Interpreting dark matter direct detection independently of the local velocity and density distribution
Interpreting dark matter direct detection independently of the local velocity and density distribution
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DOI：
10.1103/physrevd.83.034007
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发表时间：
2010-11
影响因子：
5
通讯作者：
P. Fox;G. Kribs;T. Tait
中科院分区：
文献类型：
--
作者：
P. Fox;G. Kribs;T. Tait
我们精确地展示了可以从暗物质的单个直接探测观测中提取的粒子物理信息，同时绝对不对暗物质的局部速度分布和局部密度进行假设。我们的中心结论来自一个非常简单的观察：暗物质的速度分布是正定的，f（v）{>=}0。我们证明了这一结果的效用在几个方面。首先，我们展示了一个下降的去卷积反冲光谱（去卷积的核形状因子），如从普通的弹性散射，可以“模仿”的任何质量的暗物质以上的运动学最小值。作为一个例子，我们表明，暗物质比以前认为的重得多可以解释CoGeNT过剩。具体地说，m{sub {chi} }m{sub Ge}取决于理解氙在非常低的反冲能量E{sub R} <或近似E {sub R}时对暗物质的敏感性。6 keVnr.其次，我们表明，任何上升的反卷积反冲光谱代表不同的粒子物理信息，不能伪造的任意f（v）。作为由此产生的非平凡粒子物理学的例子，我们证明了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。«少
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{sub {chi} }m{sub Ge} depends on understanding the sensitivity of xenon to dark matter at very low recoil energies, E{sub R} < or approx. 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 nontrivial particle physics, we show that inelastic dark matter and dark matter with a formmore » factor can both yield such a rise.« less