One-loop Bern-Carrasco-Johansson Numerators on Quadratic Propagators from the Worldsheet

Autor:	Dong, Jin, Zhang, Yao-Qi, Zhang, Yong
Rok vydání:	2023
Předmět:	High Energy Physics - Theory
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.109.L101905
Popis:	We introduce a novel approach for deriving one-loop Bern-Carrasco-Johansson (BCJ) numerators and reveal the worldsheet origin of the one-loop double copy. Our work shows that expanding Cachazo-He-Yuan half-integrands into generalized Parke-Taylor factors intrinsically generates BCJ numerators on quadratic propagators satisfying Jacobi identities. We validate our methodology by successfully reproducing one-loop BCJ numerators for Non-Linear Sigma Model as well as those of pure Yang-Mills theory in four dimensions with all-plus or single-minus helicities. Comment: 6+6 pages, three figures. v2: minimal cosmetic changes, matches the published version in PRD
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2312.01580 Zobrazit plný text záznamu View this record from Arxiv