论文标题

LHC触发器的标准化自动编码器

A Normalized Autoencoder for LHC Triggers

论文作者

Dillon, Barry M., Favaro, Luigi, Plehn, Tilman, Sorrenson, Peter, Krämer, Michael

论文摘要

自动编码器是LHC的有效分析工具,因为它们代表了超出标准模型以外的物理学的主要目标之一。关键的挑战是,基于功能的可压缩性不适用于LHC,而现有的基于密度的搜索则缺乏性能。我们提出了第一个自动编码器,该自动编码器在较高和较低的复杂性方向上对称地识别异常的喷气机。标准化的自动编码器结合了标准瓶颈结构,并具有明确的概率描述。它比所有可用的自动编码器用于顶级与QCD喷气机的效果更好,并可靠地标识了不同的深色射流信号。

Autoencoders are an effective analysis tool for the LHC, as they represent one of its main goal of finding physics beyond the Standard Model. The key challenge is that out-of-distribution anomaly searches based on the compressibility of features do not apply to the LHC, while existing density-based searches lack performance. We present the first autoencoder which identifies anomalous jets symmetrically in the directions of higher and lower complexity. The normalized autoencoder combines a standard bottleneck architecture with a well-defined probabilistic description. It works better than all available autoencoders for top vs QCD jets and reliably identifies different dark-jet signals.

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