# Neutron Parton Structure And The Light-Front Spectral Function Of 3He

## TL;DR

This paper investigates the neutron's parton structure within polarized helium-3 using both non-relativistic and relativistic frameworks, introducing a light-front spectral function approach to improve the extraction of neutron asymmetries.

## Contribution

It presents a novel light-front Hamiltonian dynamics method for a Poincaré covariant description of nuclear structure, advancing the analysis of neutron properties in nuclear environments.

## Key findings

- A simple procedure for extracting neutron asymmetries from helium-3 data.
- Preliminary results on the role of relativity in the EMC effect.
- Outline of a generalized method within light-front dynamics.

## Abstract

Semi-inclusive deep inelastic electron scattering off polarized 3He is studied in a non-relativistic framework, using a distorted spin-dependent spectral function for 3He to take care of the final state interaction between the observed pion and the remnant. A simple procedure is shown to be valuable for the extraction of Sivers and Collins asymmetries for the neutron fromthe corresponding asymmetries for 3He. To extend this study in a relativistic framework, a novel approach for a Poincar\'e covariant description of nuclear dynamics is presented, based on the light-front Hamiltonian dynamics. The key quantity is the light-front spectral function, where both normalization and momentum sum rule can be satisfied at the same time. Preliminary results are discussed for an initial analysis of the role of relativity in the EMC effect in 3He, and the generalization of the procedure for the extraction of neutron asymmetries within the light-front dynamics is outlined.