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HK: Hadronen und Kerne

HK 66: Struktur von Baryonen und Mesonen VII

HK 66.3: Vortrag

Donnerstag, 27. März 1997, 17:30–17:45, HS I

Strangeness Dependence in Radiative Hyperon Decay Amplitudes — •T. Haberichter¹, H. Reinhardt¹, N. Scoccola², and H. Weigel¹ — ¹Institut f"ur Theoretische Physik, Universit"at T"ubingen, Auf der Morgenstelle 14, D-72076 T"ubingen — ²Physics Department, Comision Nacional de Energia Atomica, Av.Libertador 8250, (1429) Buenos Aires, Argentina.

The radiative decays of the 3/2⁺ baryons are studied in the three flavor generalization of the Skyrme model [1]. The kaon fields are treated in the slow rotator approach which properly accounts for the observed deviations from the U–spin relations for the hyperon magnetic moments [2]. This makes possible a critical discussion of the U–spin selection rules for the radiative hyperon decays. The variation of the decay widths with strangeness is studied and a comparison with other treatments of the SU(3) Skyrme model is performed in order to analyze the effects of flavor symmetry breaking. We find that in this treatment the U–spin selection rules are also satisfied but the decay widths decrease more quickly with strangeness than in any other computation [3].

[1] H. Weigel, Intl. J. Mod. Phys. A11 (1996) 2419.

[2] B. Schwesinger and H. Weigel, Nucl. Phys. A540 (1992) 461.

[3] T. Haberichter, H. Reinhardt, N. N. Scoccola and H. Weigel, hep-ph/9610484 Supported in part by the Deutsche Forschungsgemeinschaft (DFG) under contract
Re 856/2–2.