HIGGS PARTICLE-DETECTION USING JETS

We study the possibility of detecting the Higgs boson in the intermedi ate mass range via its two-jet channel. We consider only Higgs bosons produced in association with a ttBAR pair. Both t and tBAR are require d to decay semileptonically to reduce the QCD background. The signal i s compared with the main background, ttBAR + 2 jets, after appropriate cuts. Our estimate, using approximate formulas for the signal and the dominant background ttggBAR and a 10% invariant jet mass resolution, suggests a 6.5sigma effect. A more detailed study to confirm our resul t would be desirable. Use of the ttZBAR channel with Z decaying to l+l - is also suggested for eliminating theoretical uncertainties in deter mining the ttHBAR signal.