In the talk the concept of hadronic molecules is introduced and the implications of this structure illustrated on three examples: The nature of the Y(4230), the Zb states and finally the LHCb pentaquarks. In particular, it is described which features of the LHCb pentaquarks point at their possible molecular nature and what further predictions can be deduced from that property.
The chiral unitary approach produces two states from the pseudoscalar-baryon decuplet interaction in the region of the $ \Xi(1820)$. A recent BESIII experiment on the $ \Psi(3868) \to \bar \Xi K^- \Lambda$ showed a clean peak that had an abnormally large width and was interpreted in [1] in terms of the two $\Xi(1820)$. In view of this, we propose to look at the $\Omega_c \to \pi^+ \,...
The low-energy QCD, the theory within the Standard Model describing the strong interaction, is still missing fundamental experimental results to achieve a breakthrough in its understanding. Among these, the low-energy kaon-nucleon/nuclei interaction studies are playing a key-role.
Combining the excellent quality of the low-energy kaon beam delivered by the DAFNE collider of INFN-LNF with new...
We have studied the interaction between the eta meson and deuteron from measurement of cross sections for coherent neutral-pion and eta-meson photoproduction on the deuteron. We have found a narrow resonance-like bump in the eta-deuteron subsystem at the vicinity of the threshold, suggesting strong eta-deuteron attraction. The sharp backward-peaking angular dependence of deuteron emission,...
The Σ beam asymmetry in meson photoproduction off the nucleon is a very sensitive observable in the investigation of the nucleon structure. The BGOOD experiment at ELSA, with its linearly polarized γ beam and large solid angle detector, is an ideal facility for the detection of charged and neutral particle final states.
New results of Σ beam asymmetry will be presented for η photoproduction...
