Conveners
Hadron Spectroscopy: Hadron Spectroscopy
- Vincent Mathieu (Complutense University of Madrid)
The study of the spectrum and structure of excited nucleon states employing the electroproduction of exclusive reactions is an important avenue for exploring the nature of the non-perturbative strong interaction. The CLAS detector in Hall~B has provided the dominant part of the available world data on all relevant meson electroproduction channels off the nucleon in the resonance region for...
Nucleon state in one unitary octet with Lambda(1330), Sigma(1475),and Xi(1620) is discussed. It seems to be possible that its mass is below the Delta. We derive bounds for the properties of such states. Some of these are new [recent evidences came from COSY for Sigma(1475) and Belle for Xi(1620)], while others improve upon
existing limits. We discuss the nature of N' states, and their unitary...
The GlueX experiment at Jefferson Lab aims to study the light meson spectrum with an emphasis on the search for hybrid mesons. To this end, a linearly-polarized $9\,$GeV photon beam impinges on a hydrogen target contained within a hermetic detector with near-complete neutral and charged particle coverage. In 2018, the experiment completed its first phase of data taking in its design...
Three-body unitarity puts important constraints on the form of the scattering amplitudes required for the clarification of several puzzles in modern meson and baryon spectroscopy - e.g. Roper-puzzle, kinemaitic (triangle-) singularities in excited state of a1(1260), nature of XYZ states.
In my talk, I will demonstrate, how a minimal form of such a relativistic and unitary scattering amplitude...
