Abstract
This white paper summarizes the scientific opportunities for utilization of the upgraded 12 GeV Continuous Electron Beam Accelerator Facility (CEBAF) and associated experimental equipment at Jefferson Lab. It is based on the 52 proposals recommended for approval by the Jefferson Lab Program Advisory Committee.The upgraded facility will enable a new experimental program with substantial discovery potential to address important topics in nuclear, hadronic, and electroweak physics.
Highlights
We are at the dawn of a new era in the study of hadronic nuclear physics
The upgrade of Continuous Electron Beam Accelerator Facility (CEBAF) and associated experimental equipment at Jefferson Lab is presently underway, with completion expected in FY15
A key mission of the new Jefferson Lab Physics Analysis Center is to establish a state-of-the-art framework for such analyses, building on, and networking with, global theoretical and phenomenological expertise. The application of such techniques to forthcoming results from CEBAF Large Acceptance Spectrometer 12 GeV (CLAS12) and GlueX on both meson and baryon photo and electroproduction is essential for laying the foundation for robust partial wave analyses, and so ensuring the capability of these experiments to establish the existence of states in which gluonic degrees of freedom are excited
Summary
We are at the dawn of a new era in the study of hadronic nuclear physics. The non-Abelian nature of Quantum Chromodynamics (QCD) and the resulting strong coupling at low energies represent a significant challenge to nuclear and particle physicists. The last decade has seen the development of new theoretical and experimental tools to quantitatively study the nature of confinement and the structure of hadrons comprised of light quarks and gluons. Together these will allow both the spectrum and the structure of hadrons to be elucidated in unprecedented detail. Multidimensional images of hadrons with great promise to reveal the dynamics of the key underlying degrees of freedom will be produced These multidimensional distributions open a new window on the elusive spin content of the nucleon through observables that are directly related to the orbital angular momenta of quarks and gluons.
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