ANAIS-112对横向等离激元产生的太阳轴子的首个实验限制
First Experimental Bounds on Transverse Plasmon Solar Axions with ANAIS-112
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中文总结 AI 辅助
ANAIS-112利用625.75 kg×年曝光量，首次对横向等离激元产生的太阳轴子设置实验限制，扩展了其在35-280 eV质量区的灵敏度。
中文摘要 AI 辅助
太阳轴子类粒子（ALPs）可通过太阳内部磁场中横向等离激元的转换共振产生，这一产生机制是常规Primakoff过程的补充。本文报告了对通过该机制产生的太阳ALPs的首个实验搜寻，使用ANAIS-112的625.75 kg×年曝光量，假设通过探测器中的逆Primakoff转换进行探测，搜寻由日地距离变化引起的通量周年调制。在1至20 keV的1 keV能段拟合的调制振幅与无调制的情况一致，首次得出包含共振横向等离激元通量的轴子-光子耦合限制：在轴子质量ma≈150 eV时，gaγ<1.32×10^-9 GeV^-1（90%置信水平）。这一此前未被探索的产生通道扩展了ANAIS-112在35至280 eV质量范围内的灵敏度，在该质量区间，根据预期的太阳磁场模型，横向等离激元通量比Primakoff通量高出最多两个数量级。
英文摘要
Solar axion-like particles (ALPs) can be resonantly produced through the conversion of transverse plasmons in the magnetic field of the solar interior, introducing a production mechanism complementary to the conventional Primakoff process. In this Letter, we report the first experimental search for solar ALPs produced through this mechanism. Using an exposure of 625.75 kg$\times$yr from ANAIS-112, we search for the annual modulation of the flux induced by the variation of the Earth--Sun distance, assuming detection through inverse Primakoff conversion in the detector. Modulation amplitudes fitted in 1 keV bins between 1--20 keV are consistent with the absence of modulation, yielding the first constraints on the axion--photon coupling that include the resonant transverse-plasmon flux, $g_{aγ} < 1.32\times 10^{-9} \mathrm{GeV}^{-1}$ (90\% C.L.) at $m_a \simeq 150$ eV. This previously unexplored production channel extends the sensitivity of ANAIS-112 in the mass range 35--280 eV, where, for the expected solar magnetic-field models, the transverse-plasmon flux exceeds the Primakoff flux by up to two orders of magnitude.
