粒子物理模型构造和唯象

项目研究超出标准模型的新粒子物理模型、唯象和将来的实验检验: 我们针对标准模型和超对称标准模型的基本问题,结合大型强子对撞机对新物理寻找的结果和限制,提出能满足目前实验限制的粒子物理模型特别是能自然解释电弱精细调节问题的超对称标准模型, 并讨论它们的唯象和物理预言,以及如何在将来的对撞机上检验这些模型。我们将研究超弦模型构造及唯象和超弦诱导的低能唯象，如低能超对称粒子谱及其一般特性， 暗物质剩余丰度和实验限制，并讨论如何在将来的对撞机上寻找等。我们将研究低能大统一理论， 讨论质子衰变， 费米子质量与混合， 规范耦合常数和Yukawa耦合常数的统一， 重子数和轻子数对称性破坏， 以及如何在将来的对撞机上检验等。我们也将研究超对称破缺的传导机制和超对称大统一理论，并用我们提出的Gaugino 质量关系式的指数来探究区分不同的超对称破缺的传导机制和超对称大统一模型。

This research proposal studies the new particle physics models beyond the Standard Model (SM), their phenomenological consequences, and the future experimental tests: concentrating on the basic problems in the SM and supersymmetric SMs as well as the experimental results and constraints from the Large Hadron Collider (LHC), we propose the particle physics models which satisfy all the current experimental constraints, especially the supersymmetric SMs which can naturally solve the electroweak fine-tuning problem. We shall study their phenomenological consequences and physics predictions, as well as how to test these models at the future colliders. We shall study the string model building and phenomenology, and string inspired low energy phenomenology, such as the low energy supersymmetric particle speactra and their generic properties, dark matter relic density and exprimental constraints, and how to search for these models at the future colliders, etc. We will study the low energy Grand Unified Theories (GUTs), and discuss proton decays, fermion masses and mixings, gauge coupling unification and Yukawa coupling unification, baryon and lepton number symmetry breaking, and how to test these GUTs at the future colliders, etc. We shall also study the supersymmetry breaking mediation mechanism and supersymmetric GUTs. With our proposed index for gaugino mass relation, we will explore how to distinguish the different supersymmetry breaking mediation mechanism and supersymmetric GUTs.