Baryon magnetic moments: Symmetries and relations

Autor:	Parreno, Assumpta, Savage, Martin J., Tiburzi, Brian C., Wilhelm, Jonas, Chang, Emmanuel, Detmold, William, Orginos, Kostas
Rok vydání:	2017
Předmět:	High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory
Druh dokumentu:	Working Paper
DOI:	10.1051/epjconf/201817506001
Popis:	Magnetic moments of the octet baryons are computed using lattice QCD in background magnetic fields, including the first treatment of the magnetically coupled Sigma-Lambda 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 spin-flavor symmetry in the large Nc limit of QCD is shared by the naive constituent quark model, we find instances where quark model predictions are considerably favored over those emerging in the large Nc limit. We suggest further calculations that would shed light on the curious patterns of baryon magnetic moments. Comment: 8 pages, 5 figures, talk given at Lattice 2017, the 35th International Symposium on Lattice Field Theory, Granada, Spain, 18-24 June 2017
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1709.01564 Zobrazit plný text záznamu View this record from Arxiv