BRST-Lagrangian Double Copy of Yang-Mills Theory.

  title={BRST-Lagrangian Double Copy of Yang-Mills Theory.},
  author={Leron Borsten and Branislav Jur{\vc}o and Hyungrok Kim and Tommaso Macrelli and Christian Saemann and Martin Wolf},
  journal={arXiv: High Energy Physics - Theory},
We show that the double copy of gauge theory amplitudes to $\mathcal{N}=0$ supergravity amplitudes extends from tree level to loop level. We first explain that color-kinematic duality is a condition for the Becchi-Rouet-Stora-Tyutin operator and the action of a field theory with cubic interaction terms to double copy to a consistent gauge theory. We then apply this argument to Yang-Mills theory, where color-kinematic duality is known to be satisfied onshell at tree level. Finally, we show that… Expand
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