Previously, we extended our chiral SU（3） quark model to include the coupling between the quark and vector chiral fields [Nucl. Phys. A 727（2003）321]. Here we further study the structure of （ΩΩ）ST=oo dibaryon i...Previously, we extended our chiral SU（3） quark model to include the coupling between the quark and vector chiral fields [Nucl. Phys. A 727（2003）321]. Here we further study the structure of （ΩΩ）ST=oo dibaryon in the extended chiral SU（3） quark model by solving a resonating group method equation. The vector meson exchanges effect, hidden colour channel and colour screening effect are investigated, respectively. The results show that the （ΩΩ）ST=oo system is still the deeply bound state in the extended chiral SU（3） quark model in which the vector meson exchanges control the short-range quark-quark interaction, which is similar to the results obtained from the chiral SU（3） quark model. When the model space is enlarged by including the hidden colour channel, it is found that the energy of the hidden colour state ｜CC〉str=-6,ST=oo is much higher than that of the （ΩΩ）ST=oo state, thus the CC channel has little effect on the binding energy of （ΩΩ）ST=oo state. When the error function confinement potential is considered, the bound state property would not change largely. Fhrther, scalar meson mixing is considered. No matter whether θs= -18° or ideal mixing is taken, （ΩΩ）ST=oo state is still a bound state.展开更多
The structure of H dihyperon(DH)is investigated by employing the SU(3)chiral quark model.As the structure of DH,two different conHguations,six-quark cluster configuration and two-cluster configuration,are considered,r...The structure of H dihyperon(DH)is investigated by employing the SU(3)chiral quark model.As the structure of DH,two different conHguations,six-quark cluster configuration and two-cluster configuration,are considered,respectively.The result shows that except the a chiral Held,the overall effect of the other SU(3)chiral fields is destructive in forming a stable DH and the two-cluster configuration is the preferred structure.The resultant mass of DH in a three-coupled-channel calculation in the SU(3)chiral quark model is ranged from 2225 to 2234 MeV.展开更多
A comparatively detailed nonrelativistic investigation of the(p,π^(+))reaction has been made using Single-Nucleon Mechanism.The results show that if eikonal distortion is a good approximation to high and mediwm energ...A comparatively detailed nonrelativistic investigation of the(p,π^(+))reaction has been made using Single-Nucleon Mechanism.The results show that if eikonal distortion is a good approximation to high and mediwm energy scattering,SNM is inadequate to describe the reaction in producing asymmetry.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10675058 and 10475087.
文摘Previously, we extended our chiral SU（3） quark model to include the coupling between the quark and vector chiral fields [Nucl. Phys. A 727（2003）321]. Here we further study the structure of （ΩΩ）ST=oo dibaryon in the extended chiral SU（3） quark model by solving a resonating group method equation. The vector meson exchanges effect, hidden colour channel and colour screening effect are investigated, respectively. The results show that the （ΩΩ）ST=oo system is still the deeply bound state in the extended chiral SU（3） quark model in which the vector meson exchanges control the short-range quark-quark interaction, which is similar to the results obtained from the chiral SU（3） quark model. When the model space is enlarged by including the hidden colour channel, it is found that the energy of the hidden colour state ｜CC〉str=-6,ST=oo is much higher than that of the （ΩΩ）ST=oo state, thus the CC channel has little effect on the binding energy of （ΩΩ）ST=oo state. When the error function confinement potential is considered, the bound state property would not change largely. Fhrther, scalar meson mixing is considered. No matter whether θs= -18° or ideal mixing is taken, （ΩΩ）ST=oo state is still a bound state.
基金Supported in part by the National Natural Science Foundation of China under Grant Nos.1977551B and B15,and Chinese Academy of Sciences under Grant Nos.B78 and B80.
文摘The structure of H dihyperon(DH)is investigated by employing the SU(3)chiral quark model.As the structure of DH,two different conHguations,six-quark cluster configuration and two-cluster configuration,are considered,respectively.The result shows that except the a chiral Held,the overall effect of the other SU(3)chiral fields is destructive in forming a stable DH and the two-cluster configuration is the preferred structure.The resultant mass of DH in a three-coupled-channel calculation in the SU(3)chiral quark model is ranged from 2225 to 2234 MeV.
文摘A comparatively detailed nonrelativistic investigation of the(p,π^(+))reaction has been made using Single-Nucleon Mechanism.The results show that if eikonal distortion is a good approximation to high and mediwm energy scattering,SNM is inadequate to describe the reaction in producing asymmetry.
