Speaker
Ulf-G Meißner
Description
The term two-pole structure refers to the fact that particular single states in the hadron spec- trum as listed in the PDG tables are often two states. In this talk, I will discuss in some detail the cases of the two Λ(1405) and the two $D^{0⋆}$(2300) states. I further discuss the consequences for our understanding of bound states in QCD and point out some sins committed in the current literature.