Detecting multimuon jets from the Higgs exotic decays in the Higgs portal framework

TL;DR

This paper explores the detection of light particles from Higgs decays using muon jets at the LHC, proposing models and analyzing potential event topologies with multiple muon jets.

Contribution

It introduces Higgs-portal models for light particles decaying into muon jets and analyzes their detectability at the LHC with displaced vertex capabilities.

Findings

Potential to identify light Higgs decay products via muon jets.

Event topologies with multiple muon jets are feasible for detection.

Existing constraints on the models are summarized.

Abstract

A muon jet ($\mu$-jet) is a very special feature that consists of a cluster of collimated muons from the decay of a fast moving light particle of mass about $\mathcal{O}$(1 GeV). We will use this feature to search for very light particles from rare decays of the Higgs boson. For such a small angular separation of muons which might come from a long-lived particle, both ATLAS and CMS could have the displaced-vertexing-reconstruction capability. We use two simple models of the Higgs-portal type to explore the possibilities of event topologies with two $2\mu$-jets, one $2\mu$-jet $\&$ one $4\mu$-jet, and two $4\mu$-jets in the final state at LHC-14. We also summarize existing constraints on these models.