Speaker
Elena Solovieva
(MIPT, LPI RAS)
Description
The $\Xi_c$ states consist of a combination of a charm quark, a strange quark, and an up or down quark. The ground-state $\Xi_c^0$ and $\Xi_c^+$ are the only members of the group that decay weakly, and their masses, lifetimes, and many of their decay modes have been measured.
The $\Xi_c$ states also exist in many angular momentum configurations of the constituent quarks, each as an isospin pair. These excited states have been found to decay either electromagnetically or strongly in three different general types of decay:
to the $\Xi_c$ ground states together with mesons and/or photons, to final states that include a $\Lambda_c^+$ and a kaon, and to $\Lambda D$ final states.
The talk will cover recent measurements of the masses and widths of the excited $\Xi_c$ baryons that include a ground-state $\Xi_c$ in their decay chain. All five pairs under investigation have previously been discovered, but in general their masses and intrinsic widths have not been measured precisely.
Primary author
Elena Solovieva
(MIPT, LPI RAS)
