ΛcN bound states revisited

The one-boson exchange potential model for Lambda N-c is constructed and the possibility of Lambda N-c bound states is examined. We consider an effective Lagrangian for the charmed baryons, Lambda(c), Sigma(c), and Sigma(c)*, reflecting the heavy quark symmetry, chiral symmetry, and hidden local symmetry. We determine the coupling constants using various methods. With the derived nonrelativistic potentials, we study the bound state problem of the Lambda N-c system and relevant coupled channel effects. It is found that molecular bound states of Lambda N-c are plausible, for which the channel couplings of Sigma N-c and Sigma(c)*N are essential.