Speaker
Description
Charged mesons in the charmonium mass region are a clear indication of the existence of states beyond the naive quark model. After the discovery of the Zc(3900) and Zc(4020) by the BESIII and Belle Collaborations, the Zcs(3985) was discovered by the BESIII Collaboration in the K+ recoil mass spectrum in e+e- collisions.
A natural explanation of the Zc states in the quark model can be obtained as charmed meson molecules, that allows to introduce the neccessary light degrees of freedom, since the states are close to these thresholds. If one then change a light quark by an strange quark, one should expect to have some strange partners.
In this contribution we will show the results of such a picture in a chiral quark model that have been widely use in the study of heavy hadrons.
