用quax - γ实验寻找质量为ma=43 μeV的不可见轴子暗物质

arXiv: High Energy Physics - Experiment Pub Date : 2020-12-17 DOI:10.1103/PhysRevD.103.102004

D. Alesini, C. Braggio, G. Carugno, N. Crescini, D. D'Agostino, D. Di Gioacchino, R. Di Vora, P. Falferi, U. Gambardella, C. Gatti, G. Iannone, C. Ligi, A. Lombardi, G. Maccarrone, A. Ortolan, R. Pengo, A. Rettaroli, G. Ruoso, L. Taffarello, S. Tocci

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引用次数: 69

摘要

为了寻找质量为$m_a\simeq43~\mu\text{eV}$的星系轴子，在8.1 T的磁体中放置了一个OFHC-Cu腔体，冷却到$\sim200$ mK，并投入使用了QUAX- $a\gamma$实验的光镜。用噪声波动处于标准量子极限的约瑟夫森参量放大器对谐振腔发出的功率进行放大。在谐振腔频率$\nu_c=10.40176$ GHz约1 h内采集的数据，实验达到了探测银河系qcd -轴子所需的灵敏度，并设定了轴-光子耦合的$90\%$置信水平(CL)限制$g_{a\gamma\gamma}<0.639\cdot10^{-13}$ GeV $^{-1}$。

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Search for invisible axion dark matter of mass ma=43 μeV with the QUAX– aγ experiment

An haloscope of the QUAX--$a\gamma$ experiment composed of an OFHC-Cu cavity inside an 8.1 T magnet and cooled to $\sim200$ mK was put in operation for the search of galactic axion with mass $m_a\simeq43~\mu\text{eV}$. The power emitted by the resonant cavity was amplified with a Josephson Parametric Amplifier whose noise fluctuations are at the Standard Quantum Limit (SQL). With the data collected in about 1 h at the cavity frequency $\nu_c=10.40176$ GHz the experiment reached the sensitivity necessary for the detection of galactic QCD-axion setting the $90\%$ confidence level (CL) limit to the axion-photon coupling $g_{a\gamma\gamma}<0.639\cdot10^{-13}$ GeV$^{-1}$.

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arXiv: High Energy Physics - Experiment

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