Gravitational couplings of D-branes and O-planes Original Research Article

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.