Higgs search by means of τ vertex tagging

美国费米实验室在升级了Tevatron加速器和CDF和D0探测器后，于2001年启动了Run II实验。在Run II的触发水平上标记Tau轻子候选者，其中孤立的和奇数轨迹表明τ衰变。高性能的CDF硅跟踪系统可以测量衰变长度有限的τ轻子的冲击参数。这些影响参数有望提高τ鉴定的纯度。我们模拟了希格斯搜索区域，假设综合光度为2 fb^<-1>，这是运行II第一阶段的目标。一旦获得真实数据，我们的分析方法将用于希格斯粒子的搜索。在探测器研究方面，开发了用于τ轻子标记的硅微带探测器。正如我们在下一页列出的论文中所示，我们实现了抗雷达、无死时的高速读出和高分辨率探测器。本文提出了利用τ顶点标记进行希格斯粒子搜索的方法。由于希格斯玻色子的研究是一个有诺贝尔奖价值的重大课题，用这种规模的预算是无法完成的。我们正在申请下一个预算来扩展希格斯粒子的研究。

At Fermilab in USA, Run II experiment started in 2001 after the upgrade of Tevatron accelerator and CDF and D0 detectors. Tau lepton candidates are tagged, where isolated and odd number tracks suggest τ decays, at a trigger level in Run II. High performance of the silicon tracking system of CDF can measure the impact parameters of the daughters of τ leptons whose decay lengths are finite. The impact parameters are expected to enhance τ identification purity. We simulated Higgs search region assuming 2 fb^<-1> of integrated luminosity which is the goal of the first stage of Run II. Our analysis method will be used for the Higgs search as soon as real data will be available.For detector studies, silicon microstrip detectors efficient for τ lepton tagging were developed. As shown in our papers listed on the next page, we achieved rad-hard, dead-time-less high-speed readout and high-resolution detectors.This study showed the method of the Higgs search by means of τ vertex tagging. Since the Higgs search is a great subject valuable for a Nobel prize, it can not be completed with the budget of this scale. We are applying the next budget to extend our Higgs search.