Dispersive approaches for three-particle final states interaction
  In this work, we present different representations of Khuri-Treiman equation, the advantage and disadvantage of each representations are discussed. Using a toy model for scattering amplitude, we study the sensitivity of solution of KT equation to the left hand cut of this toy model and to the different approximate methods. At last, we briefly discuss Watson's theorem when three particles in final states are involved. 
Peng Guo, I. V. Danilkin and Adam P. Szczepaniak
hep-ph