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arXiv 2501.04020astro-ph.COhep-exhep-ph
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氙和锗的多体原子响应函数:有效场论中领先阶亚GeV暗物质-电子相互作用

Many-body atomic response functions of xenon and germanium for leading-order sub-GeV dark matter-electron interactions in effective field theory

National Dong Hwa University(东华大学);National Taiwan University(台湾大学);Central University of South Bihar(比哈尔南部中央大学);Institute of Physics, Academia Sinica(中央研究院物理研究所);Université de Montréal(蒙特利尔大学);National Center for Theoretical Sciences(国家理论科学中心);Yukawa Institute for Theoretical Physics, Kyoto University(京都大学汤川理论物理研究所)

C. -P. Liu, Mukesh K. Pandey, Lakhwinder Singh, Chih-Pan Wu, Jiunn-Wei Chen, Hsin-Chang Chi, Henry T. Wong

AI总结:

利用(多组态)相对论随机相位近似计算氙和锗的原子响应函数,考虑相对论、交换和关联效应,成功基准到光吸收数据,并更新了当前实验的排除限。

摘要:

质量能量小于1 GeV的暗物质候选者的直接搜索是一个活跃的研究领域。能量沉积与原子、分子或凝聚态系统的尺度相当,因此多体物理在理解暗物质散射中探测器响应方面起着重要作用。我们在本文中展示了氙和锗的原子响应函数的全面数据集,分别具有12.2和80 eV的能量阈值,使用(多组态)相对论随机相位近似。该方法在一个自洽框架中考虑了相对论、交换和关联效应,并通过从阈值到30 keV的光吸收数据成功基准,误差小于5%。与我们在文献中之前的和一些其他独立粒子方法进行了比较。还发现自旋依赖(SD)响应与自旋无关(SI)响应有显著差异,因此暗物质SD和SI与电子的相互作用可以在非极化散射中区分,这对于直接搜索探测器是典型的。最后,用我们的新结果更新了当前实验设定的排除限。

英文摘要:

Direct searches of dark matter candidates with mass energies less than 1 GeV is an active research field. The energy depositions are comparable to the scale of atomic, molecular, or condensed matter systems, therefore many-body physics plays an important role in understanding the detector's response in dark matter scattering. We present in this work a comprehensive data set of atomic response functions for xenon and germanium with 12.2 and 80 eV energy thresholds, respectively, using the (multiconfiguration) relativistic random phase approximation. This approach takes into account the relativistic, exchange, and correlation effects in one self-consistent framework, and is benchmarked successfully by photoabsorption data from thresholds to 30 keV with $\lesssim5\%$ errors. Comparisons with our previous and some other independent particle approaches in literature are made. It is also found that the spin-dependent (SD) response has significant difference from the spin-independent (SI) one such that the dark matter SD and SI interactions with electrons can be distinguished in unpolarized scattering, which is typical for direct search detectors. Finally, the exclusion limits set by current experiments are updated with our new results.

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。

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