b-Jet Identification in the CMS Experiment
b-Jet Identification in the CMS Experiment
复制标题
CMS 实验中的 b-Jet 识别
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
T. Todorov
中科院分区：
文献类型：
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作者：
S. Cucciarelli;D. Kotlinski;M. Konecki;T. Todorov
在大型强子对撞机上，识别与b夸克产生有关的喷注是测量标准模型过程和寻找该模型以外的物理过程的重要工具。CMS实验开发了各种算法，使用带电粒子轨迹的撞击参数、重建衰变顶点的属性、轻子的存在或这些量的组合来选择具有不同b纯度的喷流样本。2011年记录的质子-质子碰撞对应的积分光度为4.7FB-1，用于将重建质量与模拟的预期进行比较。该算法在效率和误识率方面的性能已经从多喷流事件中进行了测量。
The identification of jets associated with the production of b quarks is an essential tool both for the measurement of standard-model processes and in the search for physics beyond this model at the Large Hadron Collider. The CMS experiment has developed a variety of algorithms that use the impact parameters of charged-particle tracks, the properties of reconstructed decay vertices, the presence of a lepton or combinations of these quantities to select samples of jets with different b purities. Proton-proton collisions recorded in 2011 and corresponding to an integrated luminosity of 4.7 fb-1 have been used to compare the quality of the reconstruction with expectations from simulation. The performance of the algorithms in terms of efficiency and misidentification probability has been measured from multijet events.