1999
DOI: 10.1103/physrevd.59.116013
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Orbital angular momentum in deep inelastic scattering

Abstract: In this work we address several issues associated with orbital angular momentum relevant for leading twist polarized deep inelastic scattering. We present a detailed analysis of the light-front helicity operator (generator of rotations in the transverse plane) in QCD. We explicitly show that, the operator constructed from the manifestly gauge invariant, symmetric energy momentum tensor in QCD, in the gauge A + = 0, after the elimination of constraint variables, is equal to the naive canonical form of the light… Show more

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Cited by 109 publications
(170 citation statements)
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“…In addition, it provides a template for the wave functions of an effective quarkdiquark model of the valence Fock state of the proton lightfront wave function. Deep inelastic scattering structure functions and their connection to the spin and orbital angular momentum of the nucleon have been addressed for a dressed quark state in light-front QCD in [19,20] using a similar Fock space expansion of the state. This approach has also been used to investigate the twist-three GPDs in [21].…”
Section: Introductionmentioning
confidence: 99%
“…In addition, it provides a template for the wave functions of an effective quarkdiquark model of the valence Fock state of the proton lightfront wave function. Deep inelastic scattering structure functions and their connection to the spin and orbital angular momentum of the nucleon have been addressed for a dressed quark state in light-front QCD in [19,20] using a similar Fock space expansion of the state. This approach has also been used to investigate the twist-three GPDs in [21].…”
Section: Introductionmentioning
confidence: 99%
“…tor γ + γ 5 [29] and the relative orbital angular momentum operator −i(k 1 ∂ ∂k 2 − k 2 ∂ ∂k 1 ) [16,30,31] in the light-cone representation. Each configuration satisfies the spin sum rule: J z = s z f + s z b + l z .…”
Section: Spin and Orbital Angular Momentum Composition Of Light-cone mentioning
confidence: 99%
“…For example, the model also provides a self-consistent form for the wavefunctions of an effective quark-diquark model of the valence Fock state of the proton wavefunction. A similar approach has recently been used to illustrate the evolution of light-cone helicity and orbital angular momentum operators [16]. A nonperturbative calculation of the electron magnetic moment using the discretized light-cone quantization method [3] is given in Ref.…”
Section: Introductionmentioning
confidence: 99%
“…This situation can be contrasted with the third component of the spin operator in the equal-time case, which is interaction dependent. Explicitly, the light-front helicity operator can be separated into quark and gluon orbital and intrinsic parts at the operator level and the helicity sum rule for the nucleon is given by [3,4],…”
Section: Light-front Spin Operatorsmentioning
confidence: 99%