Features of parton distribution and fragmentation functions
by
Craig Roberts(Nanjing University)
→
GMT
Description
The vast bulk of visible mass emerges from nonperturbative dynamics within QCD. The past decade has revealed the three pillars that support this emergent hadron mass (EHM); namely, a nonzero gluon mass-scale, a process-independent effective charge, and dressed-quarks with constituent-like masses. Theory is now working to expose their manifold and diverse expressions in hadron observables and highlight the types of measurements that can be made in order to validate the paradigm. This presentation will stress the role of EHM in generating nucleon electroweak structure; producing and constraining the dilation of the leading-twist pion distribution amplitude; shaping pion and nucleon parton distribution functions - valence, glue and sea; informing the calculation of fragmentation functions; and moulding pion and proton charge and mass distributions.
