Beyond MSSM scenarios at the LHC and ILC

高能物理标准模型(SM)已经得到了彻底的检验，并得到了实验的证实。但该模型存在理论上的不一致之处，大多数物理学家认为它是较高能量对称性的低能量表现形式。在过去的几十年里，理论家们勤奋地为新对称可能是什么样子创造了许多可能性。但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，现在我们第一次能够检验这些预测。需要回答的重要问题是模型识别：如果在对撞机上探测到明确的新物理信号(与SM预测相反的东西)，我们如何区分对此负责的模型。我们康科迪亚大学的团队在一定程度上负责开发了一个模型，该模型将超对称性(费米子-玻色子对称性)和左右(镜像，或宇称)对称性添加到标准模型中。超对称性被广泛认为是更高能量下最有希望的对称性，而左右对称性为(必要的)中微子质量提供了最优雅的机制。使用可用于建模和对撞机事件模拟的现有软件，我计划构建一个完整和自洽的模型图，其中所有参数都将相互关联，并简化为少数基本参数。然后，我想用它来预测在对撞机上这个模型最有可能的信号是什么，并指出如何将这些信号与其他模型预测的信号区分开来。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不同于SM。我已经预测到了其中的一些信号，但还有更多的工作要做。这个项目涉及大量的学生培训，因为有些部分将构成博士论文；以及与加拿大和国外的团体合作。

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.