SEARCHING FOR HIGGS BOSONS ON LHC USING b-TAGGING

Understanding the Higgs sector is one of the fundamental missions of future high energy colliders such as the LHC. However, options for detection of the Standard Model (SM) Higgs boson, φ, are limited to rare γγ decay chanel if mφ0 lies between 80 GeV and 130 GeV. The Higgs bosons of the Minimal Supersymmetric Standard Model (MSSM) is even harder to find. In fact, there may be a window of mA–tanβ parameter space, in which no MSSM Higgs boson would be seen either at LEP-II or at the LHC. Clearly, the establishment of viable techniques for detection of the Higgs bosons in its main decay mode in the intermediate mass region, h → bb, would be highly desirable. In this talk, we present our works on using b-tagging to search for Higgs bonsons. The basic idea is to look for Higgs bosons produced associated with tt or bb, which then decays into bb, hence the final state is ttbb or bbbb. In either case, there will be four b-quarks in the final state. By tagging three or more b’s, QCD background can be suppressed and the detection of the Higgs mass peak is possible.