Sigma_c Dbar and Lambda_c Dbar states in a chiral quark model
Abstract
The S-wave Sigma_c Dbar and Lambda_c Dbar states with isospin I=1/2 and spin S=1/2 are dynamically investigated within the framework of a chiral constituent quark model by solving a resonating group method (RGM) equation. The results show that the interaction between Sigma_c and Dbar is attractive, which consequently results in a Sigma_c Dbar bound state with the binding energy of about 5-42 MeV, unlike the case of Lambda_c Dbar state, which has a repulsive interaction and thus is unbound. The channel coupling effect of Sigma_c Dbar and Lambda_c Dbar is found to be negligible due to the fact that the gap between the Sigma_c Dbar and Lambda_c Dbar thresholds is relatively large and the Sigma_c Dbar and Lambda_c Dbar transition interaction is weak.
Cite
@article{arxiv.1101.0453,
title = {Sigma_c Dbar and Lambda_c Dbar states in a chiral quark model},
author = {W. L. Wang and F. Huang and Z. Y. Zhang and B. S. Zou},
journal= {arXiv preprint arXiv:1101.0453},
year = {2013}
}
Comments
7 pages,2 figures. arXiv admin note: text overlap with arXiv:nucl-th/0606056 by other authors