The Intra Galaxy Micro Cosmos 4: Betting on the Future of Quantum Gravity | Quanta Magazine

discovery by Bern, Carrasco, and Henrik Johansson of CERN Laboratory that gravitons behave like two copies of gluons, the carriers of the strong nuclear force, which “glues” quarks together inside atomic nuclei. This “double copy” relationship between gravitons and gluons has shown up in every variant of supergravity the researchers have studied, and they expect it to hold in the correct theory of quantum gravity, too, regardless of whether supersymmetry exists in nature. In practice, the discovery means that once a gluon’s scattering amplitude has been computed in a particular form to a given level of precision, “extracting the gravity amplitude is child’s play,” Dixon said..”



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