Possible parallels between multi-quark states in c- and s-quark sectors and the BGO-OD experiment at ELSA

by Prof. Hartmut Schmieden (Physikalisches Institut, Bonn)

Tuesday 26 Feb 2019, 15:15 → 16:15 Europe/Stockholm

12167 (Ångström)

Over the last decade a revolution has occurred in hadron physics.

The discovery of the X(3872) state in the (hidden) charm meson sector by Belle, and the pair of P_C(4380) and P_C(4450) baryon states by LHCb revealed the existence of multi-quark objects beyond the simple quark-antiquark or 3-quark valence configurations.

Many more states have been found until today, the detailed structure of which is still under debate. Nevertheless, the question arises whether similar configurations may exist in the uds sector of light quarks as well.

I will present ideas on why this may be the case, and first results of the BGO-OD experiment at the ELSA electron accelerator of Bonn University which might be interpreted in support of this.