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arXiv · 2212.04513

Gauge invariant double copy of Yang-Mills theory: the quartic theory

Roberto Bonezzi·Christoph Chiaffrino·Felipe Diaz-Jaramillo·Olaf Hohm
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Abstract

We give an explicit gauge invariant, off-shell and local double copy construction of gravity from Yang-Mills theory to quartic order. To this end we use the framework of homotopy algebras, and we identify a rich new algebraic structure associated to color-stripped Yang-Mills theory. This algebra, which is a generalization of a Batalin-Vilkovisky algebra, is the underlying structure necessary for double copy. We give a self-contained introduction into these algebras by illustrating them for Chern-Simons theory in three dimensions. We then construct N = 0 supergravity in the form of double field theory in terms of the algebraic Yang-Mills building blocks to quartic order in interactions. As applications of the same universal formula, we re-derive the 4-graviton scattering amplitude and compute a chiral form of the Courant algebroid gauge structure of double field theory.

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Roberto Bonezzi, Christoph Chiaffrino, Felipe Diaz-Jaramillo, Olaf Hohm. 2022-12-08. Gauge invariant double copy of Yang-Mills theory: the quartic theory. https://doi.org/10.1103/physrevd.107.126015

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