Proposal for non-Bogomol'nyi-Prasad-Sommerfield D-brane action

In this paper we would propose a form for the action of a non-BPS D-brane, which will be manifestly supersymmetric invariant and T-duality covariant. We also explicitly show that tachyon condensation on the world-volume of this brane leads to the Dirac-Born-Infeld action for a BPS D(p-1)-brane.