This Chapter is organized into three main Sections. The discussion starts with the introduction of the Standard Model (SM), its properties, and the all-important Brout-Englert-Higgs (BEH) mechanism. The second Section highlights the importance of HH production within the SM and possible beyond the SM (BSM) scenarios. The last Section covers the experimental approaches employed in the searches for Higgs boson pair (HH) production at the LHC. The SM of particle physics [1, 2] represents the current best physical understanding of the subatomic world. The SM is constructed as a renormalizable quantum field theory with strict symmetry rules under gauge transformations. It accounts for all the fundamental forces of Nature, apart from gravity, and explains the existence and the categorization of the so-called fundamental particles. The SM has been developed and refined in the second half of the XX \({\text {th}}\) century via constant and back-to-back progress of theory and experimental results. During this time, the SM has been extensively corroborated, and multiple experiments in several different conditions precisely measured its predictions. The latest verification of the SM was the discovery of the Higgs boson by the ATLAS and CMS Collaborations at the CERN LHC, announced on July 4 \({\text {th}}\) 2012 [3–5]. Despite having huge and continued successes in providing experimental predictions, we know that the SM is not the ultimate theory as it cannot account for many experimental facts at different scales, from subatomic to cosmological and astrophysical observations. The presence of so-called physics BSM can be accounted for through different approaches, from introducing possible new fields to establishing new interactions within known particles. The Higgs field represents one important component in most approaches to BSM owing to its unique scalar nature. In this context, a deep understanding of the Higgs boson ( \(\text {H}\) ) and its properties represents the current most important objective of the high-energy physics community. Among the Higgs boson properties, its self-interaction is of utmost importance as it can shed light on the nature of the Electro-Weak Symmetry Breaking (EWSB) process. The HH production represents the best channel to perform such measurements at the LHC experiments. Moreover, as HH production is one of the processes with the smallest predicted cross section, BSM physics can appear through very large deviations in experimental results.

Higgs Boson Pair Production Theoretical Motivation

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发表日期：

2025年

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Jona Motta

摘要

This Chapter is organized into three main Sections. The discussion starts with the introduction of the Standard Model (SM), its properties, and the all-important Brout-Englert-Higgs (BEH) mechanism. The second Section highlights the importance of HH production within the SM and possible beyond the SM (BSM) scenarios. The last Section covers the experimental approaches employed in the searches for Higgs boson pair (HH) production at the LHC. The SM of particle physics [1, 2] represents the current best physical understanding of the subatomic world. The SM is constructed as a renormalizable quantum field theory with strict symmetry rules under gauge transformations. It accounts for all the fundamental forces of Nature, apart from gravity, and explains the existence and the categorization of the so-called fundamental particles. The SM has been developed and refined in the second half of the XX \({\text {th}}\) century via constant and back-to-back progress of theory and experimental results. During this time, the SM has been extensively corroborated, and multiple experiments in several different conditions precisely measured its predictions. The latest verification of the SM was the discovery of the Higgs boson by the ATLAS and CMS Collaborations at the CERN LHC, announced on July 4 \({\text {th}}\) 2012 [3–5]. Despite having huge and continued successes in providing experimental predictions, we know that the SM is not the ultimate theory as it cannot account for many experimental facts at different scales, from subatomic to cosmological and astrophysical observations. The presence of so-called physics BSM can be accounted for through different approaches, from introducing possible new fields to establishing new interactions within known particles. The Higgs field represents one important component in most approaches to BSM owing to its unique scalar nature. In this context, a deep understanding of the Higgs boson ( \(\text {H}\) ) and its properties represents the current most important objective of the high-energy physics community. Among the Higgs boson properties, its self-interaction is of utmost importance as it can shed light on the nature of the Electro-Weak Symmetry Breaking (EWSB) process. The HH production represents the best channel to perform such measurements at the LHC experiments. Moreover, as HH production is one of the processes with the smallest predicted cross section, BSM physics can appear through very large deviations in experimental results.