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Title: Light-Front Holography and Novel Effects in QCD

Abstract

The correspondence between theories in anti-de Sitter space and conformal field theories in physical space-time leads to an analytic, semiclassical model for strongly-coupled QCD. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. We identify the AdS coordinate z with an invariant light-front coordinate {zeta} which separates the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular momentum. The result is a single-variable light-front Schroedinger equation for QCD which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The mapping of electromagnetic and gravitational form factors in AdS space to their corresponding expressions in light-front theory confirms this correspondence. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates and the behavior of the QCD coupling in the infrared. The distinction between static structure functions such as the probability distributions computed from the square of the light-front wavefunctions versus dynamical structure functions which include the effects of rescattering is emphasized. A new method for computingmore » the hadronization of quark and gluon jets at the amplitude level, an event amplitude generator, is outlined.« less

Authors:
 [1];  [2]
  1. SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94309 (United States)
  2. Universidad de Costa Rica, San Jose (Costa Rica)
Publication Date:
OSTI Identifier:
21300481
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1116; Journal Issue: 1; Conference: 13. Mexican school of particles and fields, Hermosillo (Mexico); San Carlos (Mexico), 2-11 Oct 2008; Other Information: DOI: 10.1063/1.3131569; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTI DE SITTER SPACE; COMPTON EFFECT; CONFORMAL INVARIANCE; COUPLING; FORM FACTORS; GLUON CONDENSATION; GLUONS; HADRONS; HOLOGRAPHY; JET MODEL; ORBITAL ANGULAR MOMENTUM; QUANTUM CHROMODYNAMICS; QUARKS; SCHROEDINGER EQUATION; SEMICLASSICAL APPROXIMATION; SPACE-TIME; SPIN; STRUCTURE FUNCTIONS; WAVE FUNCTIONS

Citation Formats

Brodsky, Stanley J, and Teramond, Guy F. de. Light-Front Holography and Novel Effects in QCD. United States: N. p., 2009. Web. doi:10.1063/1.3131569.
Brodsky, Stanley J, & Teramond, Guy F. de. Light-Front Holography and Novel Effects in QCD. United States. doi:10.1063/1.3131569.
Brodsky, Stanley J, and Teramond, Guy F. de. Mon . "Light-Front Holography and Novel Effects in QCD". United States. doi:10.1063/1.3131569.
@article{osti_21300481,
title = {Light-Front Holography and Novel Effects in QCD},
author = {Brodsky, Stanley J and Teramond, Guy F. de},
abstractNote = {The correspondence between theories in anti-de Sitter space and conformal field theories in physical space-time leads to an analytic, semiclassical model for strongly-coupled QCD. Light-front holography allows hadronic amplitudes in the AdS fifth dimension to be mapped to frame-independent light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons at the amplitude level. We identify the AdS coordinate z with an invariant light-front coordinate {zeta} which separates the dynamics of quark and gluon binding from the kinematics of constituent spin and internal orbital angular momentum. The result is a single-variable light-front Schroedinger equation for QCD which determines the eigenspectrum and the light-front wavefunctions of hadrons for general spin and orbital angular momentum. The mapping of electromagnetic and gravitational form factors in AdS space to their corresponding expressions in light-front theory confirms this correspondence. Some novel features of QCD are discussed, including the consequences of confinement for quark and gluon condensates and the behavior of the QCD coupling in the infrared. The distinction between static structure functions such as the probability distributions computed from the square of the light-front wavefunctions versus dynamical structure functions which include the effects of rescattering is emphasized. A new method for computing the hadronization of quark and gluon jets at the amplitude level, an event amplitude generator, is outlined.},
doi = {10.1063/1.3131569},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1116,
place = {United States},
year = {2009},
month = {4}
}