关键词: CMS Deep learning Higgs boson Jet energy Jet resolution b jets

来  源:   DOI:10.1007/s41781-020-00041-z   PDF(Sci-hub)   PDF(Pubmed)

Abstract:
We describe a method to obtain point and dispersion estimates for the energies of jets arising from b quarks produced in proton-proton collisions at an energy of s = 13 TeV at the CERN LHC. The algorithm is trained on a large sample of simulated b jets and validated on data recorded by the CMS detector in 2017 corresponding to an integrated luminosity of 41 fb - 1 . A multivariate regression algorithm based on a deep feed-forward neural network employs jet composition and shape information, and the properties of reconstructed secondary vertices associated with the jet. The results of the algorithm are used to improve the sensitivity of analyses that make use of b jets in the final state, such as the observation of Higgs boson decay to b b ¯ .
摘要:
我们描述了一种方法,该方法可以获得在CERNLHC上以s=13TeV的能量在质子-质子碰撞中产生的b夸克产生的射流能量的点和色散估计值。该算法是在大量模拟b射流样本上进行训练的,并在CMS探测器2017年记录的数据上进行了验证,该数据对应于41fb-1的综合光度。基于深度前馈神经网络的多元回归算法利用射流成分和形状信息,以及与射流相关的重建次顶点的属性。该算法的结果用于提高分析的灵敏度,利用b射流在最终状态,如观察希格斯玻色子对bb的衰变。
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