Research in particle physics phenomenology

在大型强子对撞机上，质子以前所未有的能量进行碰撞，以解开自然界的基本问题，例如质量的起源是什么，物质是由什么组成的，或者描述自然的基本理论是什么？要回答这些问题，最重要的是能够从大的标准模型背景中分离出由新物理引起的罕见信号事件。大多数提出的新物理方案导致许多物体处于最终状态的签名，例如喷流和轻子。然而，由于碰撞能量很大，标准模型过程很可能产生具有许多喷流和轻子的最终态。因此，这些背景的精确计算对于寻找新粒子和测量新粒子的性质具有重要意义。这个理论项目的目的是通过包括矢量玻色子和许多喷流来改善对生产过程的预测。为此，计算中必须包括次首阶（NLO）校正。常用的工具是灵活的蒙特卡罗程序。由于其直接的重要性，在大型强子对撞机的实验测量与实验合作的强烈互动是预期的。

At the Large Hadron Collider protons are brought into collision with unprecedented energy to unravel fundamental questions of nature, e.g. what is the origin of mass, what is matter made of or what is the basic underlying theory to describe nature? To answer these questions it is of paramount importance to be able to separate rare signal events, induced by new physics, from the large Standard Model backgrounds. Most of the proposed new physics scenarios result in signatures with many objects in the final state, e.g. jets and leptons. However, because of the large collision energy Standard Model processes are likely to produce final states with many jets and leptons as well. Therefore, a precise calculation of these backgrounds is important for searches of new particles and measurements of new particle's properties. The aim of this theoretical project is to improve predictions for production processes by including vector bosons and many jets. For this purpose next-to-leading order (NLO) corrections have to be included in the calculation. The tool commonly used are flexible Monte Carlo programs. Because of its immediate importance for measurements at the LHC's experiments a strong interaction with experimental collaborations is expected.