Signal and background of standard Higgs particle

The detection of Higgs particle at colliders is one of the interesting issues in the field of high energy physics. For several years, the authors have been studying the detection of the light standard Higgs particle (MH < MW or MZ) and its background contributions at SLC and LEP I and II energies. At the moment, it is thought that physics at SLC and LEP I and II is a gate way to 'Physics at TeV Region'. To detect the light standard Higgs particle at √s < 160 GeV, the following reaction is a good process. Signal(S): e+e- →ι+ι-H (ι = μ or e). It is shown here that the magnitude of the signal (S) depends on the total width of the Z-boson and, to determine the mass of the Higgs particle, a collinearity-angle distribution is more favorable than the invariant mass distribution. For this, one has to consider the background contribution to the collinearity-angle distribution. Thus, the production of the Higgs particle is discussed focusing on the invariant mass distribution. The report then discusses the background contribution, the magnitude of the signal and the width of the Z-boson, collinearity-angle distribution, comparison of the signal and background, and new analyses at Z-pole and √s = 110 GeV. (N.K.)