Investigation of possible dark matter direct detection in electron accelerators
Investigation of possible dark matter direct detection in electron accelerators
复制标题
DOI：
10.1103/physrevd.73.031701
复制
发表时间：
2005-04
影响因子：
5
通讯作者：
J. Hisano;M. Nagai;M. Nojiri;Masato Senami
中科院分区：
文献类型：
--
作者：
J. Hisano;M. Nagai;M. Nojiri;Masato Senami
本文研究了在未来的电子加速器中直接探测中性伴子暗物质的可能性。这就是晕中中性伴子对高p{sub T}电子反冲事件的计数。如果在未来的对撞机实验中能够精确测量选择子和中性伴子的质量，那么就可以调整射束能量，使散射主要由极上的选择子交换来控制。当选择子和中性伴子质量差小于0（10）GeV时，弹性截面超过微垒。高p{sub T}电子事件的发现将是晕中中性伴子DM成分的有力证明。在实验中，电子束能量必须在O（10）MeV以内调谐，对于总长几百米的探测器，要求有O（100）A的大电流电子束，以获得足够的事件率。本文还讨论了事件率与晕中DM速度分布的关系。这种方法可能适用于其他DM候选人。
We investigate a possibility of neutralino dark matter (DM) direct detection in the future electron accelerators. That is counting of high p{sub T} electron recoil events by neutralinos in halo. If selectron and neutralino masses would be precisely measured in future collider experiments, the beam energy could be tuned so that the scatterings are dominated by on-pole selectron exchange. When selectron and neutralino mass difference is smaller than O(10) GeV, the elastic cross section exceeds over micro barn. Discovery of the high p{sub T} electron events would be a firm prove of the neutralino DM component in halo. In the experiment, the electron beam energy must be tuned within O(10) MeV and the electron beam with high currents of O(100)A is required for the detectors of the total length of a few hundred meters so that the sufficient event rate is obtained. The dependence of the event rate on the DM velocity distribution in halo is also discussed. This method might be applicable to other DM candidates.