Study of Invariant Mass Resolution of the W Boson

Abstract

Our modern understanding on the study of elementary particles is the Standard Model (SM). It has been successful in predicting and explaining the existence and behavior of all known constituent particles in nature. The only remaining  particle which the SM predicted to exist is the Higgs boson. It has not been observed experimentally. In the elusive search for this particle the Asian Committee for Future Accelerators (ACFA) has proposed the construction of the Joint Linear Collider (JLC) with center-of-mass energy of 500 GeV to 1.5 TeV. The main purpose of this collider is to discover the Higgs boson. Since this particle is sensitive to precision measurements of the weak bosons we investigate the reaction e†e¯       e vW, where the W boson decays into two hadronic jets. This Study focuses on the invariant mass measurement of the W boson using the 2-jet decay channel with and without beamsstrahlung (BM) and initial state radiation (1SR) effects. The mass of the W boson can be used to constraint the mass of the Higgs boson [1]. The JLC Study Framework (JSF) is employed for this purpose. The center of mass energy is set at 500 GeV.