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使用多变量技术提高在[公式：见原文]末态下的希格斯对产生。

Boosting Higgs pair production in the [Formula: see text] final state with multivariate techniques.

作者信息

Behr J Katharina, Bortoletto Daniela, Frost James A, Hartland Nathan P, Issever Cigdem, Rojo Juan

机构信息

Physics Department, University of Oxford, 1 Keble Road, Oxford, UK.

出版信息

Eur Phys J C Part Fields. 2016;76(7):386. doi: 10.1140/epjc/s10052-016-4215-5. Epub 2016 Jul 8.

DOI:10.1140/epjc/s10052-016-4215-5
PMID:28280449
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5321478/
Abstract

The measurement of Higgs pair production will be a cornerstone of the LHC program in the coming years. Double Higgs production provides a crucial window upon the mechanism of electroweak symmetry breaking and has a unique sensitivity to the Higgs trilinear coupling. We study the feasibility of a measurement of Higgs pair production in the [Formula: see text] final state at the LHC. Our analysis is based on a combination of traditional cut-based methods with state-of-the-art multivariate techniques. We account for all relevant backgrounds, including the contributions from light and charm jet mis-identification, which are ultimately comparable in size to the irreducible 4 QCD background. We demonstrate the robustness of our analysis strategy in a high pileup environment. For an integrated luminosity of [Formula: see text] ab[Formula: see text], a signal significance of [Formula: see text] is obtained, indicating that the [Formula: see text] final state alone could allow for the observation of double Higgs production at the High Luminosity LHC.

摘要

希格斯玻色子对产生的测量将成为未来几年大型强子对撞机（LHC）计划的基石。双希格斯玻色子产生为弱电对称性破缺机制提供了一个关键窗口，并且对希格斯三线性耦合具有独特的敏感性。我们研究了在大型强子对撞机的[公式：见正文]末态中测量希格斯玻色子对产生的可行性。我们的分析基于传统的基于切割的方法与最先进的多变量技术的结合。我们考虑了所有相关背景，包括来自轻夸克和粲夸克喷注误识别的贡献，其最终大小与不可约的4 QCD背景相当。我们展示了我们的分析策略在高堆积环境中的稳健性。对于积分亮度为[公式：见正文] ab[公式：见正文]，获得了[公式：见正文]的信号显著性，这表明仅[公式：见正文]末态就可以在高亮度大型强子对撞机上实现双希格斯玻色子产生的观测。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1467/5321478/b006f8cdeb17/10052_2016_4215_Fig22_HTML.jpg
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