Abstract
This project aims at investigating the analytic structure of the two-body scattering S matrix with coupled-channels applied to the exotic meson X(3872). We start with an exercise about the S-matrix poles using a separable potential with a single channel, related to the threshold D0-D*0/D0-D*0, extremely close to the X(3872) mass. Afterwards, we will use a two coupled-channels separable po…