A Lattice Test of 1/Nc Baryon Mass Relations
Abstract
1/Nc baryon mass relations are compared with lattice simulations of baryon masses using different values of the light-quark masses, and hence different values of SU(3) flavor-symmetry breaking. The lattice data clearly display both the 1/Nc and SU(3) flavor-symmetry breaking hierarchies. The validity of 1/Nc baryon mass relations derived without assuming approximate SU(3) flavor-symmetry also can be tested by lattice data at very large values of the strange quark mass. The 1/Nc expansion constrains the form of discretization effects; these are suppressed by powers of 1/Nc by taking suitable combinations of masses. This 1/Nc scaling is explicitly demonstrated in the present work.
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