标题： 独立于本地速度和密度分布的暗物质直接探测解释 显示英文标题

标题： Interpreting Dark Matter Direct Detection Independently of the Local Velocity and Density Distribution

摘要： 我们精确地展示了从一次暗物质直接探测观测中可以提取哪些粒子物理信息，同时对本地速度分布和暗物质本地密度不做任何假设。 我们的核心结论来自于一个非常简单的观察：暗物质的速度分布是正定的，f(v) >= 0。 我们以几种方式展示了这一结果的实用性。 首先，我们表明一个去卷积的反冲谱（去卷积了核形式因子），例如来自普通弹性散射的，可以被任何质量大于动力学最小值的暗物质“模拟”。 作为一个例子，我们表明比之前考虑的更重的暗物质可以解释CoGeNT的过量。 具体来说，m_chi < m_Ge\} 可以与轻暗物质一样好地符合，而 m_\chi > m_Ge 依赖于理解氙对非常低反冲能量，E_R ~ 6 keVnr 的灵敏度。 其次，我们表明去卷积的反冲谱中的任何上升都代表了独特的粒子物理信息，不能通过任意的 f(v) 来伪造。 作为产生的非平凡粒子物理的例子，我们表明非弹性暗物质和具有形式因子的暗物质都可以产生这样的上升。 显示英文摘要

摘要： We demonstrate precisely what particle physics information can be extracted from a single direct detection observation of dark matter while making absolutely no assumptions about the local velocity distribution and local density of dark matter. Our central conclusions follow from a very simple observation: the velocity distribution of dark matter is positive definite, f(v) >= 0. We demonstrate the utility of this result in several ways. First, we show a falling deconvoluted recoil spectrum (deconvoluted of the nuclear form factor), such as from ordinary elastic scattering, can be "mocked up" by any mass of dark matter above a kinematic minimum. As an example, we show that dark matter much heavier than previously considered can explain the CoGeNT excess. Specifically, m_chi < m_Ge} can be in just as good agreement as light dark matter, while m_\chi > m_Ge depends on understanding the sensitivity of Xenon to dark matter at very low recoil energies, E_R ~ 6 keVnr. Second, we show that any rise in the deconvoluted recoil spectrum represents distinct particle physics information that cannot be faked by an arbitrary f(v). As examples of resulting non-trivial particle physics, we show that inelastic dark matter and dark matter with a form factor can both yield such a rise.