Copy of Low-energy searches for symmetry violations and for particle physics beyond the Standard Model using neutrons, neutrinos and slow light

该计划主要使用小型、低能量实验来寻找和研究源自传统粒子物理标准模型(SM)之外的特征。其中包括中子的电偶极矩(CP破坏的SM参数化不令人满意地预测了一个比大多数其他模型，如超对称模型小许多个数量级的值)，洛伦兹不变性破坏(一些Grand United理论的一个特征)，中微子振荡的精确测量(它需要有限的中微子质量)，以及无中微子的双β衰变(这将要求中微子是所谓的Majorana粒子，即它们自己的反粒子)。这项提案中的所有项目都在各自的领域处于世界领先地位，尽管与更多基于对撞机的粒子物理项目相比，成本非常低。这项工作中的许多工作也提供了与宇宙学的重要联系，从而使我们更接近于了解我们的起源--例如，CP破坏是宇宙中物质凌驾于反物质之上的基础。这项工作将在不同的地点进行：苏塞克斯的中子EDM开发工作之后将在格勒诺布尔的ILL进行开发；MINOS主要位于费米拉布(芝加哥)，SNO在安大略省；SLAM将留在苏塞克斯；COBRA的总部设在意大利的格兰萨索。

This programme uses mostly small, low-energy experiments to look for and to study features originating beyond the traditional Standard Model (SM) of particle physics. These include an electric dipole moment of the neutron (for which the unsatisfactory SM parameterisation of CP violation predicts a value many orders of magnitude smaller than most other models such as Supersymmetry), Lorentz invariance violation (a feature of some Grand Unified Theories), precision measurements of neutrino oscillations (which require a finite neutrino mass), and neutrinoless double-beta decay (which would require neutrinos to be so-called Majorana particles, i.e. their own antiparticles). All of the projects in this proposal are, or can expect to be, world leading in their respective areas, despite being very low-cost in comparison with more 'traditional' collider-based particle physics projects. Much of this work also provides a vital link to cosmology, thus bringing us closer to an understanding of our origins -- for example, CP violation underlies the dominance of matter over antimatter in the Universe.The work is to be carried out in a variety of locations: neutron EDM development work at Sussex is to be followed by exploitation at the ILL in Grenoble; MINOS is situated primarily at Fermilab (Chicago), and SNO in Ontario; SLAM will stay at Sussex; COBRA is based at Gran Sasso, Italy.