Automated Computation of One-loop Scattering Amplitudes

该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)提供资金的。有史以来最大、最强大的粒子对撞机--大型强子对撞机(LHC)--已经准备好在欧洲核子研究中心开始运行。这将对整个高能物理界提出一个巨大的挑战，无论是在实验方面还是理论方面。需要对大量数据进行处理、分析，然后与理论模型和预测进行比较。一方面，大型强子对撞机将深入测试当前粒子物理的标准模型(SM)，并寻找模型中预测的最后一个失踪的粒子--希格斯玻色子。另一方面，大型强子对撞机将为粒子物理学家提供首次探索TeV能量尺度的可能性，并有望为SM中没有包含的新现象提供证据。这项建议提出的研究工作的主要目标是开发新的理论工具，用于计算多粒子NLO散射幅度，以及直接计算解释大型强子对撞机结果所需的散射过程的理论预测。在过去的两年里，PI一直致力于有效地计算单圈散射幅度的问题。一种名为OPP还原的新方法已经开发出来。PI将使用创新的OPP方法来计算大型强子对撞机上感兴趣的过程的理论预测。PI还将优化用于执行计算的现有数字代码，以提高其效率和灵活性。然后他希望将单循环计算的整个过程自动化。更广泛的影响是许多。作为一台发现机器，大型强子对撞机将对媒体产生强大的影响。PI将组织公开演讲，不仅针对理科专业，还针对更广泛的社区。第一个报告将解释大型强子对撞机的主要特征以及粒子物理和宇宙学中当前模型的挑战。第二次介绍，最好是在大型强子对撞机活动的第二年，将在非常一般的水平上提供关于科学进展的最新情况。纽约市理工学院(CUNY)在教育在科学和工程领域代表性不足的少数群体方面发挥着主导作用。PI将为学生提供高质量的教学、资源和机会，让他们参与科学事业，在那里他们可以用他们在学习期间发展起来的技术技能做出贡献。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The largest and most powerful particle collider ever built, the Large Hadron Collider (LHC), is ready to start its operation at CERN. This will present a big challenge for the whole high energy physics community, both on the experimental and the theoretical side. A huge amount of data will need to be processed, analyzed and then compared with theoretical models and predictions. On the one hand the LHC will test in depth the current Standard Model (SM) of particle physics and search for the last missing particle predicted in the model, the Higgs boson. On the other hand, LHC will give particle physicists the possibility to explore the TeV energy scale for the first time and it will hopefully bring evidence for new phenomena that are not incorporated in the SM. The main objective of the research work presented in this proposal is the development of new theoretical tools for the calculation of multi-particle NLO scattering amplitudes, as well as the direct computation of theoretical predictions for scattering processes necessary for the interpretation of the results at the LHC. For the last two years, the PI has been working on the problem of calculating one-loop scattering amplitudes efficiently. A new method, known as OPP-reduction, has been developed. The PI will use the innovative OPP-method to compute theoretical predictions for processes of interest at the LHC. The PI will also optimize the existing numerical codes used to perform the calculations, in order to improve their efficiency and flexibility. He then hopes to automate the whole process for one-loop computations.The broader impacts are many. As a discovery machine, LHC will have a strong impact on the media. The PI will organize public presentations, not only directed to science major but to the broader community. A first presentation will explain the main features of the LHC and the challenges of the current models in particle physics and cosmology. A second presentation, ideally during the second year of activity of the LHC, will give an update on the scientific progress, at a very general level. The New York City College of Technology (CUNY) plays a leading role in the education of minorities underrepresented in the sciences and engineering. The PI will provide high-quality teaching, resources, and possibilities for students to participate in the scientific enterprise, where they can contribute with the technical skills that they developed during their studies.