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Light-front wave functions of mesons, baryons and pentaquarks, with topology-induced local 4-quark interaction
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We calculate light-front wave functions of mesons, baryons and pentaquarks in a model including constituent mass (representing chiral symmetry breaking), harmonic confining potential, and 4-quark local interaction of 't Hooft type. The model is a simplified version of that used by Jia and Vary. The method used is numerical diagonalization of the Hamiltonian matrix, with certain functional basis. We found that the nucleon wave function displays strong diquar correlations, unlike that for Delta (decuplet) baryon. We also calculate 3-quark-5-quark admixture to baryons, and the resulting antiquark sea PDF.
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Pentaquarks made of light quarks and their admixture to baryons
Light pentaquark wavefunctions are constructed from permutation symmetry, and a nucleon-pentaquark mixing model yields a five-quark Fock probability P5q of order 0.4.
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