New Results in Light-Front Phenomenology

Abstract

The light-front quantization of gauge theories such as QCD in light-cone gauge provides a frame-independent wavefunction representation of relativistic bound states, simple forms for current matrix elements, explicit unitarity, and a trivial vacuum. 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 and to define a kinematical definition of angular momentum. The AdS/CFT correspondence of large $N_C$ 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 analyses 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.

Presented at LightCone 2004, Amsterdam, The Netherlands, 16-20 August 2004

References in corpus (7)

• Confirmation of the Double Charm Baryon Xi_cc+ via its Decay to p D+ K-
• Nuclear Transparency in 90 Degree c.m. Quasielastic A(p,2p) Reactions
• Hard diffraction from parton rescattering in QCD
• Statistical Physics and Light-Front Quantization
• Generalised Parton Distributions of the Pion on the Transverse Lattice
• A quadratic potential in a light cone QCD inspired model
• Bound States in the LFD Yukawa Model

Cited by in corpus (12)

• The Charm Parton Content of the Nucleon
• Low Energy Precision Test of Supersymmetry
• Confinement contains condensates
• Light-Cone Models for Intrinsic Charm and Bottom
• Open charm hadroproduction and the charm content of the proton
• Measurement of the differential photon+ c-jet cross section and the ratio of differential photon+ c and photon+ b cross sections in proton-antiproton collisions at sqrt(s) = 1.96 TeV
• The Ratio $R=F_L/F_T$ in DIS as a Probe of the Charm Content of the Proton
• Azimuthal Asymmetries in DIS as a Probe of Intrinsic Charm Content of the Proton
• Azimuthal Dependence of the Heavy Quark Initiated Contributions to DIS
• The Physics of Heavy Quark Distributions in Hadrons: Collider Tests
• Azimuthal Asymmetry and Ratio $R=F_L/F_T$ as Probes of the Charm Content of the Proton
• Spin Effects in Quantum Chromodynamics and Recurrence Lattices with Multi-Site Exchanges