Coupled Channels Multi-component states of different configurations. Each component describes the probability to find the corresponding configuration in the scattering area.

Meson + Meson  →  quark + antiquark  →  Meson + Meson

Y.S. Kalashnikova    (2005)

C. Albertus and collaborators    (2006)

DsJ(2317)    (2003)

DsJ(2460)    (2004)

DsJ(2860)    (2006)

Y(3940)    (2005)