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arXiv 1908.08959hep-phhep-ex
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Mass Agnostic Jet Taggers

Mass Agnostic Jet Taggers

Layne Bradshaw, Rashmish K. Mishra, Andrea Mitridate, Bryan Ostdiek

摘要:

在大数据集中寻找新的物理需要在两个相互竞争的效应之间取得平衡-信号识别与背景失真。在这项工作中,我们进行了系统的研究,单变量和多变量射流标记方法,旨在实现这种平衡。该方法通过增强训练过程或数据本身来保持背景分布的形状。多个定量指标比较的方法被认为是,标记2-,3-,或4-prong射流从QCD背景。这是第一项研究表明,基于规划和PCA的缩放的数据增强技术与对抗性NN和uBoost的增强训练技术具有相似的性能,但更容易实现,计算成本更低。

英文摘要:

Searching for new physics in large data sets needs a balance between two competing effects---signal identification vs background distortion. In this work, we perform a systematic study of both single variable and multivariate jet tagging methods that aim for this balance. The methods preserve the shape of the background distribution by either augmenting the training procedure or the data itself. Multiple quantitative metrics to compare the methods are considered, for tagging 2-, 3-, or 4-prong jets from the QCD background. This is the first study to show that the data augmentation techniques of Planing and PCA based scaling deliver similar performance as the augmented training techniques of Adversarial NN and uBoost, but are both easier to implement and computationally cheaper.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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