ar X iv : h ep - p h / 96 03 25 2 v 2 4 M ay 1 99 6 Sea contributions to spin 1 / 2 baryon structure , magnetic moments , and spin distribution
نویسندگان
چکیده
We treat the baryon as a composite system made out of a " core " of three quarks (as in the standard quark model) surrounded by a " sea " (of gluons and q ¯ 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 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.
منابع مشابه
ar X iv : h ep - p h / 96 03 25 4 v 1 9 M ar 1 99 6 Sea contributions to spin 1 / 2 baryon structure and magnetic moments
We treat the baryon as a composite system made out of a " core " of three quarks (as in the standard quark model) surrounded by a " sea " (of gluons and q ¯ 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 but no color. The general wavefunction for spin 1/2 baryons with such a sea component is ...
متن کاملar X iv : h ep - p h / 96 03 25 2 v 1 8 M ar 1 99 6 Sea contributions to spin 1 / 2 baryon structure , magnetic moments , and spin distribution
We treat the baryon as a composite system made out of a " core " of three quarks (as in the standard quark model) surrounded by a " sea " (of gluons and q ¯ 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 componen...
متن کاملep - p h / 98 03 42 9 v 1 2 3 M ar 1 99 8 Masses , Magnetic Moments , and Semileptonic Decays of Spin 1 / 2 Baryons with Sea Contribution
The spin 1/2 baryons are pictured as a composite system made out of a " core " of three valence quarks (as in the simple quark model) surrounded by a " sea " (of gluon and q ¯ q pairs) which is specified by its total quantum numbers. We assume the sea is a SU (3) flavor octet with spin 0 or 1 but no color. This model, considered earlier, is used to obtain simultaneous fits for masses, magnetic ...
متن کاملar X iv : h ep - l at / 9 40 50 03 v 2 4 M ay 1 99 4 Hadron Masses from the Valence Approximation to Lattice QCD
We evaluate pseudoscalar, vector, spin 1/2 and spin 3/2 baryon masses predicted by lattice QCD with Wilson quarks in the valence (quenched) approximation for a range of different values of lattice spacing, lattice volume and quark mass. Extrapolating these results to physical quark mass, then to zero lattice spacing and infinite volume we obtain values for eight mass ratios. We also determine t...
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