Hyperon magnetic moments and the 1 - +0-++ decays Article

Oneda, S, Tanuma, T, Toiya, T et al. (1981). Hyperon magnetic moments and the 1 - +0-++ decays . PHYSICAL REVIEW D, 23(3), 787-792. 10.1103/PhysRevD.23.787

cited authors

  • Oneda, S; Tanuma, T; Toiya, T; Slaughter, MD

authors

abstract

  • Recent precision measurements of hyperon magnetic moments reveal that the moments of the , +, and 0 are significantly smaller than the values predicted by the Coleman-Glashow formula or by the naive quark model. In the theoretical framework of SU(3) charge-current equal-time commutation relations and asymptotic SU(3) symmetry, the spin-nonflip sum rules imply that the usual SU(3) parametrization should apply not for the hyperon magnetic moments but for the product (anomalous magnetic moment)×(hyperon mass). Thus, the gross features of the observed hyperon magnetic moments are explained in terms of these derived mass-scale factors. The consistency of the spin-nonflip and -flip sum rules also implies that the remaining discrepancies should be attributed to the SU(3) mixings between the hyperons and their higher-lying excited + states. In the same theoretical framework, the status of the similar magnetic-moment interactions, 1 - +0-++, is also reviewed, by studying the consistency of the asymptotic SU(3) sum rules. It is concluded that the usual consideration of the related SU(3) mixing, especially the ones involving the and , is insufficient. © 1981 The American Physical Society.

publication date

  • January 1, 1981

published in

Digital Object Identifier (DOI)

start page

  • 787

end page

  • 792

volume

  • 23

issue

  • 3