Characterising WIMPs at a future e+e- linear collider
Characterising WIMPs at a future e+e- linear collider
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DOI：
10.1140/epjc/s10052-012-2213-9
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发表时间：
2012-11-01
影响因子：
4.4
通讯作者：
List, Jenny
中科院分区：
文献类型：
--
作者：
Bartels, Christoph;Berggren, Mikael;List, Jenny
我们研究了在国际直线对撞机上以独立于模型的方式检测和测量 WIMP 暗物质参数的前景。所研究的信号是直接 WIMP 对产生以及相关的初始态辐射 e(+)e(-) -> chi chi gamma。该分析考虑了 ILC 的光束能谱和主导机器引起的背景。探测器参数的影响通过 ILD 探测器概念框架内的完整模拟和事件重建来纳入。我们表明，通过使用偏振光束，通过减少伽玛条上的辐射中微子产生 e(+)e(-) -> nu(nu) 的主要 SM 背景，检测潜力显着增加。系统不确定性的主要来源是偏振测量的精度和光束能谱的形状。当积分光度为 L = 500 fb(-1) 时，可以推断出所涉及的相互作用的螺旋结构，并且可以以 1% 量级的相对精度测量质量和横截面。
We investigate the prospects for detecting and measuring the parameters of WIMP dark matter in a model-independent way at the International Linear Collider. The signal under study is direct WIMP pair production with associated initial state radiation e(+)e(-) -> chi chi gamma. The analysis accounts for the beam energy spectrum of the ILC and the dominant machine induced backgrounds. The influence of the detector parameters are incorporated by full simulation and event reconstruction within the framework of the ILD detector concept. We show that by using polarised beams, the detection potential is significantly increased by reduction of the dominant SM background of radiative neutrino production e(+)e(-) -> nu(nu) over bar gamma. The dominant sources of systematic uncertainty are the precision of the polarisation measurement and the shape of the beam energy spectrum. With an integrated luminosity of L = 500 fb(-1) the helicity structure of the interaction involved can be inferred, and the masses and cross sections can be measured with a relative accuracy of the order of 1 %.