A Light-Front approach to the He spectral function
arXiv:1411.7559 · doi:10.1007/s00601-014-0935-y
Abstract
The analysis of semi-inclusive deep inelastic electron scattering off polarized He at finite momentum transfers, aimed at the extraction of the quark transverse-momentum distributions in the neutron, requires the use of a distorted spin-dependent spectral function for He, which takes care of the final state interaction effects. This quantity is introduced in the non-relativistic case, and its generalization in a Poincaré covariant framework, in plane wave impulse approximation for the moment being, is outlined. Studying the light-front spin-dependent spectral function for a J=1/2 system, such as the nucleon, it is found that, within the light-front dynamics with a fixed number of constituents and in the valence approximation, only three of the six leading twist T-even transverse-momentum distributions are independent.
6 pages, 1 figure, invited talk at the Conference "Light Cone 2014 (LC2014)", Raleigh, North Carolina, May 26-30, 2014. Submitted to Few-Body Systems
References in corpus (6)
- Investigations into the flavor dependence of partonic transverse momentum
- Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized He Target
- Neutron single spin asymmetries from semi-inclusive deep inelastic scattering off transversely polarized He
- Conventional nuclear effects on generalized parton distributions of trinucleons
- Semi-inclusive Deep Inelastic Scattering off Few-Nucleon Systems: Tagging the EMC Effect and Hadronization Mechanisms with Detection of Slow Recoiling Nuclei
- Distorted spin-dependent spectral function of an A=3 nucleus and semi-inclusive deep inelastic scattering processes