Related Experiment Video
Updated: May 11, 2026
07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Generalized parton distributions in the valence region from deeply virtual Compton scattering
Michel Guidal1, Hervé Moutarde, Marc Vanderhaeghen
1Institut de Physique Nucléaire Orsay, CNRS-IN2P3, Université Paris-Sud, France.
Summary
This review explores generalized parton distributions (GPDs) and deeply virtual Compton scattering to understand nucleon quark structure. Current measurements constrain GPDs, with future research focusing on advanced parametrizations and experimental directions.
Area of Science:
- Nuclear Physics
- Particle Physics
- Quantum Chromodynamics
Background:
- Generalized Parton Distributions (GPDs) offer a unique window into the nucleon's internal structure.
- Deeply Virtual Compton Scattering (DVCS) is a key process for probing GPDs.
- Understanding the quark structure of the nucleon is a fundamental goal in high-energy physics.
Purpose of the Study:
- To review recent advancements in GPDs and DVCS within the valence region.
- To analyze how current experimental data constrains GPD models.
- To discuss state-of-the-art GPD parametrizations and future research avenues.
Main Methods:
- Review of theoretical frameworks for GPDs.
- Analysis of experimental results from DVCS measurements.
- Examination of phenomenological GPD parametrization techniques.
Main Results:
- Current measurements provide significant constraints on GPDs.
- Several advanced GPD parametrizations have been developed and tested.
- The valence region offers crucial insights into nucleon structure.
Conclusions:
- GPDs and DVCS are powerful tools for elucidating nucleon quark structure.
- Ongoing experimental and theoretical efforts are refining our understanding.
- Future research will focus on improved GPD models and new experimental probes.
Related Concept Videos
01:14Atomic Nuclei: Nuclear Spin State Population Distribution
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
02:38Valence Bond Theory and Hybridized Orbitals
According to valence bond theory, a covalent bond results when: (1) an orbital on one atom overlaps an orbital on a second atom, and (2) the single electrons in each orbital combine to form an electron pair. The strength of a covalent bond depends on the extent of overlap of the orbitals involved. Maximum overlap is possible when the orbitals overlap on a direct line between the two nuclei.
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...
A σ bond (single bond in a Lewis structure) is a covalent bond in which the electron density is...
01:21Energy Associated With a Charge Distribution
The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a collection of point charges, the total work done can be expressed in terms of the product of each pair of charges divided by their separation distance, defined with respect to a suitable origin. Solving this expression gives the energy stored in a point charge distribution.
01:27π Electron Effects on Chemical Shift: Overview
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0, resulting in...
02:42Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
02:45Valence Bond Theory
Overview of Valence Bond Theory