Beyond MSSM scenarios at the LHC and ILC

超越 LHC 和 ILC 的 MSSM 场景

• 批准号: 105354-2010
• 负责人: Frank, Mariana
• 金额: $ 2.7万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=513582
• 关键词: Beyond; MSSM; scenarios; LHC; ILC

The Standard Model of High Energy Physics (SM) has been thoroughly tested, and confirmed by experiments. But the model suffers from theoretical inconsistencies and most physicists regard it as a low-energy manifestation of a higher energy symmetry. For the past decades, theorists have diligently produced many possibilities for what the new symmetry might look like. But for the first time, with the imminent start of the Large Hadron Collider (LHC) at CERN, and with plans to build the International Linear Collider (ILC), now we would be able to test those predictions. The important question to be answered is model discrimination: if a clear signal of new physics (something that runs counter to SM predictions) is detected at the colliders, how can we distinguish the model responsible for it. Our group at Concordia University is responsible, in part, for developing a model which adds supersymmetry (a fermion-boson symmetry) and left-right (mirror, or parity) symmetry to the Standard Model. Supersymmetry is widely believed to be the most promising symmetry at higher energies, while left-right symmetry provides the most elegant mechanism for (necessary) neutrino masses. Using available software designed for model building and collider event simulations, I plan to construct a complete and self-consistent picture of the model, in which all the parameters would be interrelated and reduced to a small number of fundamental ones. Then, I want to use it to predict what are the most likely signals of this model at colliders, and indicate how to discriminate these from what other models predict. It is important to compare the signals coming from both the LHC (larger collision energy, and better for producing strongly interacting particles) and the ILC (smaller background signals, good for generating electro-weakly interacting particles), as the model differs from the SM in both particle content and relative interactions. I have already predicted some of these signals, but a lot more work remains to be done. This project involves significant student training, as some parts will constitute PhD theses; as well as collaborations with groups in Canada and abroad.

高能物理（SM）标准模型已经过彻底的测试，并通过实验得到证实。但该模型存在理论上的不一致，大多数物理学家将其视为较高能量对称性的低能量表现。在过去的几十年里，理论家们努力地为新对称性的外观提出了许多可能性。 但随着欧洲核子研究中心大型强子对撞机 (LHC) 即将启动，以及建造国际直线对撞机 (ILC) 的计划，现在我们第一次能够测试这些预测。要回答的重要问题是模型辨别：如果在对撞机上检测到新物理的清晰信号（与 SM 预测相反的东西），我们如何区分造成它的模型。我们康科迪亚大学的小组部分负责开发一种模型，该模型在标准模型中添加了超对称性（费米子-玻色子对称性）和左右（镜像或宇称）对称性。超对称性被广泛认为是高能量下最有前途的对称性，而左右对称性为（必要的）中微子质量提供了最优雅的机制。使用专为模型构建和碰撞事件模拟设计的可用软件，我计划构建一个完整且自洽的模型图，其中所有参数都将相互关联并减少到少量基本参数。然后，我想用它来预测该模型在碰撞器上最可能的信号是什么，并指示如何将这些信号与其他模型的预测区分开来。比较来自 LHC（较大的碰撞能量，更有利于产生强相互作用粒子）和 ILC（较小的背景信号，有利于产生电弱相互作用粒子）的信号非常重要，因为该模型在粒子含量和相对相互作用方面与 SM 不同。我已经预测了其中一些信号，但还有很多工作要做。该项目涉及大量的学生培训，因为某些部分将构成博士论文；以及与加拿大和国外团体的合作。