Perturbative QCD and the LHC phenomenology

微扰 QCD 和 LHC 现象学

• 批准号: 0855365
• 负责人: Kirill Melnikov
• 金额: $ 45万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0855365&HistoricalAwards=false
• 关键词: Perturbative; QCD; LHC; phenomenology

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."Physics at the Large Hadron Collider (LHC) will offer unprecedented opportunities to study and answer fundamental questions in particle physics. Discoveries at the LHC will give us the first look at the physics beyond the Standard Model, the subject of many speculations in the past. Those discoveries will set the direction for further developments in particle physics and will have a very broad impact on our understanding of physics in general. The goal of the PI's research is to establish convincingly the presence of New Physics at the LHC and to elucidate its origin. Because the LHC is a hadron collider, every bit of physics there depends on Quantum Chromodynamics (QCD), the theory that is used to predict an outcome of hadronic collisions. For the LHC purposes, QCD is perturbative but very complex. A better understanding of QCD is required to achieve the high goals of the LHC. The PI proposes to study and solve two outstanding problems related to QCD applications to the LHC physics: i) nextto-leading order (NLO) QCD computations for processes with large number of external particles and ii) the development of practical methods for next-to-nextto-leading order (NNLO) QCD computations for hard scattering processes at hadron colliders. The PI expects that these methods will find applications in other areas of particle phenomenology; to this end, he plans to pursue some studies in heavy quark physics as well. The broader impact of the proposed research derives from its importance for the success of the LHC physics program. Good understanding of QCD is required to extract unbiased information about physics beyond the Standard Model from the LHC data. The development of new computational methods envisioned in this proposal should open up the possibility to improve theoretical description of hard scattering processes at the LHC thereby leading to new opportunities for experimental analyses and the discovery and the investigation of New Physics. An integral part of the project will be collaboration with and the training of graduate students and postdoctoral fellows.

这个奖项是根据2009年美国复苏和再投资法案(公共法律111-5)资助的。大型强子对撞机(LHC)的物理学将提供前所未有的机会来研究和回答粒子物理学中的基本问题。大型强子对撞机的发现将使我们第一次看到超越标准模型的物理学，这是过去许多猜测的主题。这些发现将为粒子物理学的进一步发展确定方向，并将对我们对物理学的总体理解产生非常广泛的影响。PI的研究目标是令人信服地确定大型强子对撞机上存在新物理学，并阐明其起源。因为LHC是一个强子对撞机，所以那里的每一点物理都依赖于量子色动力学(QCD)，这一理论被用来预测强子碰撞的结果。对于大型强子对撞机来说，QCD是微扰的，但非常复杂。为了实现大型强子对撞机的高目标，需要对QCD有更好的理解。PI建议研究和解决与QCD在LHC物理中的应用有关的两个悬而未决的问题：i)用于含有大量外部粒子的过程的次前级(NLO)QCD计算和ii)发展用于强子对撞机硬散射过程的次前级(NNLO)QCD计算的实用方法。国际和平研究所希望这些方法将在粒子现象学的其他领域得到应用；为此，他计划继续在重夸克物理方面进行一些研究。这项拟议研究的更广泛影响来自于它对大型强子对撞机物理计划成功的重要性。要从大型强子对撞机的数据中提取超越标准模型的物理信息，就需要对QCD有很好的理解。这项提议中设想的新计算方法的发展应该为改进大型强子对撞机硬散射过程的理论描述开辟了可能性，从而为实验分析和新物理的发现和研究带来了新的机会。该项目的一个组成部分将是与研究生和博士后研究员合作并对他们进行培训。