Solving Hadronic Relativistic Equation And Its Applications

Recently researching on particle physics is a mature subject, but a series of issues which researchers focused on are presence. A lot of particles excitation spectrum was discovered by the experiment, exotic stateZc (3900) and Zc (4025) had been found in recent experiments, these particles are really made of four quarks or molecular states formed by the interaction of two D measons which is expected to further explore.The paper discussed the numerical solution of hadron for relativistic quark model the energy spectrum and the wavefunction of hadronic was obtained by calculation. The conclusion was:spin-spin coupling energy which between Heavy quark and light quark is very important for reproducing of heavy flavor mesons (pseudoscalar and vector) mass spectrum; isospin breaking correction are computed using chiral quark model, the electromagnetic component of the mass splitting due to mass and electric charge different between up and down quark; The mass splitting of ground state nucleons due to the hyperfine strong and electromagnetic component of the mass splitting.This paper is divided into four chapters, the main contents are as followsThe first chapter is a introduction part, introduced some basic knowledge of particle physics, including the QCD and the standard model, flavor symmetry and the quark model, hadron spectroscopy, model and phenomenology of hadrons, chiral symmetry and dynamics, large NcQCD.The main research work have been introduced in the next two chapters, The main content of the second chapter is use relativistic potential quark model to study the heavy-light mesons,we joined the Cornell potential in the model, spin-spin coupling energy was considered in the solving process.Finally, various D meson ground state energy and S wave low excited state energy was obtained, The results show that except coupling channel lead to mass move, the different value between Heavy flavour pesudoscalar meson and vector meson owing to spin coupling energy. The main content of the third chapter is as follow,hyperfine structure of ground-state nucleons is studied by studying the isospin breaking effect due to the non-zero differences of mass and electromagnetic interaction between the up and down quarks.The electromagnetic components of mass splitting and that due to non-degenerated quark mass are computed using chiral quark model.It is shown the isospin breaking corrections to the baryon mass are of the order of one percent relatively to hadronic energies. The computed mass splittings due to the hyperfine strong and the electromagnetic corrections are in good agreement with the recent data of the baryon mass splittings.Finally, we summarize the main results and give an outlook of the future in this field.