The Study Of Three Quarks Hadronic States In The Chiral SU(3) Quark Model

The spectrum is the extremely effective tool to explore material and micro-structure and has great significance in the history of the physical development. One of important objective of the baryon spectrum research is to use the baryon spectrum to acquaint the interaction between quarks and then study of the baryon structure.It is hoped that the baryon structure can be explanted by the QCD, but it is still difficult to interpret the baryon structure directly from the QCD, because of the non-perturbation feature of the low-energy QCD. The main means to acquaint the baryon structure also relies on QCD model in current. In the QCD model, the constituent quark model(CQM)is most successful. The model assumed that non-relativistic approximation is still valid. The confining quarks describe by the quarks jailed potential, the asymptotic freedom interaction describes by the adscititious perturbation-gluon exchange potential.This thesis only discusses the spectrum of three quarks baryon composed by u, d, s. Construct the orbital space harmonic oscillator wave functions which meets the requirement of the S 3 group replacement in Jacobi coordinate. Then write out the baryon wave function met with the demand of symmetry, and calculate the baryon mass in the chiral SU (3) quark model.The results display that the chiral SU(3) quark model can comparatively well describe the ground properties of the baryon spectrum. However, in the excited states cases, the results show larger deviations that indicate the complexity of the baryon structure. In the quark model, it is only an approximation to consider only valence quarks and essential to consider sea quarks. For this reason, the next work is to consider a mix state.