U.S.-Switzerland Research: A Study of the Heavy Quark Content of b-Jets

美国-瑞士研究：b-喷流的重夸克含量研究

• 批准号: 0840037
• 负责人: Sally Seidel
• 金额: $ 1.49万
• 依托单位: University of New Mexico
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-12-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0840037&HistoricalAwards=false
• 关键词: U.S.; Switzerland; Research; Study; Heavy

This dissertation research will investigate the heavy quark content of b-quark jets produced in the ATLAS detector at CERN. The research will be conducted in collaboration with CERN Laboratory under the auspices of Dr. Maria Smizanska. This study will probe the fragmentation properties of b-jets with reconstructed charmed hadrons in their most efficiently detected decay modes. The analysis will use data streams sensitive to events containing muon + jet and Z + jet which will be captured by unbiased ATLAS triggers based on muon + jet and dimuon patterns in the ATLAS subdetectors. This will be the first test of the fragmentation models encoded in Monte Carlo generators against data at the energy frontier of the Large Hadron Collider. It will allow ATLAS to calibrate its energy scale. The reconstructed charm particle decays can be useful in disentangling the contribution of g-b anti-b splitting processes from single-b contributions. The correct fragmentation model is essential to the description of b-jet spectra and is consequently crucial for a proper subtraction of backgrounds to searches for new physics including the Higgs. This proposal will support the international dissertation research for one graduate student.

这项论文研究将调查CERN ATLAS探测器中B Quark喷气机的重夸克含量。 这项研究将在Maria Smizanska博士的主持下与CERN实验室合作进行。 这项研究将在最有效地检测到的衰减模式下探测具有重建魅力的黑龙的B-JET的碎片性能。该分析将使用对包含MUON + JET和Z + JET的事件敏感的数据流，这些事件将由基于Muon + Jet和Dimuon sub -dectectors中的无偏的地图集触发器捕获。这将是对蒙特卡洛发生器编码的碎片模型的第一次测试，以针对大型强子对撞机的能量前沿的数据。它将允许地图集校准其能量尺度。重建的魅力颗粒衰减可用于解散单B贡献中G-B抗B分裂过程的贡献。正确的分裂模型对于描述B-JET光谱是必不可少的，因此对于正确扣除背景对于搜索包括HIGG在内的新物理学至关重要。该建议将支持一名研究生的国际论文研究。