arXiv 1807.097362018-07hep-ph

通过LHC上矢量玻色子散射中的双Higgs产生探测Higgs自耦合

Probing the Higgs self-coupling through double Higgs production in vector boson scattering at the LHC

E. Arganda, C. Garcia-Garcia, M. J. Herrero

备注：: 18 figures (34 plots), 7 tables, 30 pages. Definitive version published in Nuclear Physics B 945 (2019) 114687 with enlarged discussion section
发表信息：: Nuclear Physics B 945 (2019) 114687
DOI：: 10.1016/j.nuclphysb.2019.114687

摘要：

在这项工作中，我们探讨的敏感性，希格斯自耦合$λ$在生产的两个希格斯玻色子通过矢量玻色子散射在大型强子对撞机。虽然这些产生通道，具体来说是$W^+W^- \to HH$和$ ZZ \to HH$，比胶子-胶子融合的速率低，但它们受益于树级过程，独立于顶级物理学，并且具有非常独特的运动学，可以获得非常干净的实验签名。这使得它们成为关于希格斯自耦合敏感性的竞争渠道。为了预测这种耦合的敏感性，我们首先研究了$λ$在子过程水平上的作用，无论是在标准模型中还是在标准模型之外，然后转移到LHC方案。我们首先描述了$pp\to HHjj$的情况下，然后提供定量结果的$λ$的值，可以探测在LHC矢量玻色子散射过程后，考虑希格斯玻色子衰变。我们主要关注$pp\to b\bar{b}b\bar{b}jj$，因为它具有最大的信号速率，并且还评论了其他通道的潜力，例如$pp\to b\bar{b}γγjj$，因为它们导致更干净，虽然更小的信号。我们的整个研究是针对质心能量为$\sqrt{s}=14$ TeV和各种未来预期的LHC光度进行的。

英文摘要：

In this work we explore the sensitivity to the Higgs self-coupling $λ$ in the production of two Higgs bosons via vector boson scattering at the LHC. Although these production channels, concretely $W^+W^- \to HH$ and $ ZZ \to HH$, have lower rates than gluon-gluon fusion, they benefit from being tree level processes, being independent of top physics and having very distinctive kinematics that allow to obtain very clean experimental signatures. This makes them competitive channels concerning the sensitivity to the Higgs self-coupling. In order to give predictions for the sensitivity to this coupling, we first study the role of $λ$ at the subprocess level, both in and beyond the Standard Model, to move afterwards to the LHC scenario. We characterize the $pp\to HHjj$ case first and then provide quantitative results for the values of $λ$ that can be probed at the LHC in vector boson scattering processes after considering the Higgs boson decays. We focus mainly in $pp\to b\bar{b}b\bar{b}jj$, since it has the largest signal rates, and also comment on the potential of other channels, such as $pp\to b\bar{b}γγjj$, as they lead to cleaner, although smaller, signals. Our whole study is performed for a center of mass energy of $\sqrt{s}=14$ TeV and for various future expected LHC luminosities.

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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