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PhysRevX.12.021033.pdf | 1.81 MB | Adobe PDF | 見る/開く |
タイトル: | Observation of Nonlinearity of Generalized King Plot in the Search for New Boson |
著者: | Ono, Koki https://orcid.org/0000-0002-1145-0424 (unconfirmed) Saito, Yugo Ishiyama, Taiki Higomoto, Toshiya Takano, Tetsushi Takasu, Yosuke https://orcid.org/0000-0001-7458-8933 (unconfirmed) Yamamoto, Yasuhiro Tanaka, Minoru Takahashi, Yoshiro https://orcid.org/0000-0001-7607-7387 (unconfirmed) |
著者名の別形: | 小野, 滉貴 齋藤, 優冴 石山, 泰樹 肥後本, 隼也 高野, 哲至 高須, 洋介 山本, 康裕 田中, 実 高橋, 義朗 |
キーワード: | Electronic structure of atoms & molecules Electronic transitions Hypothetical particle physics models Nuclear charge distribution Atoms Hypothetical particles Precision measurements Spectroscopy Atomic, Molecular & Optical Particles & Fields |
発行日: | Apr-2022 |
出版者: | American Physical Society (APS) |
誌名: | Physical Review X |
巻: | 12 |
号: | 2 |
論文番号: | 021033 |
抄録: | We measure isotope shifts for neutral Yb isotopes on an ultranarrow optical clock transition ¹S₀ - ³P₀ with an accuracy of a few hertz. Combined with one of the recently reported isotope-shift measurements of Yb⁺ on two optical transitions, the result allows us to construct the King plots --a set of scaled isotope shifts data on two different optical transitions plotted in two-dimensional plane. When only the leading-order terms of isotope shifts are taken into account, a King plot should exhibit a linear relation as a result of elimination of the leading nuclear-size dependence. Extremely large nonlinearity unexplainable by a quadratic field shift is revealed, which was proposed previously as a source of the observed nonlinearity of the King plot. We further construct the generalized King plot with three optical transitions so that we can eliminate the contribution arising from a higher-order effect within the standard model. Our analysis of the generalized King plot shows a deviation from linearity at the 3σ level, indicating that there exist at least two higher-order contributions in the measured isotope shifts. Under reasonable assumptions, we obtain the upper bound of the product of the couplings for a new boson, mediating a force between electrons and neutrons --|yeyn|/(ℏc)<1×10⁻¹⁰ for the mass less than 1 keV-- with the 95% confidence level, providing an important step toward probing new physics via isotope-shift spectroscopy. |
記述: | 新粒子探索のための量子センサー --原子スペクトルの精密分光から基礎物理法則に迫る--. 京都大学プレスリリース. 2022-05-12. |
著作権等: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. |
URI: | http://hdl.handle.net/2433/270000 |
DOI(出版社版): | 10.1103/PhysRevX.12.021033 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2022-05-12 |
出現コレクション: | 学術雑誌掲載論文等 |
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