Göttingen 1997 – wissenschaftliches Programm
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HK: Hadronen und Kerne
HK 27: Struktur von Baryonen und Mesonen III
HK 27.2: Vortrag
Dienstag, 25. März 1997, 14:30–14:45, HS I
Strangeness in the Nucleon and Neutrino Scattering — •H. Weigel3, E. Kolbe1, and S. Krewald2 — 1Institut f"ur Physik der Universit"at Basel, Klingelbergstrasse 82, CH–4056 Basel, Switzerland — 2Institut für Kernphysik, Forschungsanlage Jülich, D–52425 Jülich — 3Institut f"ur Theor. Physik, Universit"at T"ubingen, D-72076 T"ubingen
The electroweak form factors of the nucleon as obtained within a three flavor pseudoscalar vector meson soliton model [1] are employed to predict the ratio of the proton and neutron yields from 12C. These yields, which are induced by quasi–elastic neutrino reactions, are computed in a two step calculation. First, collective coordinates are introduced in flavor SU(3) to construct baryon wave–functions from the classical soliton configuration. When canonically quantizing these coordinates special care is taken to account for flavor symmetry breaking. In the second step the wave–function of the nucleus is constructed within a continuum random phase approximation [2]. The predictions for the yields are found to vary only moderately in the parameter space allowed by the model [3].
[1] N. W. Park and H. Weigel, Nucl. Phys. A541, 453 (1992); H. Weigel, Int. J. Mod. Phys. A11 2419 (1996).
[2] E. Kolbe, K. Langanke, S. Krewald and F. K. Thielemann, Nucl. Phys. A540 599 (1992).
[3] E. Kolbe, S. Krewald and H. Weigel,
nucl-th/9610001.
Supported in part by the Deutsche
Forschungsgemeinschaft (DFG) under contract
Re 856/2–2.