Remarkable theoretical progress has been achieved during the last decade. PDFs can be experimentally accessed via deep inelastic scattering, by pion and kaon-induced Drell-Yan interactions, charmonium production at moderate energies and hadro-production of direct photons. The mechanism responsible for the generation of mass is the dynamical breaking of the scale invariance in Quantum Chromodynamics and measurements of parton distribution functions (PDFs) are sensitive to this effect and its corollaries. This dichotomy forms a key part of the conundrum of “Emergence of Hadron Mass”. Contrasting to the massiveness of the proton, the pion appears as unnaturally light, although both are of composite nature. The origin of the bulk of visible mass in the Universe is still unknown. Attention: This follow-up workshop will take place by videoconference only.ĭue to the health emergency related to the Coronavirus outbreak (COVID-19), this event is by videoconference only.
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