Conveners
Parallel session A5
- Wolfgang Schafer (Institute of Nuclear Physics PAS)
We discuss central exclusive production (CEP) of $\eta$ and $\eta'(958)$ mesons in diffractive proton-proton collisions at high energies [1]. The amplitudes, including pomeron and $f_{2 R}$-reggeon exchanges, are calculated within the tensor-pomeron model. Absorption effects are also taken into account at the amplitude level. We fit some undetermined model parameters (coupling constants and...
Proton--proton collisions at a beam energy of 4.5 GeV, measured with the HADES detector at GSI, provide a great opportunity to study the production mechanisms of mesons. At this energy, the production of mesons occurs in the transition region between near-threshold energies, well described by effective Lagrangian models, and the regime, where Regge phenomenology can be applied. Measurements at...
The unique nature of QCD leads to a rich spectrum of hadronic resonances. It is well understood that hadronic resonances, which arise from genuine QCD dynamics, are typically identified through peaks in the invariant mass distributions in experiments. However, there are also kinematic effects which produce peaks even though they don't correspond to any underlying QCD effect. One such example...
The GlueX experiment in Hall D at Jefferson Lab is designed for studies of the light meson spectrum with an emphasis on searches for hybrid mesons that have exotic quantum numbers and therefore cannot be classified as conventional hadrons. The experimental facility employs a tagged linearly polarized photon beam in the energy range from 8.2 to 8.8 GeV incident on a liquid hydrogen fixed...
