Analysis of the long-lived slepton next-to-lightest supersymmetric particle in the gauge-mediated supersymmetry breaking model at a linear collider
Analysis of the long-lived slepton next-to-lightest supersymmetric particle in the gauge-mediated supersymmetry breaking model at a linear collider
复制标题
线性对撞机规范介导的超对称破缺模型中长寿命的轻子超对称粒子的分析
DOI：
10.1103/physrevd.64.015005
复制
发表时间：
2000
影响因子：
5
通讯作者：
H. Yamamoto
中科院分区：
文献类型：
--
作者：
P. Mercadante;J. Mizukoshi;H. Yamamoto
我们在S=500GeV的直线对撞机上对长寿命背子的探测进行了分析。在规范介导的对称破缺模型中，对于较大的超对称破缺标度{自由基}F，预言了一个长寿命的NLSP。此外，在参数空间的很大一部分中，这个粒子是STAU。如此重的带电粒子将在跟踪体积中留下轨迹，并击中Muonic探测器。为了将这一信号从Muon背景中分离出来，我们探索了运动学和粒子识别工具：飞行时间设备、De/DX和Cherenkov设备。我们证明，线性对撞机将能够探测到质量达到机器运动极限的长寿命天体。我们还给出了对STAU寿命的灵敏度的估计。
We performed an analysis on the detection of a long-lived slepton at a linear collider with {radical}s=500 GeV. In gauge-mediated symmetry breaking models a long-lived NLSP is predicted for a large value of the supersymmetry breaking scale {radical}F. Furthermore in a large portion of the parameter space this particle is a stau. Such heavy charged particles will leave a track in the tracking volume and hit the muonic detector. In order to disentangle this signal from the muon background, we explore the kinematics and particle identification tools: a time-of-flight device, dE/dX, and Cherenkov devices. We show that a linear collider will be able to detect long-lived staus with masses up to the kinematical limit of the machine. We also present our estimation of the sensitivity to the stau lifetime.