Ramond-Ramond field strength couplings on D-branes

الأصل · EN

By examining in details the disk level S-matrix element of one massless RR and one NSNS states at order O(α'²), we find the coupling of one RR and one NSNS fields on the world volume of a Dₚ-brane. The non-zero couplings involve the first derivative of the RR field strengths F⁽ᵖ⁾, F⁽ᵖ⁺²⁾ and F⁽ᵖ⁺⁴⁾. We then fix the on-shell ambiguity of the couplings by requiring consistency with the linear T-duality transformations. Moreover, consistency with the non-linear T-duality requires that the RR field strength in the above couplings to be F=d C where C=eᵇC.