  While the Bethe Ansatz solution of the Haldane--Shastry model appears to
suggest that the spinons represent a free gas of half-fermions, Bernevig,
Giuliano, and Laughlin (BGL) (cond-mat/0011069, cond-mat/0011270) have
concluded recently that there is an attractive interaction between spinons. We
argue that the dressed scattering matrix obtained with the asymptotic Bethe
Ansatz is to be interpreted as the true and physical scattering matrix of the
excitations, and hence, that the result by BGL is inconsistent with an earlier
result by Essler (cond-mat/9406081). We critically re-examine the analysis of
BGL, and conclude that there is no interaction between spinons or spinons and
holons in the Haldane--Shastry model.
