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Loop-induced Higgs boson decays into gauge bosons in radiative natural supersymmetry

Edilson A. Reyes R.*

  • *Contact author: edilson.reyes@unipamplona.edu.co

Phys. Rev. D 114, 055015 – Published 9 September, 2026

DOI: https://doi.org/10.1103/x2d3-fbrq

Abstract

In this article, we study loop-induced Higgs decays into gauge bosons within the framework of radiative natural supersymmetry. We reproduce the one-loop MSSM calculations for the Higgs partial decay widths into a Z boson-photon pair, two photons, and two gluons, providing the corresponding analytical expressions for the scattering amplitudes. We focus on the region of parameter space that maximizes the rare decay width of the process hZγ, and analyze the correlated predictions for the remaining Higgs decay channels. In the selected region of parameter space, the hZγ decay width is enhanced, reaching a maximum value of 7.5keV, while remaining compatible with the current combined ATLAS measurement. At the same time, this region satisfies current Higgs constraints from the hγγ and hgg channels. The diphoton mode remains close to the Standard Model expectation, with deviations at the level of 5%. The gluon channel exhibits a stronger sensitivity to the considered region of parameter space, leading to a moderate suppression of about 10% in the corresponding partial width.

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