An introduction to the Generalized Parton Distributions

Abstract

The concepts of Generalized Parton Distributions (GPD) are reviewed in an introductory and phenomenological fashion. These distributions provide a rich and unifying picture of the nucleon structure. Their physical meaning is discussed. The GPD are in principle measurable through exclusive deeply virtual production of photons (DVCS) or of mesons (DVMP). Experiments are starting to test the validity of these concepts. First results are discussed and new experimental projects presented, with an emphasis on this program at Jefferson Lab.

5 pages, 3 figures Proc. Int. Conf. on Quark Nuclear Physics (QNP2002), to be published in Eur. Phys. Jour. A

References in corpus (13)

• Hard Exclusive Reactions and the Structure of Hadrons
• Factorization for hard exclusive electroproduction of mesons in QCD
• Impact Parameter Dependent Parton Distributions and Off-Forward Parton Distributions for $\zeta \to 0$
• Theory of deeply virtual Compton scattering on the nucleon
• Deeply virtual electroproduction of photons and mesons on the nucleon : leading order amplitudes and power corrections
• Measurement of the Beam-Spin Azimuthal Asymmetry Associated with Deeply-Virtual Compton Scattering
• Observation of exclusive DVCS in polarized electron beam asymmetry measurements
• Double distributions and evolution equations
• Measurement of Deeply Virtual Compton Scattering at HERA
• The Spin Structure of the Nucleon
• Testing the handbag contribution to exclusive virtual Compton scattering
• Crossing and Radon Tomography for Generalized Parton Distributions
• Exclusive Leptoproduction of rho^0 Mesons from Hydrogen at Intermediate Virtual Photon Energies

Cited by in corpus (11)

• Tomography of light mesons in light-cone quark model
• Light-front holographic $\rho$-meson distributions in the momentum space
• Leading twist T-even TMDs for the spin-1 heavy vector mesons
• Hard Exclusive Electroproduction of ${\pi }^{+}{\pi }^{-}$ Pairs
• T-odd generalized and quasi transverse momentum dependent parton distribution in a scalar spectator model
• Quark spin-orbit correlations in spin-0 and spin-1 mesons using the light-front quark model
• Wigner distributions and GTMDs in a proton using light-front quark-diquark model
• Spectroscopy of excited quarkonium states in the light-front quark model
• Effect of nuclear medium on the spatial distribution of pions
• Understanding the Valence Quark Structure of the Pion through GTMDs
• TMD Relations: Insights from a Light-Front Quark-Diquark Model