Constraints on bag formation from the scalar sector

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Abstract
Previously it was shown that a bag would form automatically when the Skyrme model was minimally modified to satisfy the scale anomaly equation of QCD. Here, we first calculate the nucleons’ static properties for the two characteristic fits corresponding to deep- and shallow-bag types. Second we further embellish the model in order for the required scalar sector to contain particles in a realistic mass range with physically narrow widths. This requirement favors the shallow-bag type of solution.

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