Currently, the K-matrix tutorial only shows how a Breit-Wigner can be derived from a K-matrix for one channel with one pole and how it compares to a K-matrix with two poles. The tutorial can be easily extended to show how a Flatté lineshape derives from a 2-channel $K$-matrix.
Currently, the K-matrix tutorial only shows how a Breit-Wigner can be derived from a K-matrix for one channel with one pole and how it compares to a K-matrix with two poles. The tutorial can be easily extended to show how a Flatté lineshape derives from a 2-channel$K$ -matrix.