Arnquist I J, Avignone F T, Barabash A S, Barton C J, Bhimani K H, Blalock E, Bos B, Busch M, Buuck M, Caldwell T S, Chan Y-D, Christofferson C D, Chu P-H, Clark M L, Cuesta C, Detwiler J A, Efremenko Yu, Ejiri H, Elliott S R, Giovanetti G K, Green M P, Gruszko J, Guinn I S, Guiseppe V E, Haufe C R, Henning R, Hervas Aguilar D, Hoppe E W, Hostiuc A, Kidd M F, Kim I, Kouzes R T, Lannen V T E, Li A, Lopez A M, López-Castaño J M, Martin E L, Martin R D, Massarczyk R, Meijer S J, Oli T K, Othman G, Paudel L S, Pettus W, Poon A W P, Radford D C, Reine A L, Rielage K, Ruof N W, Schaper D C, Tedeschi D, Varner R L, Vasilyev S, Wilkerson J F, Wiseman C, Xu W, Yu C-H, Zhu B X
Pacific Northwest National Laboratory, Richland, Washington 99354, USA.
Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA.
Phys Rev Lett. 2022 Aug 19;129(8):081803. doi: 10.1103/PhysRevLett.129.081803.
Axions were originally proposed to explain the strong-CP problem in QCD. Through axion-photon coupling, the Sun could be a major source of axions, which could be measured in solid state detection experiments with enhancements due to coherent Primakoff-Bragg scattering. The Majorana Demonstrator experiment has searched for solar axions with a set of ^{76}Ge-enriched high purity germanium detectors using a 33 kg-yr exposure collected between January, 2017 and November, 2019. A temporal-energy analysis gives a new limit on the axion-photon coupling as g_{aγ}<1.45×10^{-9} GeV^{-1} (95% confidence level) for axions with mass up to 100 eV/c^{2}. This improves laboratory-based limits between about 1 eV/c^{2} and 100 eV/c^{2}.
轴子最初是为了解释量子色动力学中的强CP问题而提出的。通过轴子-光子耦合，太阳可能是轴子的主要来源，这可以在固态探测实验中进行测量，由于相干普里马科夫-布拉格散射而得到增强。马约拉纳演示器实验使用一组富集了76锗的高纯度锗探测器，在2017年1月至2019年11月期间收集了33千克·年的曝光量，对太阳轴子进行了搜索。时间-能量分析给出了轴子-光子耦合的新限制，对于质量高达100电子伏特/c²的轴子，g_{aγ}<1.45×10^{-9} GeV^{-1}（95%置信水平）。这改进了基于实验室的约1电子伏特/c²至100电子伏特/c²之间的限制。
