Sea Contributions to Spin 1/2 Baryon Structure, Magnetic Moments, and Spin Distribution

Details Sea Contributions to Spin 1/2 Baryon Structure, Magnetic Moments, and Spin Distribution Sea Contributions to Spin 1/2 Baryon Structure, Magnetic Moments, and Spin Distribution

1996-03-08

arxiv.org/abs/hep-ph/9603252v2

Int.J.Mod.Phys. A12 (1997) 1861-1874

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages, REVTEX. References modified

Scientific paper

10.1142/S0217751X97001171

We treat the baryon as a composite system made out of a \lq\lq core" of three quarks (as in the standard quark model) surrounded by a \lq\lq sea" (of gluons and $q\bar{q}$-pairs) which is specified by its total quantum numbers like flavor, spin and color. Specifically, we assume the sea to be a flavor octet with spin 0 or 1 but no color. The general wavefunction for spin 1/2 baryons with such a sea component is given. Application to the magnetic moments is considered. Numerical analysis shows that a scalar (spin 0) sea with an admixture of a vector (spin 1) sea can provide very good fits to the magnetic moment data {\em using experimental errors}. Our best fit automatically gives $g_A/g_V$ for neutron beta decay in agreement with data. This fit also gives reasonable values for the spin distributions of the proton and neutron.

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