Lattice QCD Calculations of Hadron Structure: Constituent Quarks and Chiral Symmetry

D. B. Leinweber , A. W. Thomas (CSSM , University of Adelaide)

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classification ⚛️ nucl-th

keywords chiralconstituentillustratedmomentnucleonallowanapolebest

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New data from parity-violating experiments on the deuteron now allow isolation of the strange-quark contribution to the nucleon magnetic moment, G_M^s(0), without the uncertainty surrounding the anapole moment of the nucleon. Still, best estimates place G_M^s(0) > 0. It is illustrated how this experimental result challenges the very cornerstone of the constituent quark model. The chiral physics giving rise to G_M^s(0) \sim 0 is illustrated.

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