Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Lattice QCD analysis of the strangeness magnetic moment of the nucleon
Author: Leinweber, D.
Thomas, A.
Citation: Physical Review D: Particles, Fields, Gravitation and Cosmology, 2000; 62(7):www1-www10
Publisher: American Physical Soc
Issue Date: 2000
ISSN: 1550-7998
Statement of
Derek B. Leinweber and Anthony W. Thomas
Abstract: The outcome of the SAMPLE Experiment suggests that the strange-quark contribution to the nucleon magnetic moment, G_M^s(0), may be greater than zero. This result is very difficult to reconcile with expectations based on the successful baryon magnetic-moment phenomenology of the constituent quark model. We show that careful consideration of chiral symmetry reveals some rather unexpected properties of QCD. In particular, it is found that the valence u-quark contribution to the magnetic moment of the neutron can differ by more than 50% from its contribution to the Xi^0 magnetic moment. This hitherto unforeseen result leads to the value G_M^s(0) = -0.16 +/- 0.18 with a systematic error, arising from the relatively large strange quark mass used in existing lattice calculations, that would tend to shift G_M^s(0) towards small positive values.
Rights: ©2000 American Physical Society
DOI: 10.1103/PhysRevD.62.074505
Published version:
Appears in Collections:Aurora harvest 2
Special Research Centre for the Subatomic Structure of Matter publications

Files in This Item:
File Description SizeFormat 
hdl_11177.pdfPublished version341.55 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.