Speaker
Description
Visible matter is characterised by a single mass scale; namely, the proton mass. The proton's existence and structure are supposed to be described by quantum chromodynamics (QCD); yet, absent Higgs boson couplings, chromodynamics is scale invariant. Thus, if the Standard Model is truly a part of the theory of Nature, then the distinct qualities of the proton and all its excitations are emergent features of QCD. Indeed, baryons are the most fundamental three-body systems in Nature and the science challenge is to explain how QCD, a Poincare'-invariant quantum non-Abelian gauge theory, builds each of the baryons in the complete spectrum. Meeting this challenge must begin with an elucidation of the impacts of nonperturbatively-generated running-couplings and -masses on baryon properties and interactions. So, this presentation will give special emphasis to the three pillars of EHM -- namely, the running gluon mass, process-independent effective charge, and running quark mass; their role in stabilising QCD; and their measurable expressions in a diverse array of nucleon and resonance observables.
Author & Speaker: Prof. Craig Roberts, Nanjing University, cdroberts@nju.edu.cn
