HEAVY HIGGS PRODUCTION AND DECAY VIA E+E--]Z(0)H(0)-]B(B)OVER-BAR-W+W- AND IRREDUCIBLE BACKGROUNDS AT THE NEXT LINEAR COLLIDER

The complete matrix element for e+e- --> bbBARW+W- has been computed at tree-level and applied to Z0H0 production followed by Z0 --> bbBAR and H0 --> W+W-, keeping into account all irreducible backgrounds, which are dominated by ttBAR production, at the Next Linear Colliders. We find that, depending on the center of mass energies and on the search strategies, this channel can be useful for the study of the parameters of the Standard Model Higgs boson over the most part of the heavy mass range.