Spinning amplitudes from scalar amplitudes

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.

arXiv commentTextual improvements, updated bibliography. Version to appear in JHEP

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Cited by in corpus (2)

• Graviton partial waves and causality in higher dimensions
• On-shell Supersymmetry and higher-spin amplitudes