  The open string tachyon and U(1) gauge field as longitudinal fluctuations and
the velocity as transverse fluctuation of an arbitrary dimensional D-brane are
considered as boundary deformations of a closed superstring free action. The
path integral approach will be applied to calculate the corresponding
generalized boundary states using supersymmetrized boundary actions. Obtaining
the disk partition functions from the boundary states and studying the effect
of tachyon condensation on both of them in the NSNS and RR sectors, leads to
results that differ from the established ones.
