Search for solar axions produced by Compton process and bremsstrahlung using axioelectric effect

Search for solar axions produced by Compton process and bremsstrahlung using the resonant absorption and axioelectric effect

The search for resonant absorption of Compton and bremsstrahlung solar axions by $^{169}$Tm nuclei have been performed. Such an absorption should lead to the excitation of low-lying nuclear energy level: $A+^{169}$Tm $\rightarrow ^{169}$Tm$^*$ $\rightarrow ^{169}$Tm $+ γ$ (8.41 keV). Additionally the axio-electric effect in silicon atoms is sought. The axions are detected using a Si(Li) detectors placed in a low-background setup. As a result, a new model independent restrictions on the axion-electron and the axion-nucleon coupling: $g_{Ae}\times|g^0_{AN}+ g^3_{AN}|\leq 2.1\times10^{-14}$ and t…

由类韧致辐射过程产生的太阳强子轴子的搜寻

Search for solar hadronic axions produced by a bremsstrahlung-like process

我们已经寻找强子轴子，这可能是在太阳中产生的韧致辐射的过程，并观察到在HPGe探测器的轴电效应。在95% C. L时，强子轴子质量m_a的保守上限小于334 eV.得出我们的实验方法是基于轴子-电子耦合，它不包括轴子-核子耦合，这遭受了很大的不确定性相关的味道单重轴矢量矩阵元的估计。

Constraints on the axion-electron coupling for solar axions produced by Compton process and bremsstrahlung

The search for solar axions produced by Compton ($γ+e^-\rightarrow e^-+A$) and bremsstrahlung-like ($e^-+Z \rightarrow Z+e^-+A$) processes has been performed. The axion flux in the both cases depends on the axion-electron coupling constant. The resonant excitation of low-lying nuclear level of $^{169}\rm{Tm}$ was looked for: $A+^{169}$Tm $\rightarrow ^{169}$Tm$^*$ $\rightarrow ^{169}$Tm $+ γ$ (8.41 keV). The Si(Li) detector and $^{169}$Tm target installed inside the low-background setup were used to detect 8.41 keV $γ$-rays. As a result, a new model independent restriction on the axion-electro…

DVCS的最新HERMES结果

Recent HERMES Results on DVCS

在高能轻子与核子/核碰撞中，由于深度虚康普顿散射（DVCS）和韧致辐射的干涉，导致了束荷不对称，从而导致了光子的产生。最近的结果为氢和氘目标的报告和一致的趋势上升的余弦φ系数与动量转移|t|已被发现。

利用RES-NOVA进行太阳轴子搜索：预测灵敏度和首个原型限制

Solar axion searches with RES-NOVA: projected sensitivity and first prototype limit

RES-NOVA原用于探测超新星中微子散射，现被证明可用于搜索太阳轴子。通过计算多种成分信号，推导其在不同平面的预测灵敏度，并给出首个原型的排除极限，确立其为有前途的太阳轴子多耦合探测器，与现有搜索互补。