标题： 利用同步辐射基于莫塞鲍尔谱学探测（超）轻暗物质 显示英文标题

标题： Probing (Ultra-) Light Dark Matter Using Synchrotron Based Mössbauer Spectroscopy

摘要： 我们提出使用基于同步辐射的莫斯鲍尔谱学技术来搜索（超）轻标量暗物质（DM）。 这种DM会引起各种基本常数的时间变化，从而导致核跃迁能量的时间调制。 当莫斯鲍尔源和吸收体之间有较大的基线时，可以通过光子吸收谱的调制来测试它们之间由于DM引起的能级偏移。 窄的莫斯鲍尔跃迁使该装置能够有效探测高频范围内的DM。 我们表明，利用现有同步辐射束流的莫斯鲍尔实验的探测能力与各种等效原理破坏搜索的限制相当。 对同步辐射装置的改进将使我们能够探测到迄今为止未探索的DM参数空间，直至兆赫兹频率。 所提出的方法将把DM搜索扩展到超越等效原理极限的几个数量级，并将在高（$>$kHz）频率区域为DM与各种标准模型场的相互作用强度提供最佳限制。 显示英文摘要

摘要： We propose to search for (ultra)-light scalar dark matter (DM) using synchrotron radiation based M\"ossbauer spectroscopy technique. Such DM induces temporal variation in various fundamental constants, which in turn causes time modulation of the nuclear transition energies. When a M\"ossbauer source and absorber is separated by a large baseline, the DM induced shift between their energy levels can be tested by the modulation of the photon absorption spectrum. The narrow M\"ossbauer transitions allow the setup to efficiently probe DM in the high frequency range. We show that the reach of a M\"ossbauer experiment with the existing synchrotron beams is at par with the bounds from various equivalence principle violation searches. An improvement of the synchrotron setup would enable us to probe the hitherto uncharted territory of the DM parameter space upto MHz frequency. The proposed method would extend the DM search beyond the EP limit by several orders of magnitude, and would provide the best bound on DM interaction strength with various standard model fields in the high ($>$kHz) frequency region.