Search for the Elusive Higgs Boson Using Jet Structure 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 $\ddot{I}‡$ with mass of few GeV which sequently decay into four gluons, i.e. $h\to 2\ddot{I}‡\to 4g$. Since $\ddot{I}‡$ 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 $\ddot{I}‡$ decay in the detector. By using electromagnetic calorimeter-based and jet substructure analyses, we show in two cases of different $\ddot{I}‡$ masses that it is quite promising to extract the signal of Higgs boson out of large QCD background.

20 pages, 7 figures