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Birdtracks for SU(N)

Stefan Keppeler

SciPost Phys. Lect. Notes 3 (2018) · published 27 September 2018

Abstract

I gently introduce the diagrammatic birdtrack notation, first for vector algebra and then for permutations. After moving on to general tensors I review some recent results on Hermitian Young operators, gluon projectors, and multiplet bases for SU(N) colour space.