クォーク模型によるバリオン重項のバリオン間相互作用FB.pptVIP

nd Scattering Observables Derived from the Quark-Model Baryon-Baryon Interaction Motivation Quark-model baryon-baryon interaction fss2 Three-cluster Faddeev formalism in the renormalized RGM Results 4.1. 3H binding energy 4.2. nd scattering length; 2a and 4a 4.3. Total and differential cross sections 4.4. Polarization observables; Ay(?), iT11(?). T2m(?), K??’?’, etc. 4.5. Comparison with a fixed ?K model 5. Summary Motivation 3-body force does always exist for 3-body systems of composite particles. Problem is how strong it is. Recent large effect of 3N force in the meson-exchange potentials might be an artifact of the static and local representation of the hard core in the NN interaction. An alternative description of the strong short-range repulsion is the non-local exchange kernel of the QM BB interaction. We therefore study the effect of non-locality and the off-shell effect of the short-range NN interaction by taking into account the na?ve 3-quark structure of nucleons. Characteristics of the nd scattering system Channel-spin formalism Sc=(I=1)(d)?(s=1/2)(n)=3/2+1/2 Sc=3/2 “Pauli principle” ? weak distortion effect Sc=1/2 strong distortion Cf. nd RGM breakup process is important (?d =2.224 MeV) NN singularity and the moving singularity should be properly treated at En 3 MeV enough partial waves (Imax=2 or 4) should be included even for the energies En ? 10 MeV reason: the deuteron is so widely spread ! Many challenging problems still remain 1. 3H binding energy (exp: 8.482 MeV): 0.5 – 1 MeV too small by the standard meson-exchange NN potentials. A. Nogga et al. Phys. Rev. Lett. vs. 0.35 MeV by fss2 (with PD=5.49 %) 85, 944 (2000) 2. spin-doublet scattering length 2and= 0.65 ? 0.04 fm 4and= 6.35 ? 0.02 fm “consistent understanding between EB(3H) and 2and is not achieved” 　　 W. Witala et al