Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/59709
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Type: Journal article
Title: The nucleon's octet axial-charge gA(8) with chiral corrections
Author: Bass, S.
Thomas, A.
Citation: Physics Letters B: Nuclear Physics and Particle Physics, 2010; 684(4-5):216-220
Publisher: Elsevier Science BV
Issue Date: 2010
ISSN: 0370-2693
Statement of
Responsibility: 
Steven D. Bass and Anthony W. Thomas
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 gA(8) which is usually taken from an analysis of hyperon β-decays within the framework of SU(3) symmetry, namely 0.58 ± 0.03. Using the Cloudy Bag model we find that the value of gA(8) is reduced by as much as 20% below the usual phenomenological value. This increases the value of the flavour-singlet axial-charge (gA(0) |inv) derived from deep inelastic data and significantly reduces the difference between it and gA(8). © 2010 Elsevier B.V. All rights reserved.
Keywords: Proton spin puzzle
SU(3) breaking
Rights: Copyright © 2010 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.physletb.2010.01.008
Published version: http://dx.doi.org/10.1016/j.physletb.2010.01.008
Appears in Collections:Aurora harvest
Physics publications

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