2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77942A bijection is defined from Littlewood-Richardson tableaux to rigged configurations. It is shown that this map preserves the appropriate statistics, thereby proving a quasi-particle expression for the generalized Kostka polynomials, which are q-analogues of multiplicities in tensor products of irreducible general linear group modules indexed by rectangular partitions.66 pages, AMS-LaTeX, requires xy.sty and related filesCombinatoricsQuantum Algebra05A19; 05A15text