Topics In Collider Physics

Abstract

The Large Hadron Collider (LHC), the world's largest and highest-energy particle accelerator, is leading particle physics into a new era. This experiment will very likely to discover the mechanism responsible for electroweak symmetry breaking and also possibly new particles at the TeV scale. This thesis addresses some topics which we may hope to probe at the LHC. Chapter 1 serves as an introduction, reviewing the Standard Model and introducing all the topics covered in this thesis. In Chapter 2, we discuss the evaluation of PDF uncertainty of W->lv cross section at the LHC with the Hessian Method. In Chapter 3, we discuss the search channel for boosted Higgs boson produced with a vector boson using Jet Trimming Technique. In Chapter 4, we discusses a new collider based probe of electroweak symmetry breaking, designed to look for models that approximate the Standard Model at the electroweak scale, but which deviate from it at higher energies. In Chapter 5, we discuss the feasibility of seeing a Higgs boson which decays to four bottom quarks through a pair of long-lived (pseudo-)scalars. In Chapter 6, we investigates various sources of the systematic uncertainty in the dijet mass distribution of W+jets at Tevatron . Chapter 7 contains the conclusions.