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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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