A Light-Front approach to the $^3$He spectral function
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 Poincar\'e 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.
Keywords
Cite
@article{arxiv.1411.7559,
title = {A Light-Front approach to the $^3$He spectral function},
author = {Sergio Scopetta and Alessio Del Dotto and Leonid Kaptari and Emanuele Pace and Matteo Rinaldi and Giovanni Salmè},
journal= {arXiv preprint arXiv:1411.7559},
year = {2015}
}
Comments
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