On-shell effective theory for higher-spin dark matter

  title={On-shell effective theory for higher-spin dark matter},
  author={Adam Falkowski and Giulia Isabella and Camila S. Machado},
  journal={SciPost Physics},
We apply the on-shell amplitude techniques in the domain of dark matter. Without evoking fields and Lagrangians, an effective theory for a massive spin-S particle is defined in terms of on-shell amplitudes, which are written down using the massive spinor formalism. This procedure greatly simplifies the study of theories with a higher-spin dark matter particle. In particular, it provides an efficient way to calculate the rates of processes controlling dark matter production, and offers better… 

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