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arXiv · 1101.0453

Sigma_c Dbar and Lambda_c Dbar states in a chiral quark model

W. L. Wang·F. Huang·Z. Y. Zhang·B. S. Zou
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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.

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W. L. Wang, F. Huang, Z. Y. Zhang, B. S. Zou. 2013-05-21. Sigma_c Dbar and Lambda_c Dbar states in a chiral quark model. https://doi.org/10.1103/physrevc.84.015203

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