Abstract
We show how effects of compositeness emerging in a Composite 2-Higgs Doublet Model can enter Standard Model (SM)-like Higgs boson 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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Acknowledgments
The work of FE and MM is supported by the BMBF-Project 05H21VKCCA. SM is supported in part through the NExT Institute, the STFC Consolidated Grant No. ST/L000296/1 and the Knut and Alice Wallenberg foundation under the grant KAW 2017.0100. KS is supported by JSPS KAKENHI Grant No. 20H01894, No. 23KJ0086, and the National Science Centre, Poland, under research Grant No. 2020/38/E/ST2/00243. The work of L.D.R. has been partly funded by the European Union – Next Generation EU through the research grant number P2022Z4P4B “SOPHYA - Sustainable Optimised PHYsics Algorithms: fundamental physics to build an advanced society” under the program PRIN 2022 PNRR of the Italian Ministero dell’Università e Ricerca (MUR) and partially supported by 24 ICSC – Centro Nazionale di Ricerca in High Performance Computing, Big Data and Quantum Computing.
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De Curtis, S., Rose, L.D., Egle, F. et al. Composite 2-Higgs doublet model: strong effects on Higgs pair production. J. High Energ. Phys. 2024, 63 (2024). https://doi.org/10.1007/JHEP06(2024)063
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DOI: https://doi.org/10.1007/JHEP06(2024)063