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Unquenched quark model for baryons: magnetic moments, spins and orbital angular momenta

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arxiv 0912.4494 v1 pith:2YOQALX6 submitted 2009-12-22 nucl-th hep-exhep-phnucl-ex

R. Bijker , E. Santopinto This is my paper · ORCID
classification nucl-thhep-exhep-phnucl-ex
keywords pairsquark-antiquarkangularbaryonbaryonscontributionmagneticmodel
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We present an unquenched quark model for baryons in which the effects of the quark-antiquark pairs (up, down and strange) are taken into account in an explicit form via a microscopic, QCD-inspired, quark-antiquark creation mechanism. In the present approach, the contribution of the quark-antiquark pairs can be studied for any inital baryon and for any flavor of the pairs. It is shown that, while the inclusion of quark-antiquark pairs does not affect the baryon magnetic moments, it leads to a sizeable contribution of the orbital angular momentum to the spin of the proton and the Lambda hyperon.

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  1. Pentaquarks made of light quarks and their admixture to baryons

    hep-ph 2025-07 conditional novelty 6.0 of 10

    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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