The nucleon's octet axial-charge gA(8) with chiral corrections

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 +/- 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)((8))vertical bar inv) derived from deep inelastic data and significantly reduces the difference between it and g(A)((8)). (C) 2010 Elsevier B.V. All rights reserved.