  We study the singlet and non-singlet scalar-meson masses using domain wall
fermions and the quenched approximation. The singlet mass is found to be
smaller than the non-singlet mass and indicates that the lowest singlet meson
state could be lighter than 1 GeV. The two-point functions for very small quark
masses are compared with expectations from the small-volume chiral perturbation
theory and the presence of fermionic zero modes.
