利用XMM-Newton空白天观测搜寻太阳-轴子类粒子衰变
Searching for Solar-Basin Axionlike-Particle Decay with XMM-Newton Blank-Sky Observations
浏览论文内容
中文总结 AI 辅助
本研究提出利用XMM-Newton空白天观测堆叠谱，搜寻太阳引力场中轴子类粒子衰变的策略，在1.4–16 keV质量范围得到相关耦合常数限制，为后续搜寻提供可扩展分析框架。
中文摘要 AI 辅助
束缚于太阳引力场中的轴子类粒子（ALP）形成所谓的ALP太阳-盆地。由于非相对论粒子的双光子衰变近似各向同性，可通过对日反方向的观测搜寻这类粒子。本研究提出一种利用XMM-Newton空白天观测（XMM-BSOs）堆叠谱数据，从太阳-盆地搜寻窄衰变线信号的策略；通过联合拟合信号与本底模型，在$m_a=1.4$–16 keV的质量范围内得到$g_{a\u03b3\u03b7}^{95}$的限制，典型灵敏度为$g_{a\u03b3\u03b7}\sim10^{-10}$–$10^{-11}$ GeV⁻¹。研究完成了首次针对太阳-盆地的对日反方向搜寻，证明该策略可利用大量X射线观测的堆叠曝光度，为后续搜寻提供可扩展的分析框架。
英文摘要
Axion-like particles (ALPs) bound in the solar gravitational field form the so-called ALP solar-basin. Since the two-photon decay of non-relativistic particles is approximately isotropic, this population can be searched for using observations in the anti-solar direction. In this work, we propose a search strategy for narrow decay-line signals from the ALP solar basin using \textit{XMM-Newton} blank-sky observations (XMM-BSOs) stacked spectra data taken in directions opposite to the Sun. By jointly fitting the signal and background model, we obtain limits on $g_{aγγ}^{95}$ in the mass range $m_a=1.4\text{--}16~{\rm keV}$, with typical sensitivities of $g_{aγγ}\sim10^{-10}\text{--}10^{-11}~{\rm GeV}^{-1}$. We have implemented the first anti-solar search for the solar basin, demonstrating that this strategy can exploit the stacked exposure of a large number of X-ray observations and provide a scalable analysis framework for future searches.
