Conveners
Parallel session B6
- Richard Tyson (University of Glasgow)
The world’s largest sample of $J/\psi$ events accumulated at the BESIII detector offers a unique opportunity to investigate $\eta$ and $\eta'$ physics via two body $J/\psi$ radiative or hadronic decays. In recent years the BESIII experiment has made significant progresses in $\eta$/$\eta'$ decays. A selection of recent highlights in light meson decays at BESIII are reviewed in this report,...
There are many states predicted by quantum chromodynamics (QCD) that haven’t been observed experimentally. Furthermore, QCD predicts mesons that cannot exist according to the naive quark model, known as exotic mesons, which include glueballs, hybrid mesons, tetraquarks and meson molecules. The identification and study of these new forms of matter are of great importance to better understand...
The study of $\eta^{(\prime)}\pi$ photoproduction is particularly interesting for the search for the lowest lying hybrid meson with exotic quantum numbers, the $\pi_1(1600)$, at the GlueX experiment at Jefferson Lab. In this talk, I will present a model based on the double-Regge exchange of vector trajectories for photoproduction at high energies. The model successfully describes CLAS data at...
The light scalar meson sector, encompassing mesons with mass around 1 GeV and positive parity, is not fully understood. This lack of understanding is due to the overlap of the widths of neighboring resonances and the numerous underlying background processes. This work seeks to shed some light onto one member of this sector, namely the neutral $a_0^{0}$(980) meson, by way of polarized...
The GlueX experiment, located in Hall D at Jefferson Lab, aims to map the full spectrum of light-quark mesons with an emphasis on hybrid mesons, states in which the gluonic field is excited and contributes to the quantum numbers of the meson. The experiment employs a linearly polarized photon beam produced via coherent bremsstrahlung with an energy around $8.2$-$8.8~\mathrm{GeV}$ on a liquid...
