Interactions Between Nucleon And Zero-Strangeness Mesons With Singly Heavy Quark

The chiral SU(3) and the extended chiral SU(3) quark models have obtained quite successes in interpreting light hadronic physics. In this thesis, these two models are applied to preliminarily investigate the interactions between nucleon and zero-strangeness mesons with singly heavy quark by solving the resonating group method equation.Firstly, S-wave ND and ND* interactions with possible quantum numbers are studied. The results show that the interactions between N and D or D* are attractive, and the attractions dominantly come from a exchange between light quarks. What is more, the attractions in the extended chiral SU(3) quark model are greater than those in the chiral SU(3) quark model. By solving RGM equation, ND and ND* bound states can be obtained, except that the states of (ND)J=1/2 and (ND*)J=3/2 with the isospin 0 and the state of (ND*)J=1/2 with the isospin 1 in the chiral SU(3) quark model. Meanwhile, the S-, P-, D-wave N and D(D*) elastic scattering phase shifts are studied, and the information from S-wave ND and ND* elastic scattering phase shifts are qualitatively in good agreement with that from the previous interactions and bound-state problems.Further analysis shows that (ND)J=1/2 and (ND*)J=3/2 states with the isospin 0 in the extended chiral SU(3) quark model could correspond to the new hadrons Σc(2800) and Λc(2940)+. Briefly, In our current study, the observed Σc(2800) anΛc2940)+ may be explained as ND molecular state with I=0,J=1/2 and ND* molecular state with I=0,J=3/2, respectively. This conclusion conforms to those from other theoretical methods.Secondly, the same research processes are applied to NB and NB* systems, which include the interactions between N and B(B*)the bound states and the elastic scattering phase shifts. The results also show that the interactions between N and B or B* are attractive and the attractions dominantly come from a exchange between light quarks. In addition, the attractive forces are strong enough to form NB and NB* bound states, except (NB*)j=3/2 with the isospin 0 and (NB*)J=1/2 with the isospin 1 in the chiral SU(3) quark model. Meanwhile, compared with ND and ND*, the binding energies are higher about 0-15 MeV, and the curves of the S-, P-,D-wave elastic scattering phase shifts are quite similar, except the amplitudes are a little higher which means that the interactions are more attractive.Finally, S-wave N(?) and N(?)*、N(?) and N(?)* are also studied in the chiral SU(3) quark model and the extended chiral SU(3) quark model by solving RGM equation. However, most of the interactions between N and (?) ((?)*)、N and (?) ((?)*) are not attractive, which means that they could not form stable bound states. The elastic scattering phase shifts of S-wave indicate repulsive forces and the P-,D-waves do little contribution. In addition, ND S-wave elastic scattering phase shifts consist with the results from some other theoretical methods.