Gravitational radiation from color-kinematics duality
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Publication:1635259
DOI10.1007/JHEP11(2018)162zbMATH Open1404.83022arXiv1806.07388OpenAlexW2809593912WikidataQ128862430 ScholiaQ128862430MaRDI QIDQ1635259
Author name not available (Why is that?)
Publication date: 18 December 2018
Published in: (Search for Journal in Brave)
Abstract: We perturbatively calculate classical radiation in Yang-Mills theory and dilaton gravity, to next-to-leading order in couplings. The radiation is sourced by the scattering of two relativistic massive scalar sources with the dynamical effect taken into account, corresponding to the post-Minkowskian regime in gravity. We show how to arrange the Yang-Mills radiation such that the duality between colors and kinematics is manifest, including the three-term Jacobi identity. The search for duality-satisfying expressions exploits an auxiliary bi-adjoint scalar theory as a guide for locality. The double copy is obtained by replacing the color factors in Yang-Mills with kinematic counterparts, following Bern-Carrasco-Johansson construction in S- matrix. On the gravity side, the radiation is directly computed at the third post-Minkowskian order with massive sources. We find perfect agreement between observables in dilaton gravity and the Yang-Mills double copy. This non-trivially generalizes the leading-order rules by Goldberger and Ridgway. For the first time, the kinematic Jacobi identity appears beyond field-theory S-matrix, suggesting that the color-kinematics duality holds more generally. Our results offer a path for simplifying analytical calculations in post-Minkowskian regime.
Full work available at URL: https://arxiv.org/abs/1806.07388
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