Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/100240
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Type: Journal article
Title: Finite-volume and partial quenching effects in the magnetic polarizability of the neutron
Author: Hall, J.
Leinweber, D.
Young, R.
Citation: Physical Review D, 2014; 89(5):054511-1-054511-10
Publisher: American Physical Society
Issue Date: 2014
ISSN: 2470-0010
2470-0029
Statement of
Responsibility: 
J. M. M. Hall, D. B. Leinweber, and R. D. Young
Abstract: There has been much progress in the experimental measurement of the electric and magnetic polarizabilities of the nucleon. Similarly, lattice QCD simulations have recently produced dynamical QCD results for the magnetic polarizability of the neutron approaching the chiral regime. In order to compare the lattice simulations with experiment, calculation of partial quenching and finite-volume effects is required prior to an extrapolation in quark mass to the physical point. These dependencies are described using chiral effective field theory. Corrections to the partial quenching effects associated with the sea- quark-loop electric charges are estimated by modeling corrections to the pion cloud. These are compared to the uncorrected lattice results. In addition, the behavior of the finite-volume corrections as a function of pion mass is explored. Box sizes of approximately 7 fm are required to achieve a result within 5% of the infinite-volume result at the physical pion mass. A variety of extrapolations are shown at different box sizes, providing a benchmark to guide future lattice QCD calculations of the magnetic polarizabilities. A relatively precise value for the physical magnetic polarizability of the neutron is presented, βn= 1.93 (11)stat (11)sys × 10⁻⁴ fm³ , which is in agreement with current experimental results
Rights: © 2014 American Physical Society
DOI: 10.1103/PhysRevD.89.054511
Grant ID: http://purl.org/au-research/grants/arc/DP120104627
http://purl.org/au-research/grants/arc/DP110101265
http://purl.org/au-research/grants/arc/FT120100821
Published version: http://dx.doi.org/10.1103/PhysRevD.89.054511
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Physics publications

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