Applications of Light-Front QCD

Technical Report · Wed Aug 04 00:00:00 EDT 2004

DOI:https://doi.org/10.2172/829726· OSTI ID:829726

Brodsky, S

Light-front Fock state wavefunctions encode the bound state properties of hadrons in terms of their quark and gluon degrees of freedom at the amplitude level. The freedom to choose the light-like quantization four-vector provides an explicitly covariant formulation of light-front quantization and can be used to determine the analytic structure of light-front wave functions. The AdS/CFT correspondence of large N{sub C} supergravity theory in higher-dimensional anti-de Sitter space with supersymmetric QCD in 4-dimensional space-time has interesting implications for hadron phenomenology in the conformal limit, including an all-orders demonstration of counting rules for exclusive processes. String/gauge duality also predicts the QCD power-law behavior of light-front Fock-state hadronic wavefunctions with arbitrary orbital angular momentum at high momentum transfer. The form of these near-conformal wavefunctions can be used as an initial ansatz for a variational treatment of the light-front QCD Hamiltonian. I also briefly review recent work which shows that some leading-twist phenomena such as the diffractive component of deep inelastic scattering, single spin asymmetries, nuclear shadowing and antishadowing cannot be computed from the LFWFs of hadrons in isolation.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 829726
• Report Number(s): SLAC-PUB-10574; TRN: US0405829
• Resource Relation: Other Information: PBD: 4 Aug 2004
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
BOUND STATE
DEEP INELASTIC SCATTERING
DEGREES OF FREEDOM
DUALITY
GLUONS
HADRONS
MOMENTUM TRANSFER
ORBITAL ANGULAR MOMENTUM
QUANTIZATION
QUANTUM CHROMODYNAMICS
QUARKS
SPACE-TIME
SPIN
SUPERGRAVITY
WAVE FUNCTIONS