Search for the Elusive Higgs Boson Using Jet Structure at LHC

TL;DR

This paper explores detecting a light non-standard Higgs boson at the LHC by analyzing jet substructure to identify decay signatures involving light scalars decaying into gluons, effectively distinguishing signal from background.

Contribution

It introduces a jet substructure analysis method to identify Higgs decays into light scalars and gluons, enhancing detection prospects in challenging backgrounds.

Findings

Jet substructure techniques can effectively identify Higgs decays into light scalars.

Electromagnetic calorimeter-based analysis improves signal extraction.

Promising results for detecting Higgs with specific decay channels at LHC.

Abstract

We consider the production of a light non-standard model Higgs boson of order $100~\GEV$ with an associated $W$ boson at CERN Large Hadron Collider. We focus on an interesting scenario that, the Higgs boson decays predominately into two light scalars $\chi$ with mass of few GeV which sequently decay into four gluons, i.e. $h\to 2\chi \to 4g$. Since $\chi$ is much lighter than the Higgs boson, it will be highly boosted and its decay products, the two gluons, will move close to each other, resulting in a single jet for $\chi$ decay in the detector. By using electromagnetic calorimeter-based and jet substructure analyses, we show in two cases of different $\chi$ masses that it is quite promising to extract the signal of Higgs boson out of large QCD background.