Electromagnetic contribution to the proton-neutron mass splitting

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dc.contributor.authorThomas, A.
dc.contributor.authorWang, X.
dc.contributor.authorYoung, R.
dc.date.issued2015
dc.description.abstractWe study the electromagnetic contribution to the proton-neutronmass splitting by combining lattice simulations and the modified Cottingham sum rule of Walker-Loud, Carlson, and Miller. This analysis yields an estimate of the isovector nucleon magnetic polarizability as a function of pion mass. The physical value, obtained by chiral extrapolation to the physical pion mass, is βp-n= (−1.12 ± 0.40) × 10−4 fm3,, which is in agreement with the empirical result, albeit with a somewhat smaller error. As a result, we find δMγ p-n= 1.04 ± 0.11 MeV, which represents a significant improvement in precision.
dc.description.statementofresponsibilityA. W. Thomas, X. G. Wang, and R. D. Young
dc.identifier.citationPhysical Review C: Nuclear Physics, 2015; 91(1):015209-1-015209-4
dc.identifier.doi10.1103/PhysRevC.91.015209
dc.identifier.issn0556-2813
dc.identifier.issn1089-490X
dc.identifier.orcidThomas, A. [0000-0003-0026-499X]
dc.identifier.orcidWang, X. [0000-0001-9164-0027]
dc.identifier.orcidYoung, R. [0000-0002-4527-1811]
dc.identifier.urihttp://hdl.handle.net/2440/101023
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.granthttp://purl.org/au-research/grants/arc/FL0992247
dc.relation.granthttp://purl.org/au-research/grants/arc/DP110101265
dc.relation.granthttp://purl.org/au-research/grants/arc/FT120100821
dc.rights©2015 American Physical Society
dc.source.urihttps://doi.org/10.1103/physrevc.91.015209
dc.titleElectromagnetic contribution to the proton-neutron mass splitting
dc.typeJournal article
pubs.publication-statusPublished

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