630 nm处与轴子相关的连续偏振信号的一个弱上限
A weak upper limit for axion-related continuum polarization signal at 630 nm
摘要：
轴子可能是暗物质的一个组成部分，对粒子物理学有着极大的兴趣。如果存在的话，它们与太阳光球层中磁场的相互作用应该会产生实光子的偏振信号，其振幅与磁场强度成二次方关系。我在630 nm附近的可见光波长范围内寻找轴子引起的低能偏振信号的可能痕迹。我用一个太阳黑子和附近活动区的观测来研究连续极化信号对磁场强度的依赖性。我纠正了连续偏振信号的偏振引入的望远镜由于倾斜反射。我重现校正偏振光谱使用光谱合成的太阳模型大气，包括塞曼效应。这些合成光谱用作来自已知源的偏振量的参考。我没有发现一个增强的偏振信号的痕迹，在连续偏振以上的偏振水平约0.05%的I_c。我提供了一个弱上限的存在和相互作用的轴子与太阳磁场提出任何模型的太阳轴子产生和相互作用不应导致偏振效应以上的连续强度的0. 05%在波长为630纳米，即，由于轴子相关过程，10000个光子中不超过5个应该显示偏振。使用光子和轴子通量率的估计，我推导出一个上限为$g_{aγ} < 700*10^{-10}$ GeV $^{-1}$的轴子-光子耦合常数$g_{aγ}$。
英文摘要：
Axions could be a component of the dark matter and are of great interest for particle physics. If present, their interaction with magnetic fields in the solar photosphere should produce a polarization signal of real photons, whose amplitude depends quadratically on the magnetic field strength. I search for possible traces of axion-induced low-energy polarization signal in the visible wavelength range near 630 nm. I use an observation of a sunspot and the nearby active region to study the dependence of the continuum polarization signal on magnetic field strength. I correct the continuum polarization signal for the polarization introduced by the telescope due to oblique reflections. I reproduce the corrected polarization spectra using a spectral synthesis of solar model atmospheres that include the Zeeman effect. These synthetic spectra serve as a reference for the amount of polarization from a known source. I find no trace of an enhanced polarization signal in continuum polarization above a polarization level of around 0.05 % of I_c. I provide a weak upper limit for the existence and interaction of axions with solar magnetic fields by proposing that any model of solar axion generation and interaction should not lead to polarization effects above 0.05 % of the continuum intensity at a wavelength of 630 nm, i.e., not more than 5 out of 10000 photons should show polarization due to axion-related processes. Using estimates of photon and axion flux rates, I derive an upper limit of $g_{aγ} < 700*10^{-10}$ GeV$^{-1}$ for the axion-photon coupling constant $g_{aγ}$.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
