Is there a mass dependence in the spin structure of baryons?
arXiv:hep-ph/9805462 · doi:10.1088/0031-8949/58/2/002
Abstract
We analyze the axial-vector form factors of the nucleon-hyperon system in a model with SU(3) symmetry breaking due to mass dependent quark spin polarizations. This mass dependence is deduced from an analysis of magnetic moment data, and implies that the spin contributions from the quarks to a baryon decrease with the mass of the baryon. When applied to the axial-vector form factors, these mass dependent spin polarizations bring the various sum-rules from the quark model in better agreement with experimental data. As a consequence our analysis leads to a reduced value for the total spin polarization of the proton.
11 pages, 2 figures. To be published in Physica Scripta
References in corpus (10)
- Decuplet Baryon Structure from Lattice QCD
- Determination of and the Nucleon Spin Decomposition Using Recent Polarized Structure Function Data
- FLAVOR-SINGLET g_A FROM LATTICE QCD
- SU(3) Breaking Effects in Hyperon Semi-Leptonic Decays and the extraction of F and D
- Spin Contents of Nucleons with SU(3) Breaking
- Reanalysis of hyperon beta decay data on
- How to Use Weak Decays in Analyses of Data on Nucleon Spin Structure Functions
- F/D Ratios in Hyperon Beta Decays and Spin Distribution in the Nucleon
- Magnetic moments of the 3/2 resonances and their quark spin structure
- Flavor symmetry breaking in quark magnetic moments