Paper of Tommaso Macrelli and Martin Wolf on loop-level color-kinematics duality published in Nuclear Physics B

The paper “Tree-level color-kinematics duality implies loop-level color-kinematics duality up to counterterms“, co-authored by Leron Borsten (Heriot-Watt), Hyungrok Kim (Heriot-Watt), Branislav Jurco (Charles University Prague), Tommaso Macrelli (Surrey and ETH Zurich), Christian Saemann (Heriot-Watt), and Martin Wolf, has been published this week in Nuclear Physics B. The paper is published open access (link here). Color–kinematics (CK) duality is a remarkable symmetry of gluon amplitudes that is the key to the double copy which links gauge theory and gravity amplitudes. This paper shows that the complete Yang-Mills action itself, including its gauge-fixing and ghost sectors required for quantization, can be recast to manifest CK duality using a series of field re-definitions and gauge choices. The image below shows Table 5.1 from the paper.