标题： 简化超对称在ILC中 显示英文标题

标题： Simplified SUSY at the ILC

摘要： 在ILC上，可以以与模型无关的方式搜索超对称性：超对称性的核心在于超粒子与粒子耦合。 这与导致超对称性破缺的机制无关。 任何模型都将有一个最轻的超对称粒子（LSP）和一个次轻的超对称粒子（NLSP）。 在具有守恒R-宇称的模型中，NLSP只能衰变为LSP和NLSP的SM对应粒子。 因此，研究NLSP的产生和衰变可以被视为一种“简化模型而不进行简化”：任何超对称模型都会有这样的过程。 NLSP可以是任何超粒子：如轻子超子、电弱ino，甚至是夸克超子。 然而，由于只有有限数量的超粒子，可以系统地搜索所有可能的NLSP的信号。这样，所有具有动力学上可达到的NLSP的模型空间都可以被覆盖。 对于任何NLSP，可以确定“最坏情况”，因为一旦给定NLSP的性质和质量，超对称原理允许计算截面。 通过在平面中的每一点估计背景和效率，可以找到在LSP-NLSP质量平面上“最坏情况”可以被实验发现或排除的区域。 根据LEP的经验，预计对于具有守恒R-宇称的模型，确实会发现较低的信号与背景比。 在本文中，我们展示了在ILC上，这种计划是可行的，就像在LEP上一样。 即使对于困难或非标准的情况，也没有漏洞：无论NLSP是什么，它都将是可以被探测到的。 显示英文摘要

摘要： At the ILC, one has the possibility to search for SUSY in an model-independent way: The corner-stone of SUSY is that sparticles couple as particles. This is independent of the mechanism responsible for SUSY breaking. Any model will have one Lightest SUSY Particle (LSP), and one Next to Lightest SUSY Particle (NLSP). In models with conserved R-parity, the NLSP must decay solely to the LSP and the SM partner of the NLSP. Therefore, studying NLSP production and decay can be regarded as a "simplified model without simplification": Any SUSY model will have such a process. The NLSP could be any sparticle: a slepton, an electroweak-ino, or even a squark. However, since there are only a finite number of sparticles, one can systematically search for signals of all possible NLSP:s. This way, the entire space of models that have a kinematicall y reachable NLSP can be covered. For any NLSP, the "worst case" can be determined, since the SUSY principle allows to calculate the cross-section once the NLSP nature and mass are given. The region in the LSP-NLSP mass-plane where the "worst case" could be discovered or excluded experimentally can be found by estimating background and efficiency at each point in the plane. From experience at LEP, it is expected that the lower signal-to background ratio will indeed be found for models with conserved R-parity. In this document, we show that at the ILC, such a program is possible, as it was at LEP. No loop-holes are left, even for difficult or non-standard cases: whatever the NLSP is it will be detectable.