The form factors of the flavor changing vector current between a qΛβQ-meson and the lightest qΛβq (pseudoscalar-)meson are computed exactly
and explicitly in the 't~Hooft model (planar QCD in 1+1 dimensions) in the
limit that the mass of q-quark vanishes.Comment: 8p (uuencoded, includes 4 eps figs, LaTeX & epsf), SMU-HEP/94-11 and
UCSD/PTH 94-0