%0 Journal Article %T Gravitational Couplings of D-branes and O-planes %A B. Stefanski Jr %J Physics %D 1998 %I arXiv %R 10.1016/S0550-3213(99)00147-9 %X An explicit calculation is performed to check all the tangent bundle gravitational couplings of Dirichlet branes and Orientifold planes by scattering $q$ gravitons with a $p+1$ form Ramond-Ramond potential in the world-volume of a $D(p+2q)$-brane. The structure of the D-brane Wess-Zumino term in the world-volume action is confirmed, while a different O-plane Wess-Zumino action is obtained. %U http://arxiv.org/abs/hep-th/9812088v2