Z-dark search with the ATLAS detector

TL;DR

This paper summarizes recent ATLAS results on searching for a hypothetical dark sector boson, Z-dark, through Higgs decay channels at the LHC, providing insights into potential new physics beyond the Standard Model.

Contribution

It reports the latest experimental search results for Z-dark bosons in Higgs decay channels using ATLAS data at 8 TeV, advancing the experimental constraints on hidden sector particles.

Findings

No significant Z-dark signal observed

Set new upper limits on Z-dark production

Constrain models of hidden sector physics

Abstract

The search of the "hidden sector" via new neutral light bosons Z-dark ($Z_{d}$) could be revealed by the study of the decay of the discovered Higgs-like boson or any other undiscovered Higgs boson. After the LHC concluded a successful first period of running, the ATLAS Collaboration published its latest results on the $H\rightarrow Z_{d}Z_{d}\rightarrow 4l$ analysis using up to 20 fb$^{-1}$ of integrated luminosity at $\sqrt{s}=8$ TeV. In this proceeding I present a summary of the recent results on the search of the $Z_{d}$ in the signature $H\rightarrow Z_{d}Z_{d}\rightarrow 4l$ with the ATLAS detector at the LHC.