The nucleon's octet axial-charge g_A^8 with chiral corrections
High Energy Physics - Phenomenology
2014-11-20 v1
Abstract
The value of the nucleon's flavour-singlet axial-charge extracted from polarised deep inelastic scattering is sensitive to the value of the octet axial-charge g_A^8 which is usually taken from an analysis of hyperon beta-decays within the framework of SU(3) symmetry, namely 0.58 \pm 0.03. Using the Cloudy Bag model we find that the value of g_A^8 is reduced by as much as 20% below the usual phenomenological value. This increases the value of the flavour singlet axial charge (g_A^0|_inv) derived from deep inelastic data and significantly reduces the difference between it and g_A^8.
Keywords
Cite
@article{arxiv.0912.1765,
title = {The nucleon's octet axial-charge g_A^8 with chiral corrections},
author = {Steven D. Bass and Anthony W. Thomas},
journal= {arXiv preprint arXiv:0912.1765},
year = {2014}
}
Comments
12 pages