Study of the process: pp→Z0Z0→μ+μ-μ+μ- at CMS

• Main Authors: Yu-ming Hsu, 許峪銘
• Other Authors: Willis T. Lin
• Format: Others
• Language: en_US
• Online Access: http://ndltd.ncl.edu.tw/handle/wy4rkx

碩士 === 國立中央大學 === 物理研究所 === 96 === The Higgs Mechanism, which explains the origin of mass of elementary particles in general and of the W± and Z0 bosons in particular, was theorized in 1964 by Peter Higgs. Before 2008, there has been not any experiment which can directly detect the Higgs particle. However, this situation may change with the operation of the Large Hadron Collider at CERN which is going to start in 2008. The pp→Z0Z0→μ+μ-μ+μ- process studied at Large Hadron Collider is one of the background processes for searching the signal Higgs boson decaying processes. The study of this process will help to distinguish the Higgs boson decaying process from other background processes. In order to be more precise to analyze the real-data samples, it is important to develop a reasonable set of analyzing steps. From the contents of this thesis, the CMS potential for the observation and study of the pp→Z0Z0→μ+μ-μ+μ- process is provided with fully-simulated signal and background Monte-Carlo data samples. From the final results of the data analysis in the experiment, there are about 5.98 pp→Z0Z0→μ+μ-μ+μ- signal events with 0.53 background events per fb-1 expected, where the background is dominated mainly by the process (0.15events/ fb-1) with four final-state muons.