Recent Soft-core Baryon-baryon Interactions
Recent results obtained with the extended-soft-core (ESC) interactions are presented.In a unified manner the ESC-model, describes nucleon-nucleon (NN), hyperon-nucleon (YN), and hyperon-hyperon (YY), using (broken) SUF(3)-symmetry. In the ESC approach we include besides one-boson-exchanges (OBE) also two-meson-exchanges (TME), and meson-pair-exchanges (MPE). Novel ingredients in the recent versions are the inclusion of (i) the axial-vector meson potentials, and (ii) a zero in the scalar-meson form-factors. With these innovations, it appeared possible for the first time to keep the parameters of the model rather close to the predictions of the 3P0 quark-pair-creation model (QPC). This is the case for the meson-baryon coupling constants and the F/(F + D)-ratios as well. The NN, YN,and YY results for this model are rather promising. Here, we report on a recently published version, called ESC04. Also, we present the first results with the next version, called ESC06,where we explore the inclusion of the second nonets for the pseudoscalar, vector, and scalar mesons, which have masses approximately in the interval 1 GeV ≤ M ≤ 1.5 GeV. In the q(q)-picture these mesons are the radially excited states, with principal quantum number N=2,of the low lying meson nonets for M ≤ 1GeV. This improves the ∑-well-depth considerably.
Th.A.Rijken Y.Yamamoto
Institute of Mathematics, Astrophysics and Particle Physics,University of Nijmegen, Nijmegen, The Ne Tsuru University, Tsuru, Japan
国际会议
The International Workshop on Strangeness Nuclear Phusics 2006(国际奇异性核物理研讨会)
湖南张家界
英文
10-16
2006-09-05（万方平台首次上网日期，不代表论文的发表时间）