Parton Distributions for the Octet and Decuplet Baryons

Details Parton Distributions for the Octet and Decuplet Baryons Parton Distributions for the Octet and Decuplet Baryons

1999-02-17

arxiv.org/abs/hep-ph/9902372v1

Phys.Rev.D60:074017,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 15 figures

Scientific paper

10.1103/PhysRevD.60.074017

We calculate the parton distributions for both polarized and unpolarized octet and decuplet baryons, using the MIT bag, dressed by mesons. We show that the hyperfine interaction responsible for the $\Delta - N$ and $\Sigma^0 - \Lambda$ splittings leads to large deviations from SU(3) and SU(6) predictions. For the $\Lambda$ we find significant polarized, non-strange parton distributions which lead to a sizable $\Lambda$ polarization in polarized, semi-inclusive $ep$ scattering. We also discuss the flavour symmetry violation arising from the meson-cloud associated with the chiral structure of baryons.

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