Effective Field Theory for Hadronic Physics

欧洲核子研究中心（CERN）的大型强子对撞机（LHC）目前正在实验可及的最小距离上研究物质的性质。通过高能质子对撞，物理学家可以在质子大小的万分之一的距离上探测物理世界的细节，通过研究这些碰撞的碎片，他们能够推断出新的亚原子粒子和力的存在，比如最近发现的希格斯玻色子。由于质子-质子碰撞是非常复杂的事件，为了将探测器测量到的信号与碰撞中的微观物理细节联系起来，需要进行大量的理论工作。特别是，在碰撞中产生的称为夸克和胶子的亚原子粒子在撞击探测器时变成了高能粒子射流。计算这一过程的细节，从而从测量中推断出短距离碰撞的性质，是一项具有挑战性的任务。

The Large Hadron Collider (LHC) at CERN is currently studying the nature of matter at the smallest experimentally accessible distances. By colliding protons at high energies, physicists probe the details of the physical world at distances of order 1/10,000th the size of the proton, and by studying the debris of these collisions they are able to infer the existence of new subatomic particles and forces, such as the recently-discovered Higgs Boson. Because proton-proton collisions are incredibly complex events, a great deal of theoretical work is required in order to relate the signals measured in detectors to the details of the microscopic physics in the collision. In particular, subatomic particles called quarks and gluons produced in the collisions turn into energetic jets of particles by the time they hit the detectors. Calculating the details of this process, and hence inferring the properties of the short-distance collision from the measurements, is a challenging task.