Charm and bottom baryon masses in the combined $1/N_c$ and $1/m_Q$   expansion versus quark model
  A good agreement between a flux tube-based quark model of light baryons (strange and nonstrange) and the $1/N_c$ expansion mass formula has been found in previous studies. In the present work a larger connection is established between the quark model and the $1/N_c$ and $1/m_Q$ expansion method by extending the previous procedure to baryons made of one heavy and two light quarks. The compatibility between both approaches is shown to hold in this sector too. 
C. Semay, F. Buisseret, F. Stancu