3 ) 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.

UR - http://www.scopus.com/inward/record.url?scp=77950485544&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77950485544&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/199/1/012004

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

M3 - Article

VL - 199

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

M1 - 012004

ER -