Theory of hadronic molecules applied to the XYZ states

Abstract

In recent years data have been accumulated at various experiments about states in the heavy quarkonium mass range that seem to be inconsistent with the most simple variants of the quark model. In this contribution it is demonstrated that most of those data are consistent with a dominant molecular nature of those states. It is also discussed which kind of observables are sensitive to the molecular component and which are not.⋆ e-mail: c.hanhart@fz-juelich.de 1 The very same relation allows one to calculate from, e.g., the ground state binding energy of hydrogen the corresponding Bohr-radius.

Probing new types of Pc states inspired by the interaction between an S -wave charmed baryon and an anticharmed meson in a T¯ doublet state

“…Studying exotic hadronic states can provide useful hints to deepen our understanding of the nonperturbative behavior of quantum chromodynamics (QCD). In the past 16 years, experimentalist have observed more and more charmoniumlike XY Z states and P c states, which have stimulated the development of investigations of exotic hadronic states (see review papers [1][2][3][4][5][6] for more details).…”