论文标题
与Majorata示威者一起搜索异国情调的暗物质
Exotic dark matter search with the Majorana Demonstrator
论文作者
论文摘要
具有出色的能量分辨率和超低水平的放射性背景，Majorana演示器中的高纯族探测器可以搜索几类外来暗物质（DM）模型。在这项工作中，我们通过从转换到主动中微子的过渡磁矩，$ν_s\rightarrowν_a$报告了KEV尺度无菌中微子DM的新实验限制。我们报告了有关费米金暗物质吸收的新限制（$χ+ a \rightarrowν+ a $）和sub-gev dm-nucleus 3 $ \ rightarrow $ 2散射（$χ+χ+χ+ ac+ righArrow ϕ+ a $），以及针对Bosonic Dark Matter（Axion-Dark Matter）（axionlike Photyles and dark photectlike and Dark photemles and dark photectlike and rexculusion limits）。这些搜索利用了示威者在2016年5月至2019年11月之间收集的37.5公斤y暴露的（1--100）-keV低能区域，使用一组$^{76} $ ge-ge-ge-Ency-endriched探测器，其表面暴露时间经过了仔细控制，从而仔细控制了宇宙基础激活的水平极低。
With excellent energy resolution and ultra-low level radiogenic backgrounds, the high-purity germanium detectors in the Majorana Demonstrator enable searches for several classes of exotic dark matter (DM) models. In this work, we report new experimental limits on keV-scale sterile neutrino DM via the transition magnetic moment from conversion to active neutrinos, $ν_s \rightarrow ν_a$. We report new limits on fermionic dark matter absorption ($χ+ A \rightarrow ν+ A$) and sub-GeV DM-nucleus 3$\rightarrow$2 scattering ($χ+ χ+ A \rightarrow ϕ+ A$), and new exclusion limits for bosonic dark matter (axionlike particles and dark photons). These searches utilize the (1--100)-keV low energy region of a 37.5-kg y exposure collected by the Demonstrator between May 2016 and November 2019, using a set of $^{76}$Ge-enriched detectors whose surface exposure time was carefully controlled, resulting in extremely low levels of cosmogenic activation.
