Sigmac Dbar and Lamdac Dbar states in a chiral quark model

Details Sigmac Dbar and Lamdac Dbar states in a chiral quark model Sigmac Dbar and Lamdac Dbar states in a chiral quark model

2011-01-03

arxiv.org/abs/1101.0453v1

Phys.Rev.C84:015203,2011

Physics

Nuclear Physics

Nuclear Theory

7 pages,2 figures

Scientific paper

10.1103/PhysRevC.84.015203

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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