Topics in Theoretical Physics

理论基本粒子物理学的研究将集中在超对称理论的现象学（它将基本力与物质的组成联系起来）、粒子物理学非常成功的“标准模型”的其他可能的扩展、在称为大N_c极限的有希望的近似下受激重子的性质以及光子与物质高能碰撞中“π”粒子的产生。 标准模型是对基本粒子及其相互作用最成功的描述，但也留下了许多未解之谜。 这些问题只能通过考虑对这一基本图景的扩展来解决，就像在超对称理论中一样。 激发重子是观察到的粒子，其性质可能有助于我们理解强核力理论。 光子与物质的相互作用将使我们了解原子核的基本结构。 所有这些问题对于揭示物质的基本性质都很重要。

Research in theoretical elementary particle physics will focus on the phenomenology of supersymmetric theories (which relate the basic forces to the constituents of matter), other possible extensions of the very successful "standard model" of particle physics, the properties of excited baryons in a promising approximation called the large N_c limit, and the production of "pion" particles in energetic collisions of photons with matter. The standard model is the most successful description of elementary particles and their interactions, but leaves many questions unanswered. These can only be addressed by considering extensions to this basic picture, as in supersymmetric theories. Excited baryons are observed particles whose properties may shed light on our understanding of the theory of the strong nuclear force. The interactions of photons with matter will allow us to understand the basic structure of the nucleus of atoms. All these matters are important in unraveling the basic nature of matter.