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Title: QCD Phenomenology and Light-Front Wavefunctions

Abstract

A natural calculus for describing the bound-state structure of relativistic composite systems in quantum field theory is the light-front Fock expansion which encodes the properties of a hadrons in terms of a set of frame-independent n-particle wavefunctions. Light-front quantization in the doubly-transverse light-cone gauge has a number of remarkable advantages, including explicit unitarity, a physical Fock expansion, the absence of ghost degrees of freedom, and the decoupling properties needed to prove factorization theorems in high momentum transfer inclusive and exclusive reactions. A number of applications are discussed in these lectures, including semileptonic B decays, two-photon exclusive reactions, diffractive dissociation into jets, and deeply virtual Compton scattering. The relation of the intrinsic sea to the light-front wavefunctions is discussed. Light-front quantization can also be used in the Hamiltonian form to construct an event generator for high energy physics reactions at the amplitude level. The light-cone partition function, summed over exponentially weighted light-cone energies, has simple boost properties which may be useful for studies in heavy ion collisions. I also review recent work which shows that the structure functions measured in deep inelastic lepton scattering are affected by final-state rescattering, thus modifying their connection to light-front probability distributions. In particular, the shadowingmore » of nuclear structure functions is due to destructive interference effects from leading-twist diffraction of the virtual photon, physics not included in the nuclear light-cone wavefunctions.« less

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
798925
Report Number(s):
SLAC-PUB-9056
TRN: US0205091
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 21 Nov 2001
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; BOUND STATE; COMPTON EFFECT; DEGREES OF FREEDOM; HEAVY IONS; HIGH ENERGY PHYSICS; LIGHT CONE; MOMENTUM TRANSFER; NUCLEAR STRUCTURE; PARTITION FUNCTIONS; QUANTUM CHROMODYNAMICS; QUANTUM FIELD THEORY; STRUCTURE FUNCTIONS

Citation Formats

Brodsky, Stanley J. QCD Phenomenology and Light-Front Wavefunctions. United States: N. p., 2001. Web. doi:10.2172/798925.
Brodsky, Stanley J. QCD Phenomenology and Light-Front Wavefunctions. United States. doi:10.2172/798925.
Brodsky, Stanley J. Wed . "QCD Phenomenology and Light-Front Wavefunctions". United States. doi:10.2172/798925. https://www.osti.gov/servlets/purl/798925.
@article{osti_798925,
title = {QCD Phenomenology and Light-Front Wavefunctions},
author = {Brodsky, Stanley J.},
abstractNote = {A natural calculus for describing the bound-state structure of relativistic composite systems in quantum field theory is the light-front Fock expansion which encodes the properties of a hadrons in terms of a set of frame-independent n-particle wavefunctions. Light-front quantization in the doubly-transverse light-cone gauge has a number of remarkable advantages, including explicit unitarity, a physical Fock expansion, the absence of ghost degrees of freedom, and the decoupling properties needed to prove factorization theorems in high momentum transfer inclusive and exclusive reactions. A number of applications are discussed in these lectures, including semileptonic B decays, two-photon exclusive reactions, diffractive dissociation into jets, and deeply virtual Compton scattering. The relation of the intrinsic sea to the light-front wavefunctions is discussed. Light-front quantization can also be used in the Hamiltonian form to construct an event generator for high energy physics reactions at the amplitude level. The light-cone partition function, summed over exponentially weighted light-cone energies, has simple boost properties which may be useful for studies in heavy ion collisions. I also review recent work which shows that the structure functions measured in deep inelastic lepton scattering are affected by final-state rescattering, thus modifying their connection to light-front probability distributions. In particular, the shadowing of nuclear structure functions is due to destructive interference effects from leading-twist diffraction of the virtual photon, physics not included in the nuclear light-cone wavefunctions.},
doi = {10.2172/798925},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Nov 21 00:00:00 EST 2001},
month = {Wed Nov 21 00:00:00 EST 2001}
}

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