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A journey into the proton structure: Progresses and challenges

Francesco Giovanni Celiberto
Oct 2022
摘要
Unraveling the inner dynamics of gluons and quarks inside nucleons is aprimary target of studies at new-generation colliding machines. Finding ananswer to fundamental problems of Quantum ChromoDynamics, such as the origin ofnucleon mass and spin, strongly depends on our ability of reconstructing the 3Dmotion of partons inside the parent hadrons. We present progresses andchallenges in the extraction of TMD parton densities, with particular attentionto the ones describing polarization states of gluons, which still represent anlargely unexplored field. Then, we highlight connections with correspondingparton densities in the high-energy limit, the so-called unintegrated gluondistributions or UGDs and, more in general, to recent developments inhigh-energy physics.
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