Two-loop BSM contributions to Higgs pair production in the aligned THDM

2025/08/15 by Degrassi, Giuseppe, Gröber, Ramona, Slavich, Pietro
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2508.11539

Abstract

We study the impact of the two-loop corrections controlled by the BSM Higgs couplings on the cross section for the production of a pair of SM-like Higgs bosons via gluon fusion in the aligned THDM. To this aim, we reassess the two-loop calculation of λ_hhh, we compute for the first time the two-loop corrections to λ_hhH, and we include the relevant corrections to the Higgs-gluon couplings and to the s-channel propagators entering the gg → hh amplitude. We discuss the numerical impact of the two-loop BSM contributions, first on the individual couplings and then on the prediction for the pair-production cross section, in two benchmark scenarios for the aligned THDM.

Citations

• Generic two-loop results for trilinear and quartic scalar self-interactions
• On the two-loop BSM corrections to h\longrightarrow γγ in a triplet extension of the SM
• Higgs Pair Production in the 2HDM: Impact of Loop Corrections to the Trilinear Higgs Couplings and Interference Effects on Experimental Limits
• On the two-loop BSM corrections to h\longrightarrowγγ in the aligned THDM
• Higgs Physics at the HL-LHC and HE-LHC
• Theory and phenomenology of two-Higgs-doublet models
• Low-Energy Theorems in Higgs Physics

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• Two-loop corrections to the Higgs trilinear coupling in BSM models with classical scale invariance