Predictions for low energy observables from string theory, supersymmetry and extra dimensions

理解最小尺度和最高能量下的物理是粒子理论家目前面临的主要挑战之一。虽然我们理解了电弱尺度下的粒子和相互作用，但理论问题仍然存在。特别是，我们不理解标准模型之外的物理学是什么，它可以统一所有已知的力。最有希望的理论之一是弦理论，它可以在宇宙中最高可能的能量尺度上实现，或者在额外维度模型的情况下，在LHC实验将要测试的能量区域。该项目的目的是研究弦理论模型可能的低能量表现形式，这些模型可以在LHC上给出签名，在味道物理实验中，并可能对宇宙的演化产生影响。通过从理论的角度研究这些实验信号，有可能提取高能物理的信息，并试图确定标准模型之外的最终理论。该项目将涉及使用最先进的数学技术进行复杂的分析计算，并将借助计算机模拟进行数值研究。位于达勒姆的粒子物理现象学研究所（IPPP）在标准模型之外的物理学理论方面及其现象学特征方面具有杰出的专业知识，它是这个雄心勃勃的项目的理想场所。

Understanding the physics at the smallest scale and highest energy is one of the major challenges that particle theorists face at present. While we understanding the particles and the interactions at the electroweak scales, theoretical problems remain open. In particular, we do not understand what is the physics beyond the Standard Model which can unify all the known forces. One of the most promising theories is string theory which could be realised at the highest possible energy scales in the Universe or, in the case of extra-dimension models, at the energy regime which is going to be tested by the experiments at the LHC. The aim of this project is to study the possible low energy manifestations of the string theory models, which can give signatures at the LHC, in flavour physics experiments and can have had an impact on the evolution of the Universe. By studying these experimental signals from a theoretical point of view it is possible to extract information the high energy physics and try to identify the ultimate theory beyond the Standard Model. The project will involve complex analytical computations using state of the art mathematical techniques and will resort on numerical study with the aid of computer simulations. The Institute for Particle Physics Phenomenology (IPPP) in Durham, has an outstanding expertise in the theoretical aspects of physics beyond the Standard Model and on its phenomenological signatures and it is an ideal place for this ambitious project.