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arXiv · 2310.10471

Composite 2-Higgs Doublet Model: Strong Effects on Higgs Pair Production

Stefania De Curtis·Luigi Delle Rose·Felix Egle·Stefano Moretti·Margarete Mühlleitner·Kodai Sakurai
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Abstract

We show how effects of compositeness emerging in a Composite 2-Higgs Doublet Model can enter Standard Model (SM)-like Higgs pair production at the Large Hadron Collider in both resonant and non-resonant mode. Such effects can arise from modified trilinear Higgs self-couplings and top-Yukawa couplings as well as from loops of new heavy quarks and additional quartic Higgs-fermion interactions. In the resonant case, significant distortions of the Breit- Wigner shape of a new scalar state decaying into the two SM-like Higgs states may occur due to interference effects amongst not only the SM-like diagrams but also those involving the new heavy quarks. In the non-resonant case, a modification of the underlying line-shape and a local maximum at twice a new heavy quark mass appear simultaneously. We quantify these effects by taking into account the relevant theoretical and latest experimental bounds.

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Stefania De Curtis, Luigi Delle Rose, Felix Egle, Stefano Moretti, Margarete Mühlleitner, Kodai Sakurai. 2023-10-16. Composite 2-Higgs Doublet Model: Strong Effects on Higgs Pair Production. https://doi.org/10.1007/jhep06(2024)063

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