Twist-3 Single-Spin Asymmetries in Semi-Inclusive Deep-Inelastic Scattering

Abstract

The single spin asymmetries for a longitudinally polarized lepton beam or a longitudinally polarized nucleon target in semi-inclusive deep-inelastic scattering are twist-3 observables. We study these asymmetries in a simple diquark spectator model of the nucleon. Analogous to the case of transverse target polarization, non-vanishing asymmetries are generated by gluon exchange between the struck quark and the target system. It is pointed out that the coupling of the virtual photon to the diquark is needed in order to preserve electromagnetic gauge invariance at the twist-3 level. The calculation indicates that previous analyses of these observables are incomplete.

arXiv comment9 pages, 2 figures, minor changes, version to appear in EPJA

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Cited by in corpus (27)

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• Transverse Quark Spin Effects and the Flavor Dependence of the Boer-Mulders Function
• Collins effect in semi-inclusive deeply inelastic scattering and in electron positron annihilation
• Sivers effect in Drell Yan at RHIC
• Semi-Inclusive Deep Inelastic Scattering in Wandzura-Wilczek-type approximation
• Beam-Spin Asymmetries in the Azimuthal Distribution of Pion Electroproduction
• Subleading-twist effects in single-spin asymmetries in semi-inclusive deep-inelastic scattering on a longitudinally polarized hydrogen target
• Light-cone divergence in twist-3 correlation functions
• Precise Measurements of Beam Spin Asymmetries in Semi-Inclusive ${\pi }^0$ production
• Beam-spin asymmetries from semi-inclusive pion electroproduction
• Insights on non-perturbative aspects of TMDs from models
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• Beam single spin asymmetry of neutral pion production in semi-inclusive deep inelastic scattering
• Transverse momentum dependent twist-three result for polarized Drell-Yan processes
• Beam-helicity asymmetries for single-hadron production in semi-inclusive deep-inelastic scattering from unpolarized hydrogen and deuterium targets
• Double Spin Asymmetries $A_{LT}^{\cos {\varphi }_S}$ and $A_{LT}^{\cos (2{\varphi }_h-{\varphi }_S)}$ in semi-inclusive DIS
• Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
• Single-spin asymmetries in electroproduction of pions on the longitudinally polarized nucleon targets
• Light-Cone Singularities and Transverse-Momentum-Dependent Factorization at Twist-3
• Q^2 dependence of azimuthal asymmetries in semi-inclusive deep inelastic scattering and in Drell-Yan
• Studies of spin-orbit correlations at JLAB
• On the beam spin asymmetries of electroproduction of charged hadrons off the nucleon targets
• Leading and higher twist transverse momentum dependent parton distribution functions in the spectator model
• Sivers effect in semi-inclusive DIS and in the Drell-Yan process