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- W4320727631 abstract "We present a method to compute the integrands of one-loop Einstein-Yang-Mills amplitudes for any number of external gauge and gravity multiplets. Our construction relies on the double-copy structure of Einstein-Yang-Mills as (super-)Yang-Mills with the so-called YM+$phi^3$ theory -- pure Yang-Mills coupled to bi-adjoint scalars -- which we implement via one-loop Cachazo-He-Yuan formulae. The YM+$phi^3$ building blocks are obtained from forward limits of tree-level input in external gluons and scalars, and we give the composition rules for any number of traces and orders in the couplings $g$ and $kappa$. On the one hand, we spell out supersymmetry- and dimension-agnostic relations that reduce loop integrands of Einstein-Yang-Mills to those of pure gauge theories. On the other hand, we present four-point results for maximal and half-maximal supersymmetry where all supersymmetry cancellations are exposed. In the half-maximal case, we determine six-dimensional anomalies due to chiral hypermultiplets in the loop." @default.
- W4320727631 created "2023-02-15" @default.
- W4320727631 creator A5021575581 @default.
- W4320727631 creator A5053366522 @default.
- W4320727631 date "2023-02-13" @default.
- W4320727631 modified "2023-10-14" @default.
- W4320727631 title "One-loop amplitudes in Einstein-Yang-Mills from forward limits" @default.
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- W4320727631 doi "https://doi.org/10.1007/jhep02(2023)122" @default.
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