Skyrme-Like Model And Soliton Picture Of Nucleons

This thesis mainly studies Skyrme-like model and soliton picture of nucleons inthis model. In the process, we emphasize the soliton stability. The thesis is dividedinto four parts, with the structure as follows:The first chapter is the introduction section. We firstly introduce the backgroundof the particle physics knowledge, systematically describe the basics and developmentof particle physics, both in theoretically and experimentally, in which focus is given tothe quarks model and related theories, the quantum chromodynamics and the relatedknowledge, the hadron-related knowledge and a set of important model on lighthadrons.In the second chapter, we consider the extended Skyrme model with theanti-commutator of the chiral current. By deducing the equations of motion ofextended Skyrme model, the spherically symmetric Skyrmion is numericallysimulated. After the zero-mode quantization of the model, the static properties ofnucleons are calculated and the connection of the anti-commutator of the chiralcurrent with QCD is discussed.In the third chapter, the role of anti-commutator term of the chiral current inSkyrme-like model was studied associated with the symmetric Skyrmion and thenucleon properties in terms of the zero-mode quantization. It is shown that theSkyrmion is stable only when the anti-commutator term in the model has a negativecoupling constant(κ2) while a QCD functional analysis gives a positive couplingconstant. This implies either the coupling is negligiblely small and negative, or thesoliton picture for the baryons is beyond the approximation of QCD at the level ofquark loop.In the four chapter of this paper, we summarized the main results of this paperand give the prospect of further research in this field...