Volume Dependence of the Axial Charge of the Nucleon

2012/05/08 by N. L. Hall, Hall, N. L., A. W. Thomas +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #hep-lat #hep-ph #nucl-th

paper · pdf · doi:10.48550/arxiv.1205.1608

4 pages, 6 figures

arxiv created 2012/05/08 · arxiv updated 2012/05/09

Abstract

It is shown that the strong volume-dependence of the axial charge of the nucleon seen in lattice QCD calculations can be understood quantitatively in terms of the pion-induced interactions between neighbouring nucleons. The associated wave function renormalization leads to an increased suppression of the axial charge as the strength of the interaction increases, either because of a decrease in lattice size or in pion mass.

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