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arXiv 1811.12366hep-ph
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强子对撞机上通过双希格斯玻色子玻色子产生探测标量势

Probing the scalar potential via double Higgs boson production at hadron colliders

Sophia Borowka, Claude Duhr, Fabio Maltoni, Davide Pagani, Ambresh Shivaji, Xiaoran Zhao

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35 pages, 18 figures, 2 tables
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摘要：

本文研究了强子对撞机上胶子聚变产生双希格斯粒子过程中三次和四次自耦合的灵敏度。考虑到标准模型有效场论中的相关算子，我们计算了直到两圈水平的主要贡献，其中第一个依赖于四次相互作用。我们的方法可以研究两个自耦合的独立变化，并清楚地确定所需的条款，以满足规范不变性，并获得UV有限的结果顺序在微扰理论。我们专注于$b \bar b γγ$签名为简单起见，并提供预期的边界在14 TeV的LHC与3000 FB $^{-1}$（HL-LHC）和未来的100 TeV对撞机（FCC-100）与30 ab $^{-1}$的三次和四次自耦合。我们发现，虽然HL-LHC将提供非常有限的灵敏度上的四次自耦合，双希格斯生产在FCC-100的精确测量将提供机会，以设置有竞争力的界限。我们表明，结合信息从双和三重希格斯生产导致显着改善的前景，确定四次自耦合。

英文摘要：

We present a sensitivity study on the cubic and quartic self couplings in double Higgs production via gluon fusion at hadron colliders. Considering the relevant operators in the Standard Model Effective Field Theory up to dimension eight, we calculate the dominant contributions up to two-loop level, where the first dependence on the quartic interaction appears. Our approach allows to study the independent variations of the two self couplings and to clearly identify the terms necessary to satisfy gauge invariance and to obtain UV-finite results order by order in perturbation theory. We focus on the $b \bar b γγ$ signature for simplicity and provide the expected bounds for the cubic and quartic self couplings at the 14 TeV LHC with 3000 fb$^{-1}$ (HL-LHC) and for a future 100 TeV collider (FCC-100) with 30 ab$^{-1}$. We find that while the HL-LHC will provide very limited sensitivity on the quartic self coupling, precision measurements of double Higgs production at a FCC-100 will offer the opportunity to set competitive bounds. We show that combining information from double and triple Higgs production leads to significantly improved prospects for the determination of the quartic self coupling.

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