Conveners
Parallel session A6
- Farah Afzal (Ruhr University Bochum)
Quantum Chromodynamics (QCD) reveals its complexity at large distances and low energies. Understanding the internal structure of the nucleons is therefore essential for a complete understanding of QCD in this regime. Generalized Parton Distributions (GPDs) play a crucial role in this effort, as they provide a means to map both the spatial and the longitudinal momentum distributions of partons...
The $\Sigma^{0}$ hyperon production in proton-proton collision events at GeV beam energies have intriguing dynamics involving multiple hadronic resonances in an interplay that has remained poorly understood. In addition, unraveling this mystery has proven to be an essential step towards novel measurements, such as the rare $\Sigma^{0}$ Dalitz decay ($\Sigma^{0} \rightarrow \Lambda...
The origin of the large single transverse-spin asymmetry (SSA) has been a long-standing mystery in high-energy spin physics since it was first observed experimentally in the late 1970s. Previous theoretical studies have shown that the Sivers effect in a transversely polarized proton could be a source of this large asymmetry. Although the quark Sivers functions have become relatively well...
A polarized antiproton beam would open a broad physics program relevant to meson and hadron-structure studies, ranging from a direct determination of the spin-dependent components of the $\bar{p}p$ total cross section and of spin-flip amplitudes of the antinucleon-nucleon ($\bar{N}N$) interaction to a measurement of the transversity distribution via polarized Drell-Yan processes, as proposed...
The exclusive production of vector mesons in reactions on protons and nuclei induced by real and virtual photons has been the source of much knowledge on the structure of both the produced mesons as well as the targets.
Recently ultraperipheral collisions of protons and nuclei at the LHC have provided data on light vector mesons ($\rho$ and its excited states) as well as heavy quarkonia...
