Single-Spin Beam Asymmetry in Semi-Exclusive Deep-Inelastic Electroproduction

Abstract

Recent measurements from Jefferson Lab show significant beam single spin asymmetries in deep inelastic scattering. The asymmetry is due to interference of longitudinal and transverse photoabsorption amplitudes which have different phases induced by the final-state interaction between the struck quark and the target spectators. We developed a dynamical model for a single-spin beam asymmetry in deep-inelastic scattering. Our results are consistent with the experimentally observed magnitude of this effect. We conclude that similar mechanisms involving quark orbital angular momentum (`Sivers effect') are responsible for both target and beam single-spin asymmetries.

arXiv comment4 pages, 2 figures, talk presented by AA at the Conference on the Intersections of Particle and Nuclear Physics (CIPANP 2003), New York City, May 2003

References in corpus (2)

• Transverse Polarisation of Quarks in Hadrons
• Measurement of Beam-Spin Asymmetries for Deep Inelastic ${\pi }^{+}$ Electroproduction

Cited by in corpus (7)

• Light-cone divergence in twist-3 correlation functions
• Beam Single-Spin Asymmetry in Semi-Inclusive Deep Inelastic Scattering
• Transversity distribution in spin asymmetries in semi-inclusive DIS and in the Drell-Yan process
• Sivers effect in semi-inclusive deeply inelastic scattering and Drell-Yan
• New Perspectives for QCD: The Novel Effects of Final-State Interactions and Near-Conformal Effective Couplings
• Models for TMDs and numerical methods
• Novel QCD Aspects of Hard Diffraction, Antishadowing, and Single-Spin Asymmetries