Baryon magnetic moments: Symmetries and relations

Authors

Assumpta Parreño, University of Barcelona
Martin J. Savage, University of Washington
Brian C. Tiburzi, CUNY City CollegeFollow
Jonas Wilhelm, University of Washington
Emmanuel Chang, University of Washington
William Detmold, Massachusetts Institute of Technology
Kostas Orginos, College of William and Mary

Document Type

Article

Publication Date

2018

Abstract

Magnetic moments of the octet baryons are computed using lattice QCD in background magnetic fields, including the first treatment of the magnetically coupled Σ⁰- Λ system. Although the computations are performed for relatively large values of the up and down quark masses, we gain new insight into the symmetries and relations between magnetic moments by working at a three-flavor mass-symmetric point. While the spinflavor symmetry in the large N_c limit of QCD is shared by the naïve constituent quark model, we find instances where quark model predictions are considerably favored over those emerging in the large N_c limit. We suggest further calculations that would shed light on the curious patterns of baryon magnetic moments.

Comments

This article was originally published in EPJ Web of Conferences, available at https://doi.org/10.1051/epjconf/201817506001

This work is distributed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).