article · Journal of High Energy Physics
This research provides an extensive analysis of Higgs boson pair production across several extended theoretical frameworks, including real and complex two-Higgs-doublet models, singlet-extended variations, and the next-to-minimal supersymmetric Standard Model. By applying existing theoretical parameters alongside current experimental constraints, the study determines the viable cross sections for producing pairs of Standard Model-like and non-Standard Model-like Higgs bosons. It also maps out permissible ranges for Yukawa couplings and trilinear Higgs self-couplings. The findings demonstrate that Higgs pair production in these extended frameworks can significantly exceed Standard Model expectations through both resonant and non-resonant processes. Selected benchmark scenarios highlight notable theoretical phenomena, including potential tests for charge-parity violation, cascade decays between Higgs states, and rates where pair production surpasses single production. Incorporating higher-order quantum chromodynamic corrections further demonstrates an increase in cross sections by factors between 1.79 and 2.24.
Understanding how Higgs bosons interact and whether additional Higgs states exist are central questions in fundamental particle physics. By establishing clear benchmarks and boundaries across multiple theoretical extensions of the Standard Model, this work aids experimental physicists in designing targeted searches at high-energy particle colliders, ultimately helping to determine the precise mechanisms governing fundamental mass and electroweak symmetry breaking.
The abstract does not indicate an application pathway, as this research represents early-stage fundamental theoretical particle physics intended to guide experimental collider searches.
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A bstract We present a comprehensive study on Higgs pair production in various archetypical extended Higgs sectors such as the real and the complex 2-Higgs-Doublet Model, the 2-Higgs-Doublet Model augmented by a real singlet field and the Next-to-Minimal Supersymmetric extension of the Standard Model. We take into account all relevant theoretical and experimental constraints, in particular the experimental limits on non-resonant and resonant Higgs pair production. We present the allowed cross sections for Standard Model (SM)-like Higgs pair production and the ranges of the SM-like Yukawa and trilinear Higgs self-coupling that are still compatible with the applied constraints. Furthermore, we give results for the pair production of a SM-like with a non-SM-like Higgs boson and for the production of a pair of non-SM-like Higgs bosons. We find that di-Higgs production in the models under investigation can exceed the SM rate substantially, not only in the non-resonance region but also due to resonant enhancement. We give several benchmarks with interesting features such as large cross sections, the possibility to test CP violation, Higgs-to-Higgs cascade decays or di-Higgs production beating single Higgs production. In all of our benchmark points, the next-to-leading order QCD corrections are included in the large top-mass limit. For these points, we found that, depending on the model and the Higgs pair final state, the corrections increase the leading order cross section by a factor of 1.79 to 2.24. We also discuss the relation between the description of Higgs pair production in an effective field theory approach and in the specific models investigated here.
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DOI: 10.1007/jhep09(2022)011
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