Higher-Order Corrections to Massive Particle Production at the Large Hadron Collider

该奖项资助纽约市立大学纽约城市理工学院的Andrea Ferroglia教授和Giovanni Ossola教授的研究活动。大型强子对撞机(LHC)的实验合作收集和分析的数据使物理学家能够实现LHC科学计划的第一个主要目标，即发现希格斯玻色子。在不久的将来，大型强子对撞机的主要目标将是研究这种新粒子的性质，并寻找当前粒子物理标准模型所不能描述的新现象的信号。理论家需要为测量到的可观测数据提供精确的预测。更多的理论挑战来自几个粒子处于终态的过程，以及大质量粒子的存在，如顶夸克和希格斯玻色子。PI是计算这些复杂过程的专家，这对于完全理解希格斯玻色子(以及可能在下一次大型强子对撞机中发现的任何其他粒子)的性质是必要的。该项目的目标是将最先进的技术工具用于计算QCD中的辐射修正，包括涉及真实和/或虚拟大质量粒子的过程，如希格斯玻色子、顶夸克对和夸克和胶子的有色超对称对对。对于许多观测数据来说，必须进行超出当前可用精度的计算。国际和平研究所计划采用并进一步发展单圈计算的GoSam框架、使他们能够直接在动量空间恢复大对数校正的有效场论方法，以及最近推出的多圈和多支费曼图的解析或数值计算方法。

This award funds the research activities of Professors Andrea Ferroglia and Giovanni Ossola at the New York City College of Technology of the City University of New York.The data collected and analyzed by the experimental collaborations at the Large Hadron Collider (LHC) allowed physicists to achieve the first main goal of the LHC scientific program, namely the discovery of the Higgs boson. In the near future, the primary goals of the LHC will be to study the properties of the new particle and to search for signals of new phenomena which are not described by the current Standard Model of particle physics. Theorists need to provide precise predictions for the measured observables. Additional theoretical challenges are provided by processes with several particles in the final state and by the presence of massive particles, such as top quarks and Higgs bosons. The PIs are experts in calculations of these complicated processes, which are necessary for fully understanding the properties of the Higgs boson (and any other particles that may be discovered in the next run of the LHC).The goal of the project is to apply the most advanced technical tools for the calculation of radiative corrections in QCD to processes involving real and/or virtual massive particles, such as Higgs bosons, top-quark pairs, and pairs of colored supersymmetric partners of quarks and gluons. For many observables, calculations which go beyond the currently available accuracy are necessary. The PI's plan to employ and further develop the GoSam framework for one-loop calculations, effective field theory methods which allow them to carry out the resummation of large logarithmic corrections directly in momentum space, and recently introduced methods for the analytic or numerical calculation of multiloop and multileg Feynman diagrams.