NIJMEGEN BARYON-BARYON INTERACTIONS FOR S =-1,-2 SYSTEMS

作者：Rijken Th A^*; Nagels M M; Yamamoto Y

来源：International Journal of Modern Physics E-Nuclear Physics, 2010, 19(12): 2418-2427.

DOI：10.1142/S0218301310016892

We present and discuss the most recent version of the extended-soft-core (ESC) interactions. The ESC-model describes the nucleon-nucleon (NN), hyperonn-nucleon (YN), and hyperon-hyperon (YY), in terms of meson-exchanges using (broken) SU(F)(3)-symmetry. In this approach to baryon-baryon (BB) the dynamics is derived from (i) one-boson-exchanges (OBE), (ii) two-meson-exchanges (TME), and (iii) meson-pair-exchanges (MPE), (iv) gluon-exchanges, and (v) quark-core effects. In the OBE-sector, a special feature is the importance of the axial-vector meson potentials, and the inclusion of a zero in the scalar- and axial- meson form-factors. Novelties are the inclusion of (a) odderon-exchange, and (b) special pronounced effects of the appearance of forbidden six-quark configurations. With these ingredients, a rather flexible dynamical framework is constructed. Namely, it appeared feasible to keep the parameters of the model in reasonable accordance with the predictions of the (3)P(0) quark-pair-creation model (QPC). This is the case for the meson- and meson-pair-baryon coupling constants and the F/(F + D)-ratio's as well. The NN, YN, and YY results for this model are rather promising. In particular, we improved the Lambda N spin-orbit interaction greatly by the inclusion of (a) the Brown, Downs, and Iddings anti-symmetric spin-orbit potentials, and (b) new corrections to the MPE-potentials. Also, the special quark-core effects provide ample repulsion in the Sigma(+)p((3)S(1),T = 3/2)- and Sigma N((1)S(0),T = 1/2)-channels. The new version of the ESC-model reported here will be referred to as ESC07 hence forth.

• 出版日期2010-12