Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-02-13
Phys.Rev.D75:074002,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages, REVTeX, to be published in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.75.074002
The mass spectrum and magnetic moments of \Xi and \Omega baryon resonances are investigated in the bound state approach of the Skyrme model. The empirical hyperon spectrum shows that several hyperon resonances share a pattern of (approximately) equal mass spacings between the states of same spin but of opposite parity. It is found that this pattern can be explained mostly by the energy difference between the P-wave and S-wave kaons bound to the soliton. Although one cannot exclude the possibility that these states can be described as pion-hyperon resonances, the present approach predicts that \Xi(1620) and \Xi(1690) have J^P = 12^-, while \Xi(1950) has J^P = 12^+. The differences with the quark model predictions for the \Xi and \Omega baryon spectrum are pointed out. Several relations for the masses and magnetic moments of those resonances are also obtained.
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