Testing beyond MSSM scenarios at the LHC and ILC

预计未来5-10年将是粒子物理学非常激动人心的一年。唯一被实验证实的粒子相互作用模型——标准模型——包含了一些基本的理论矛盾。物理学家们已经构建了几个可供选择的模型，但这些模型还没有得到检验的机会。欧洲核子研究中心的大型强子对撞机（LHC）和国际线性对撞机（ILC）可能会改变这一切，大型强子对撞机预计将于2007年开始收集数据。然而，如果产生的数据与标准模型预测的不一致，一个重要的问题将是：标准模型之外的哪一种情况与实验信号一致。我建议研究这个问题，主要集中在我们在康考迪亚开发的一个模型上，这个模型将超对称（费米-玻色子对称）和左右对称（镜像或宇称）纳入标准模型。我打算把重点放在这个模型最有希望的信号上，并把这些信号从其他模型中得到的信号中分离出来。因此，与此同时，我也会考虑其他可能的模式。我的一些研究将涉及将LHC获得的数据与ILC的信号进行比较，后者的背景信号不那么复杂，而且这种特殊的模型可以提供更明确的事件，其中一些将相当壮观。这个项目代表了我对这个特定模型及其在碰撞器上的区别标志的兴趣的延续。我建议以一种系统的方式开始，画出一幅模型一致预测的清晰图景，然后继续寻找与更知名、更广泛探索的模型可能存在的偏差。我和我在Concordia的团队（研究生和一名博士后）一起工作，但我也和以色列、欧洲和美国的团队合作。

The next 5-10 years are expected to be very exciting for particle physics. The only experimentally confirmed model for particle interactions, the Standard Model, contains some fundamental theoretical inconsistencies. Physicists have constructed several alternative models, but these have not yet had the chance of being tested. The Large Hadron Collider (LHC) at CERN and the International Linear Collider (ILC) are likely to change all that, with the LHC expected to start taking data in 2007. However, if the data produced turns out to be inconsistent with that predicted by the Standard Model, an important question will be: which one of the scenarios beyond the Standard Model is the one consistent with the experimental signals. I propose to investigate this question, focusing mostly on a model that we developed at Concordia, which incorporates supersymmetry (a fermion-boson symmetry) and left-right (mirror, or parity) symmetry into the Standard Model. I plan to concentrate on the most promising signs for this model, and disentangle these from signals obtained in other models. Thus, at the same time, I will be looking at other possible models as well. Some of my studies will involve comparing the data obtained at the LHC with signals at the ILC, where the background signals are less complicated, and where this particular model could provide more definite events, some of which would be rather spectacular. This project represents a continuation of my interest in this specific model and its distinguishing signs at colliders.  I propose to start in a systematic way and draw a clear picture of what the model predicts consistently, then move on to search for possible deviations from the better known, and more widely explored, models. I work with my group at Concordia (graduate students and one postdoctoral fellow), but I also collaborate with groups in Israel, Europe and the US.