A narrow resonance decaying to dijets could be discovered at the 14 TeV run
of the LHC. To quickly identify its color structure in a model-independent
manner, we introduced a method based on a color discriminant variable,
determined from the measurements of the resonance's production cross section,
mass and width. This talk introduces a more transparent theoretical formulation
of the color discriminant variable that highlights its relationship to the
branching ratios of the resonance into incoming and outgoing partons and to the
properties of those partons. The formulation makes it easier to predict the
value of the variable for a given class of resonance. We show that this method
applies well to color-triplet and color-sextet scalar diquarks, distinguishing
them clearly from other candidate resonances.Comment: 9 pages, 3 figures. Presentation at the DPF 2015 Meeting of the
American Physical Society Division of Particles and Fields, Ann Arbor,
Michigan, August 4-8, 201
