SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 134: Higgs, Di-Higgs IV

T 134.5: Vortrag

Donnerstag, 23. März 2023, 18:30–18:45, HSZ/0105

Sensitivity to Triple Higgs Couplings via Di-Higgs Production in the 2HDM at the (HL-)LHC — Francisco Arco^1,2, Sven Heinemeyer², Margarete Muhlleitner³, and •Kateryna Radchenko⁴ — ¹UAM, Spain — ²IFT (UAM-CSIC), Spain — ³KIT, Germany — ⁴DESY, Germany

The reconstruction of the Higgs potential is a major goal for experimental particle physics. This can be accomplished via the precise measurement of the Higgs mass and its self interactions. The first process that provides access to the trilinear self-coupling is Higgs pair production, which at the LHC happens dominantly trough gluon fusion. In this context, models with extended Higgs sectors are theoretically and experimentally allowed and can accommodate large deviations of the trilinear Higgs couplings while providing explanations to some of the shortcomings of the Standard Model.

We study the sensitivity to the triple Higgs couplings involved in Higgs pair production via gluon fusion in the framework of the Two Higgs Doublet Model. In particular, we focus on the contribution of the resonant diagram involving a heavy CP-even Higgs boson exchange to the total production cross section as well as the invariant mass distribution of two Higgses in the final state. We show that for the benchmark scenarios where the resonant production is dominant, there is significant sensitivity to the parameters of the extra scalar. Finally, we discuss the effects of experimental uncertainties by applying smearing and binning to our results.