利用国盛反应堆中微子实验室的锗探测器约束类轴子粒子
Constraining Axion-Like-Particles with germanium detector at the Kuo-Sheng Reactor Neutrino Laboratory
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中文总结 AI 辅助
该研究基于TEXONO实验的锗探测器数据，对国盛反应堆产生的类轴子粒子进行搜寻，未观测到显著超出，推导得到其两类耦合的上限并开展联合分析。
中文摘要 AI 辅助
我们利用国盛核电站TEXONO实验采集的数据，给出了对通过 Primakoff 和类康普顿散射道产生的类轴子粒子（ALPs）的搜寻结果。该分析基于278.91天的反应堆开启数据和43.60天的反应堆关闭数据，这些数据由位于2.9GW反应堆堆芯28米处的1.06kg高纯度锗探测器采集。在反应堆开启与关闭数据相减后的剩余能谱中，未观测到显著超出。利用低本底锗探测器采集的数据，在90%置信水平下，针对质量范围为1eV至3MeV的ALPs，推导得到了ALP-光子耦合（g_{aγγ}）和ALP-电子耦合（g_{aee}）的上限。由于g_{aγγ}和g_{aee}耦合均对ALP的产生和探测有贡献，因此将两个道作为活跃参数进行了联合分析。
英文摘要
We present results of a search for Axion-Like Particles (ALPs) produced $via$ Primakoff and Compton-like scattering channels, using data acquired with TEXONO experiment at the Kuo-Sheng Nuclear Power Station. The analysis is based on 278.91 days of reactor-ON and 43.60 days of reactor-OFF data. These datasets were collected using a 1.06 kg high-purity germanium detector located 28 m from a 2.9 GW reactor core. No significant excess is observed in the residual spectrum from the reactor-ON and reactor-OFF data subtraction. Using data acquired with low-background germanium detectors, upper limits on both the ALP-photon ($g_{aγγ}$) and ALP-electron ($g_{aee}$) couplings are derived for ALP masses ranging from 1 eV to 3 MeV at 90\% confidence level. Since both $g_{aγγ}$ and $g_{aee}$ couplings contribute to ALP production and detection, a combined analysis is performed by treating both channels as active parameters.
