Study of Higgs Boson in Fermionic Decay Channels at CMS

Somnath Choudhury

doi:10.22323/1.191.0095

Abstract

Results for the Standard Model Higgs Boson search are presented in the final states consisting of either two tau leptons or a bottom quark pair, based on proton-proton collision data collected in the years 2011 and 2012 at 7 and 8 TeV respectively with the CMS experiment. Leptonic and hadronic decay channels for the tau lepton are included in the search. Different production mechanisms namely gluon fusion, vector boson fusion and associated production with vector bosons have been studied. The Standard Model Higgs boson search in the b ¯ b decay channel is studied in associated production with W and Z bosons. Interpretations of the data in the Minimal Supersymmetric Standard Model have also be given for both tt and b¯ b decay modes with the Higgs boson utilizing the final state for associated production with a b-jet to enhance the sensitivity of the minimal supersymmetric Higgs coupling to bottom quarks.

Highlights

The discovery of the mechanism of electro-weak symmetry breaking has been one of the primary goals of the Large Hadron Collider (LHC) at CERN
The detector sub-systems used for the analysis consists of a barrel assembly and two end-caps, comprising, in successive layers outwards from the collision region, the silicon pixel and strip tracker, the lead tungstate crystal electromagnetic calorimeter (ECAL), the brass/scintillator sampling hadron calorimeter (HCAL) enveloped in the superconducting solenoid, outside which are the gas-ionization chambers embedded in steel return yoke for the detection of muons
This result provides a strong affirmation of the Higgs boson coupling to fermions and a first indication of the Higgs coupling to leptons

Summary

Introduction

The discovery of the mechanism of electro-weak symmetry breaking has been one of the primary goals of the Large Hadron Collider (LHC) at CERN. A search for MSSM Neutral Higgs Bosons in decays to a pair of tau leptons and bottom quarks has been reported. The 2-jet category is required to tag the vector-boson fusion Higgs boson production process with the topology of two jets widely separated in pseudorapidity, which gives a high signal over background ratio.

Results

Conclusion