Cachazo-Svrcek-Witten Rules for Tree-Level Gluonic Amplitudes Revisited
arXiv:2110.04569 · doi:10.1007/s11433-021-1846-9
Abstract
We provide a new proof of Cachazo-Svrcek-Witten rules for tree-level gluonic amplitudes. As a key step, we explicitly show the cancellation of spurious poles originating from the maximally helicity violating vertices in these rules. To achieve this, we introduce specially-defined two-off-shell-line sub-amplitudes and study their residues at spurious poles.
arXiv commentv3, 26 pages, 9 figures, typos fixed, almost the published version
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