$D{\bar{D}}^{\ast }$ and $\pi \psi$ interactions in a unitary coupled-channel approximation

Bao-Xi Sun, Da-Ming Wan, Guang-Yi Tang +1

The $D{\bar{D}}^{\ast }$ interaction via a $\pi \psi$ intermediate state is studied carefully in the isospin $I=1$ sector. By solving the Bethe-Salpeter equation in the unitary coupled-channel…