Bertone G, Cerdeño D G, Collar J I, Odom B
INFN, Sezione di Padova, Via Marzolo 8, Padova I-35131, Italy.
Phys Rev Lett. 2007 Oct 12;99(15):151301. doi: 10.1103/PhysRevLett.99.151301. Epub 2007 Oct 8.
We study the prospects for detecting weakly interacting massive particles (WIMPs) in a number of phenomenological scenarios, with a detector composed of a target simultaneously sensitive to both spin-dependent and spin-independent couplings, as is the case of COUPP (Chicagoland Observatory for Underground Particle Physics). First, we show that sensitivity to both couplings optimizes chances of initial WIMP detection. Second, we demonstrate that, in case of detection, a comparison of the signal on two complementary targets, such as in COUPP CF3I and C4F10 bubble chambers, allows a significantly more precise determination of the dark matter axial and scalar couplings. This strategy would provide crucial information on the nature of the WIMPs and possibly allow discrimination between neutralino and Kaluza-Klein dark matter.
我们研究了在一些唯象学情景中探测弱相互作用大质量粒子（WIMP）的前景，探测器由对自旋相关和自旋无关耦合均同时敏感的靶材组成，就像芝加哥地下粒子物理天文台（COUPP）的情况那样。首先，我们表明对两种耦合的敏感性优化了首次探测到WIMP的机会。其次，我们证明，在探测到的情况下，比较两个互补靶材上的信号，比如COUPP的CF3I和C4F10气泡室中的信号，能显著更精确地确定暗物质的轴向和标量耦合。这种策略将提供关于WIMP性质的关键信息，并可能有助于区分中性子和卡鲁扎 - 克莱因暗物质。
