Q-balls in the Wick-Cutkosky model
  In the present paper Q-ball solutions in the Wick--Cutkosky model are examined in detail. A remarkable feature of the Wick--Cutkosky model is that it admits analytical treatment for the most part of the analysis of Q-balls, which allows one to use this simple model to demonstrate some peculiar properties of Q-balls. In particular, a method for estimating the binding energy of a Q-ball is proposed. This method is tested on the Wick--Cutkosky model taking into account the well-known results obtained for this model earlier. 
E.Ya. Nugaev, M.N. Smolyakov
hep-th hep-ph