论文标题
直接检测白矮人中的原子暗物质
Direct Detection of Atomic Dark Matter in White Dwarfs
论文作者
论文摘要
暗物质可能具有原子暗物质形式的耗散性不对称子分量（ADM）。这在许多黑暗复杂性的情况下都会出现，并且是中性自然性的预测，例如《镜子双Higgs》模型。我们首次展示白矮人冷却如何在ADM上提供强大的界限。在黑暗和SM光子之间存在小动力学混合的情况下，预计恒星将在其核心中积聚原子暗物质，然后以深色光子的形式辐射能量。对于白矮人，这种能量损失可以对其冷却速率产生可检测的影响。我们使用白色矮人光度函数的测量值紧紧地约束黑暗和可见光子之间的动力学混合参数，跨DM质量的许多数量级，直至$ε\ sim \ sim 10^{ - 12} $的值。使用这种方法，我们可以约束场景，在这种情况下，ADM构成总深质物质密度的$ 10^{ - 3} $的分数。我们的方法与其他探测ADM的方法高度互补，尤其是在将ADM排列在黑暗磁盘中的情况下，这可能使直接检测变得极为困难，但实际上会稍微增强我们的冷却限制。
Dark matter could have a dissipative asymmetric subcomponent in the form of atomic dark matter (aDM). This arises in many scenarios of dark complexity, and is a prediction of neutral naturalness, such as the Mirror Twin Higgs model. We show for the first time how White Dwarf cooling provides strong bounds on aDM. In the presence of a small kinetic mixing between the dark and SM photon, stars are expected to accumulate atomic dark matter in their cores, which then radiates away energy in the form of dark photons. In the case of white dwarfs, this energy loss can have a detectable impact on their cooling rate. We use measurements of the white dwarf luminosity function to tightly constrain the kinetic mixing parameter between the dark and visible photons, across many orders of magnitude in DM mass, down to values of $ε\sim 10^{-12}$. Using this method we can constrain scenarios in which aDM constitutes fractions as small as $10^{-3}$ of the total dark matter density. Our methods are highly complementary to other methods of probing aDM, especially in scenarios where the aDM is arranged in a dark disk, which can make direct detection extremely difficult but actually slightly enhances our cooling constraints.
