Promote The Application Of Qdcsm Model To Calculate The Nn Scattering Phase Shift

Quantum chromodynamics (QCD) is generally accepted as the fundamental theory of the strong interaction. High energy processes are calculable using perturbation method due to the asymptotic freedom property of QCD, however, owing to the infrared confinement, low and middle energy strong interaction systems can not be resolved directly according to QCD. At present and even in the future, the QCD-inspired model will be a useful tool to explore the secret of strong interaction systems. The main quark models include bag model, soliton model and potential model etc. Under the frame of quark potential model, there are many forms of interactions between quarks: meson-exchange model, constituent quark model and etc. All of these models are successful for the meson and baryon properties.Because any disagreements with the experiment data can generally be repaired by many fine-tuning parameters .The more of parameters, the poorer of capability to predict. Even the newest experiment data still can not discriminate among most models, each model must carry out some calculation qualitatively to explain the updated experiment data. At the same time we must research some phenomena which depend on model sensitively. The quark delocalization color screening model (QDCSM) is a "parameter-free" model. And we have done some elementary calculation about hadronic interaction using this naive model, at the same time; we have taken some measure to amend this model expecting to make it more correct.In this work, we carry a more careful calculation about NN phaseshift using QDCSM model. QDCSM was developed in 90s of the 20th century under the basis of the traditional potential model; this model has few parameters, and has strong power to predict the new phenomena. We have done some elementary calculation about hadronic interaction and made some prediction about the existence of dibaryon using this naive model, and got some important result. In order to extensively test this model, we should do more qualitative calculation. So in this paper we introduce the one pion exchange interaction in the long distance by a cut-off function in the potential to the QDCSM model, and get the baryon effective potential and NN scattering phaseshift. And we add the tensor part of one-gluon-exchange which was absented before. The result indicates that thecut-ofif one pion exchange can produce the long distance interaction in the model and the result is more agreed with the experiment data than before. The one pion exchange influences the result mainly by coupling: S wave and D wave. With these results and the correlative calculation about deuton and d dibaryon, we draw a conclusion that the QDCSM must be extended, and the simple and effective extended way is to add short cut-off one pion exchange in the Hamilton.