A minimal-symmetry quark model for baryons is extended by charmed-quark substitution to charmed baryons. This induces a transformation of 9 mass relations for the 18 uncharmed baryons directly into 14 mass relations for 22 charmed baryons, with minimal SU(4) or SU(8) symmetry assumptions. Of the charmedbaryon mass relations, 6 are for mass differences of electromagnetic order and 8 are for strong mass differences.
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Jerrold Franklin (1975) studied this question.
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