Isospin mixing and model dependence
نویسندگان
چکیده
منابع مشابه
Hypercentral constituent quark model and isospin dependence
The constituent quark model based on a hypercentral approach takes into account three-body force effects and standard two-body potential contributions. The quark potential contains a hypercentral interaction, to which a hyperfine term is added. While the hypercentral potential supplies good values for the centroid energies of the resonance multiplets and a realistic set of quark wave functions,...
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Interpreting the recently discovered narrow exotic baryons as pentaquark states, we discuss, along an old argument of ours, the isospin mixing occurring within the two doublets of Q = −1 and Q = 0 states lying inside the S = −2 (Ξ-cascade) sector. We argue that, at least within the Jaffe-Wilczek assignment, presently available data already indicate that mixing should occur at an observable leve...
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We report on the development of a new theoretical tool that allows for isospin projection of Slater determinants and we present its first applications. In particular, we determine the isospin mixing in ground states of N = Z nuclei and discuss its dependence on the size of the harmonic-oscillator basis used in the calculations. We also discuss the unphysical contribution to the isospin mixing c...
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E. Epelbaum,1,∗ Ulf-G. Meissner,2,3,† and J. E. Palomar4,‡ 1Jefferson Laboratory, Theory Division, Newport News, VA 23606 2Universität Bonn, Helmholtz-Institut für Strahlen-und Kernphysik (Theorie), D-53115 Bonn, Germany 3Forschungszentrum Jülich, Institut für Kernphysik (Theorie), D-52425 Jülich, Germany 4Departamento de Fisica Teorica and IFIC, Universidad de Valencia, Institutos de Investiga...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1997
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.56.4404