A Numerical Analysis to the {$\pi$} and {K} Coupled--Channel Scalar   Form-factor
  A numerical analysis to the scalar form-factor in the $\pi\pi$ and KK coupled--channel system is made by solving the coupled-channel dispersive integral equations, using the iteration method. The solutions are found not unique. Physical application to the $\pi\pi$ central production in the $pp\to pp\pi\pi$ process is discussed based upon the numerical solutions we found. 
Wei Liu, Hanqing Zheng and Xiao-Lin Chen