Analysis strategies for general spin-independent WIMP-nucleus scattering
Analysis strategies for general spin-independent WIMP-nucleus scattering
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一般自旋无关 WIMP 核散射的分析策略
DOI：
10.1103/physrevd.94.063505
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发表时间：
2016
影响因子：
5
通讯作者：
A. Schwenk
中科院分区：
文献类型：
--
作者：
M. Hoferichter;P. Klos;J. Men'endez;A. Schwenk
我们提出了一个用于分析直接探测暗物质搜索的形式，它覆盖了标量和矢量相互作用的所有相干响应，并包含了手征对称性施加的QCD约束，包括手征有效场论中直到三级的所有一体和两体WIMP-核子相互作用。WIMP-核截面中的一个自由参数对应于标准的自旋无关搜索，但总的来说，我们探索了新物理耦合的不同组合。我们把与标准自旋无关响应和两体电流相对应的矢量干扰确定为对主要自旋无关结构因子的主要修正，并讨论了解释直接探测实验的一般结果，包括对标准自旋无关分析的最小扩展。基于最先进的核壳模型计算，提供了对氙靶散射所需的所有结构因素的拟合。
We propose a formalism for the analysis of direct-detection dark-matter searches that covers all coherent responses for scalar and vector interactions and incorporates QCD constraints imposed by chiral symmetry, including all one- and two-body WIMP-nucleon interactions up to third order in chiral effective field theory. One of the free parameters in the WIMP-nucleus cross section corresponds to standard spin-independent searches, but in general different combinations of new-physics couplings are probed. We identify the interference with the isovector counterpart of the standard spin-independent response and two-body currents as the dominant corrections to the leading spin-independent structure factor, and discuss the general consequences for the interpretation of direct-detection experiments, including minimal extensions of the standard spin-independent analysis. Fits for all structure factors required for the scattering off xenon targets are provided based on state-of-the-art nuclear shell-model calculations.