Jf. Gunion et al., DETERMINING THE T(T)OVER-BAR AND ZZ COUPLINGS OF A NEUTRAL HIGGS-BOSON OF ARBITRARY CP NATURE AT THE NEXT LINEAR COLLIDER, Physical review letters, 77(26), 1996, pp. 5172-5175
The optimal procedure for extracting the coefficients of different com
ponents of an observable which takes the form of unknown coefficients
times functions of known form is developed. When applied to e(+)e(-)--
><t(t) over bar>+ Higgs production at root s=1 TeV and integrated lumi
nosity times efficiency of 50 fb(-1), we find that the <t(t)over bar>-
->Higgs CP-even and CP-odd couplings and, to a lesser extent, the ZZ--
>Higgs (CP-even) coupling can be extracted with reasonable errors. Typ
ically, a standard-model-like CP-even Higgs boson can be distinguished
from a purely CP-odd Higgs boson at a high level of statistical signi
ficance, and vice versa.