Search for the production of dark Higgs in the framework of Mono-Z$^{\prime}$ portal at the FCC-ee simulated electron-positron collisions at $\sqrt{s} = 240$ GeV

TL;DR

This paper investigates the potential production of dark Higgs bosons via a Mono-Z' portal at FCC-ee, using simulated electron-positron collision data to set limits on dark Higgs mass if no new physics is observed.

Contribution

It introduces a study of dark Higgs production through a simplified Mono-Z' model at FCC-ee with detailed simulation and analysis methods.

Findings

Set 95% CL upper limits on dark Higgs mass

Analyzed dimuon plus missing energy events at 240 GeV

Simulated FCC-ee data with 10.8 ab^{-1} luminosity

Abstract

In the present work, we study the possible production of the dark Higgs boson ($h_{D}$) candidates, which originated from a simplified-model scenario based on the Mono-Z$^{\prime}$ model, in association with a neutral gauge boson (Z$^{\prime}$). This study has been performed by studying events with dimuon plus missing transverse energy produced in the simulated electron-positron collisions at the foreseen Future Circular Collider in the Electron-Positron collision mode (FCC-ee), operating at 240 GeV center of mass energy and integrated luminosity of 10.8 ab$^{-1}$. In case no new physics has been discovered, we set upper limits at a 95\% confidence level on the mass of the dark Higgs.