论文标题

XQC和CSR在强烈相互作用的暗物质与自旋和速度依赖性横截面的约束

XQC and CSR constraints on strongly interacting dark matter with spin and velocity dependent cross sections

论文作者

Li, Yonglin, Liu, Zuowei, Xue, Yilun

论文摘要

与重子相互作用的暗物质可以避免严格的暗物质直接检测约束,因为像重子一样,它们在穿越岩石时可能会被吸收,从而导致深层地下实验室的抑制通量。但是,这种强烈相互作用的暗物质可以通过在地面或大气中进行的暗物质实验或其他实验进行探测。在本文中,我们对其中两个实验XQC和CSR进行了系统分析,以计算以下三种情况下对强相互作用的暗物质的实验约束:(1)与自旋无关和自旋依赖性相互作用; (2)不同速度依赖性横截面; (3)不同的暗物质质量分数。文献中首先分析了一些场景。我们发现,XQC独占区对各种参数具有一些非平地依赖性,而自旋依赖性情况中的限制与自旋非依赖性情况大不相同。在我们的蒙特卡洛模拟中也发现了参数空间中XQC约束的特殊区域。在相互作用横截面与速度平方成比例的情况下,发生这种情况。我们进一步将XQC和CSR限制与其他实验约束进行了比较,并发现如果暗物质质量分数足够小,则可以通过各种实验允许大型参数空间,$f_χ\f_χ\ sillesim 10^{ - 4} $。

Dark matter that interacts strongly with baryons can avoid the stringent dark matter direct detection constraints, because, like baryons, they are likely to be absorbed when traversing the rocks, leading to a suppressed flux in deep underground labs. Such strongly interacting dark matter, however, can be probed by dark matter experiments or other experiments operated on the ground level or in the atmosphere. In this paper we carry out systematic analysis of two of these experiments, XQC and CSR, to compute the experimental constraints on the strongly interacting dark matter in the following three scenarios: (1) spin-independent and spin-dependent interactions; (2) different velocity dependent cross sections; (3) different dark matter mass fractions. Some of the scenarios are first analyzed in the literature. We find that the XQC exclusion region has some non-trivial dependencies on the various parameters and the limits in the spin-dependent case is quite different from the spin-independent case. A peculiar region in the parameter space, where the XQC constraint disappears, is also found in our Monte Carlo simulations. This occurs in the case where the interaction cross section is proportional to the square of the velocity. We further compare our XQC and CSR limits to other experimental constraints, and find that a large parameter space is allowed by various experiments if the dark matter mass fraction is sufficiently small, $f_χ\lesssim 10^{-4}$.

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