Search for the production of dark Higgs in the framework of Mono-Z^′ portal at the FCC-ee simulated electron-positron collisions at √(s) = 240 GeV

2026/02/28 by S. Elgammal, N. De Filippis
Physics and Astronomy · #hep-ph

paper · pdf

arxiv created 2026/08/06 · arxiv updated 2026/08/07

Abstract

We conducted a Monte Carlo search for dark Higgs particles (h_D), which is based on a model derived from the Mono-Z^′ portal. This model suggests the existence of h_D and a new neutral gauge boson, denoted as Z^′. Our study focused on the event topology featuring two oppositely charged muons and missing transverse energy, generated from simulations of e⁺ e^- collisions at the Future Circular Collider (FCC-ee). This collider is set to operate with 240 GeV a center-of-mass energy (√(s)), and will achieve an integrated luminosity of 10.8 ab^-1. In our analysis, we estimated upper limits on the mass of the dark Higgs at a 95% confidence level, assuming that no h_D particles were detected.

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