The ATLAS Experiment at the CERN LHC

CERN LHC 的 ATLAS 实验

• 批准号: SAPPJ-2015-00030-6
• 负责人: Leroy, Claude
• 金额: $ 30.23万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Subatomic Physics Envelope - Project
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=614416
• 关键词: ATLAS; Experiment; CERN; LHC

The CERN Large Hadron Collider (LHC) has the highest direct energy reach of any particle physics facility, and Canada's central role in the ATLAS collaboration at the LHC will keep us at the forefront of international particle physics. ATLAS and the LHC conducted our first major operational period, called Run 1, in 2011 and 2012, with proton-proton collision centre-of-mass energies of 7-8 TeV. With those data, ATLAS, together with the CMS collaboration, discovered the Higgs boson whose existence was predicted in 1964 and intensely sought over the intervening half century. The Higgs discovery was covered widely by International and Canadian media and led directly to the award of the 2013 Nobel prize in physics to Peter Higgs and Francois Englert. Studies of the properties of the newly observed Higgs particle have so far shown it to be consistent with the Standard Model Higgs, but the limited number of Higgs particles observed at the LHC restrict the sensitivity of the results. Canadians played leading roles in several of the analyses used to discover the Higgs boson and to measure its properties, including the current coordination of the ATLAS Higgs working group. The Higgs boson discovery was a remarkable achievement, but only scratches the surface of the potential physics reach of ATLAS and the LHC, which were designed from the outset to probe for signatures of new physics at the TeV scale that could "stabilize" the vacuum and address deficiencies of the Standard Model. Achieving the full potential of ATLAS requires more data at higher energies. The three-year running period covered by this project grant request, Run 2 from spring 2015 to spring 2018, will see the higher luminosities and energies required to push our understanding of matter and energy beyond the Standard Model. This is the most critical running period for pushing our knowledge beyond the Standard Model. Support of Canadian ATLAS operations over the coming three years will ensure that we reap the benefits from our significant investment in ATLAS and the LHC, extracting maximal and diverse physics output while training the next generation of Canadian particle physicists. ATLAS and the LHC are designed to directly address some of the most compelling questions in science. Even with the Higgs observed, the Standard Model is problematic if no new physics with electroweak couplings is present below about 1 TeV, and ATLAS and the LHC will definitively explore this region in Run-2 and discover the physics beyond the Standard Model that seems to lurk just within our reach. With ATLAS and the LHC engaged in collision operations, the ATLAS-Canada request will be focused on detector and computing operations and physics analysis. The request includes postdoctoral fellow and student support, travel to CERN for expert activities and physics meetings, CERN subsistence for CERN-based personnel, and travel for physics meetings and conferences.

欧洲核子研究中心大型强子对撞机（LHC）拥有所有粒子物理设施中最高的直接能量范围，加拿大在大型强子对撞机ATLAS合作中的核心作用将使我们保持在国际粒子物理学的最前沿。ATLAS和LHC在2011年和2012年进行了我们的第一个主要运行期，称为运行1，质子-质子碰撞质心能量为7-8 TeV。利用这些数据，ATLAS与CMS合作发现了希格斯玻色子，希格斯玻色子的存在在1964年被预测，并在此后的半个世纪中受到了强烈的追求。希格斯的发现被国际和加拿大媒体广泛报道，并直接导致2013年诺贝尔物理学奖授予彼得·希格斯和弗朗索瓦·恩格勒。迄今为止，对新观测到的希格斯粒子的性质的研究表明，它与标准模型希格斯粒子是一致的，但在LHC上观测到的希格斯粒子数量有限，限制了结果的灵敏度。加拿大人在用于发现希格斯玻色子和测量其性质的几项分析中发挥了主导作用，包括ATLAS希格斯工作组目前的协调工作。希格斯玻色子的发现是一项了不起的成就，但只是触及了ATLAS和LHC潜在物理学范围的表面，这两个系统从一开始就被设计用于探测TeV尺度的新物理学特征，这些物理学特征可以“稳定”真空并解决标准模型的缺陷。实现ATLAS的全部潜力需要在更高的能量下获得更多的数据。 该项目资助申请所涵盖的三年运行期，即从2015年春季到2018年春季的运行2，将看到更高的光度和能量，以推动我们对物质和能量的理解超越标准模型。这是推动我们的知识超越标准模型的最关键的运行时期。在未来三年内，对加拿大ATLAS运营的支持将确保我们从对ATLAS和LHC的重大投资中获益，提取最大和多样化的物理输出，同时培训下一代加拿大粒子物理学家。ATLAS和LHC旨在直接解决科学中一些最引人注目的问题。即使观察到希格斯粒子，如果在1 TeV以下没有新的电弱耦合物理，标准模型也是有问题的，ATLAS和LHC将在Run-2中明确探索这一区域，并发现标准模型之外的物理，似乎潜伏在我们的范围内。 由于ATLAS和LHC正在进行碰撞操作，ATLAS-加拿大的请求将侧重于探测器和计算操作以及物理分析。请求提供的经费包括博士后研究员和学生支助、前往欧洲核子研究中心参加专家活动和物理会议的旅费、欧洲核子研究中心人员的生活津贴以及参加物理会议的旅费。