Path integral evaluation of Dbrane amplitudes
arXiv:hep-th/9907179 · doi:10.1103/PhysRevD.60.106007
Abstract
We extend Polchinski's evaluation of the measure for the one-loop closed string path integral to open string tree amplitudes with boundaries and crosscaps embedded in Dbranes. We explain how the nonabelian limit of near-coincident Dbranes emerges in the path integral formalism. We give a careful path integral derivation of the cylinder amplitude including the modulus dependence of the volume of the conformal Killing group.
Extended version replacing hep-th/9903184, includes discussion of nonabelian limit, Latex, 10 pages