Parton interpretation of the nucleon spin-dependent structure functions

Journal Article · Fri Feb 01 00:00:00 EST 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.733· OSTI ID:5754328

Mankiewicz, L ^[1]; Ryzak, Z ^[2]

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1. Nicolaus Copernicus Astronomical Center, Bartycka 18, PL-00-716 Warsaw (Poland)
2. Lyman Laboratory of Physics, Harvard University, Cambridge, MA (USA)

We discuss the interpretation of the nucleon's polarized structure function {ital g}{sub 2}({ital x}). If the target state is represented by its Fock decomposition on the light cone, the operator-product expansion allows us to demonstrate that moments of {ital g}{sub 2}({ital x}) are related to overlap integrals between wave functions of opposite longitudinal polarizations. In the light-cone formalism such wave functions are related by the kinematical operator {ital scrY}, or light-cone parity. As a consequence, it can be shown that moments of {ital g}{sub 2} give information about the same parton wave function, or probability amplitude to find a certain parton configuration in the target which defines {ital g}{sub 1}({ital x}) or {ital F}{sub 2}({ital x}). Specific formulas are given, and possible applications to the phenomenology of the nucleon structure in QCD are discussed.

• OSTI ID: 5754328
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 43:3; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
NUCLEONS
STRUCTURE FUNCTIONS
ANGULAR MOMENTUM
COMPTON EFFECT
DEEP INELASTIC SCATTERING
ELECTROPRODUCTION
GLUONS
LIGHT CONE
MATRIX ELEMENTS
PARTON MODEL
POLARIZATION
PROBABILITY
QUANTUM CHROMODYNAMICS
QUARKS
SPIN
WAVE FUNCTIONS
BARYONS
BASIC INTERACTIONS
BOSONS
COMPOSITE MODELS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FUNCTIONS
HADRONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
SCATTERING
SPACE-TIME
645204* - High Energy Physics- Particle Interactions & Properties-Theoretical- Strong Interactions & Properties