Let G = SU(n,1),
K = S(U(n) ×U(1)), and for l ∈ ℤ, let {τl}l∈ℤ be a one-dimensional K-type and let
El the line bundle over G∕K associated to τl. In this work we prove that the
resolvent of the Laplacian, acting on Cc∞-sections of El is given by convolution with
a kernel which has a meromorphic continuation to ℂ. We prove that this extension
has only simple poles and we identify the images of the corresponding residues with
(g,K)-submodules of the principal series representations. We show that for certain
values of the parameters these modules are holomorphic (or antiholomorphic) discrete
series.