An $N$-independent tensor decomposition for SU($N$)

Stefan Keppeler; Malin Sjodahl; Bernanda Telalovic

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arXiv · 2507.22981

An $N$-independent tensor decomposition for SU($N$)

Stefan Keppeler·Malin Sjodahl·Bernanda Telalovic

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Abstract

To facilitate a simultaneous treatment of an arbitrary number of colors in representation theory-based descriptions of QCD color structure, we derive an $N$-independent reduction of SU($N$) tensor products. To this end, we label each irreducible representation by a pair of Young diagrams, with parts acting on quarks and antiquarks. By combining this with a column-wise multiplication of Young diagrams, we generalize the Littlewood-Richardson rule for the product of two Young diagrams to the product of two Young diagram pairs, achieving a general-$N$ decomposition.

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Stefan Keppeler, Malin Sjodahl, Bernanda Telalovic. 2025-07-30. An $N$-independent tensor decomposition for SU($N$). https://arxiv.org/abs/2507.22981

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