Schulthess Ivo, Chanel Estelle, Fratangelo Anastasio, Gottstein Alexander, Gsponer Andreas, Hodge Zachary, Pistillo Ciro, Ries Dieter, Soldner Torsten, Thorne Jacob, Piegsa Florian M
Laboratory for High Energy Physics and Albert Einstein Center for Fundamental Physics, University of Bern, 3012 Bern, Switzerland.
Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France.
Phys Rev Lett. 2022 Nov 4;129(19):191801. doi: 10.1103/PhysRevLett.129.191801.
We report on a search for dark matter axionlike particles (ALPs) using a Ramsey-type apparatus for cold neutrons. A hypothetical ALP-gluon coupling would manifest in a neutron electric dipole moment signal oscillating in time. Twenty-four hours of data have been analyzed in a frequency range from 23 μHz to 1 kHz, and no significant oscillating signal has been found. The usage of present dark-matter models allows one to constrain the coupling of ALPs to gluons in the mass range from 10^{-19} to 4×10^{-12} eV. The best limit of C_{G}/f_{a}m_{a}=2.7×10^{13} GeV^{-2} (95% C.L.) is reached in the mass range from 2×10^{-17} to 2×10^{-14} eV.
我们报告了一项使用用于冷中子的拉姆齐型装置寻找暗物质类轴子粒子（ALP）的研究。假设的轴子 - 胶子耦合将表现为中子电偶极矩信号随时间振荡。在23 μHz至1 kHz的频率范围内分析了24小时的数据，未发现明显的振荡信号。利用当前的暗物质模型，可以在10⁻¹⁹至4×10⁻¹² eV的质量范围内限制轴子与胶子的耦合。在2×10⁻¹⁷至2×10⁻¹⁴ eV的质量范围内达到了C₉/fₐmₐ = 2.7×10¹³ GeV⁻²（95%置信水平）的最佳限制。
