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: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=521907
• 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.

高能物理标准模型（SM）经过了彻底的检验，并得到了实验的证实。但该模型存在理论不一致性，大多数物理学家认为它是高能量对称的低能表现。在过去的几十年里，理论学家孜孜不倦地为这种新的对称性提供了许多可能性。但现在，随着欧洲核子研究中心（CERN）大型强子对撞机（LHC）的即将启动，以及建造国际线性对撞机（ILC）的计划，我们将第一次能够验证这些预测。需要回答的重要问题是模型判别：如果在对撞机上检测到新物理的明确信号（与SM预测相反的东西），我们如何区分产生该信号的模型。我们在康考迪亚大学的小组部分负责开发一个模型，该模型将超对称（费米-玻色子对称）和左右对称（镜像或宇称）添加到标准模型中。超对称被广泛认为是高能下最有希望的对称，而左右对称为（必要的）中微子质量提供了最优雅的机制。利用现有的模型构建和对撞机事件模拟软件，我计划构建一个完整且自一致的模型图像，其中所有参数将相互关联并减少到少数基本参数。然后，我想用它来预测这个模型在对撞机上最可能的信号是什么，并指出如何将这些信号与其他模型的预测区分开来。比较LHC（碰撞能量更大，更适合产生强相互作用的粒子）和ILC（背景信号更小，更适合产生电弱相互作用的粒子）的信号是很重要的，因为该模型在粒子含量和相对相互作用方面都与SM不同。我已经预测了其中的一些信号，但还有很多工作要做。本项目涉及大量的学生培养，部分内容将构成博士论文；以及与加拿大和国外团体的合作。