Speaker
Description
Nucleons are the most fundamental bound three-body systems in Nature. Higgs boson couplings into QCD produce only a very small part of a baryon's mass and play little role in determining its structure. During the last decade crucial progress has been achieved in the exploration of the spectrum and the structure of nucleon resonances. Studies of exclusive πN, π+π−p, KΛ, and KΣ electroproduction off protons on the evolution of the electrocouplings with photon virtuality Q2 using the CLAS spectrometer have revealed a complex interplay between an inner core of three dressed quarks surrounded by an external meson-baryon cloud. CLAS12 is extending these results into an unexplored Q2 range, spanning the domain of quark momenta where ≈ 50% of hadron mass is generated. In the future, the increase of the CEBAF energy and the upgrade of the CLAS12 spectrometer to study exclusive electroproduction channels at higher luminosities and photon virtualities will offer a unique opportunity to explore how the dominant part of hadron mass and the bound three-quark structure of the resonant states emerge from QCD.
