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arXiv · 2106.05301

Spinning amplitudes from scalar amplitudes

Mahesh KN Balasubramanian·Raj Patil·Arnab Rudra
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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.

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Mahesh KN Balasubramanian, Raj Patil, Arnab Rudra. 2021-06-09. Spinning amplitudes from scalar amplitudes. https://doi.org/10.1007/jhep11(2021)151

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