Sussex EPP 2012 Consolidated Grant Supplement

苏塞克斯实验粒子物理小组参与了粒子物理的三个方面：欧洲核子研究中心大型强子对撞机上的ATLAS实验；加拿大SNOLAB的SNO+中微子实验；以及法国inGrenoble的nEDM实验。这三个实验都探索了自然的一些最基本的特性，并试图为新的物理现象找到证据。苏塞克斯对ATLAS数据的分析做出了重要贡献，他在质子-质子相互作用中寻找超对称的证据，在这种相互作用中，电子、介子或tau在最终状态下产生。通过揭示宇宙中难以捉摸的暗物质的本质，超对称的发现将为新物理学提供证据，也可能为粒子物理学和宇宙学之间的联系提供证据。苏塞克斯还通过参与触发操作以及触发系统核心软件的开发和维护，对ATLAS触发系统（就像实验的“大脑”）做出了重要贡献。该集团还参与了未来升级theATLAS触发系统的准备工作。苏塞克斯在正在进行的中子电偶极矩（EDM）的研究中提供了实质性的智力领导。发现电火花场将代表超越SM的物理学的明确证据；相反，在我们所追求的灵敏度上，没有任何电火花加工，将对新物理模型提供极其严重的限制。这项工作还提供了与宇宙学的联系，因为任何中子EDM的大小都是由相同的cp违反机制决定的，这是宇宙中物质比反物质占优势的基础。苏塞克斯在SNO+实验中起着至关重要的作用，在那里它领导校准和数据流活动。该小组还参与了关键的无中微子双β衰变分析，这既可以确定中微子的质量，也可以回答中微子是否是自己的反粒子这个长期存在的问题。小组成员也在较小的层面上参与了直接搜索暗物质的新实验。

The Sussex Experimental Particle Physics group is involved in three strands of Particle Physics: the ATLAS experiment atCERN's Large Hadron Collider; the SNO+ neutrino experiment at SNOLAB in Canada; and the nEDM experiment at ILL inGrenoble, France. All three experiments probe some of the most fundamental properties of Nature and seek to findevidence for new physics phenomena.Sussex makes leading contributions to the analysis of ATLAS data, searching for evidence of supersymmetry in protonprotoninteractions where electrons, muons or taus are produced in the final state. The discovery of supersymmetry wouldprovide evidence for new physics as well as possibly a link between particle physics and cosmology, by uncovering thenature of the elusive Dark Matter in our universe. Sussex also makes important contribution to the ATLAS trigger system(which acts like the experiment's "brain") -- through participation in trigger operations and in the development andmaintenance core software for the trigger system. The group is also involved in preparations for future upgrades of theATLAS trigger system.Sussex provides substantial intellectual leadership in the ongoing search for an electric dipole moment (EDM) of theneutron. Finding an EDM would represent unambiguous evidence for physics beyond the SM; conversely, the absence ofany EDM, at the sensitivity for which we are aiming, would provide extremely severe constraints on models of new physics.This work also provides a link to cosmology, since the size of any neutron EDM is determined by the same CP-violatingmechanism that underlies the dominance of matter over antimatter in the Universe.Sussex plays a crucial role in the SNO+ experiment, where it leads the calibration and the dataflow activities. The group isalso becoming involved in the crucial neutrinoless double-beta decay analysis, which could both determine the mass of theneutrino and answer the long-standing question of whether the neutrino is its own antiparticle.Group members are also becoming involved, at a smaller level, in new experiments for direct Dark Matter searches.