Spinning amplitudes from scalar amplitudes

Abstract

Abstract We provide a systematic method to compute tree-level scattering amplitudes with spinning external states from amplitudes with scalar external states in arbitrary spacetime dimensions. We write down analytic answers for various scattering amplitudes, including the four graviton amplitude due to the massive spin J exchange. We verify the results by computing angular distributions in 3 + 1 dimensions using various identities involving Jacobi polynomials.

Keywords

• Scattering Amplitudes
• Field Theories in Higher Dimensions
• Higher Spin Gravity