Neutron orbital structure from generalized parton distributions of 3He
M. Rinaldi, S. Scopetta
TL;DR
This paper analyzes the generalized parton distributions of 3He to extract neutron orbital angular momentum, highlighting the nucleus's unique spin structure that enhances neutron contribution in experimental measurements.
Contribution
It provides a detailed theoretical analysis of 3He GPDs within impulse approximation, proposing a method to access neutron orbital angular momentum experimentally.
Findings
Neutron contribution dominates the sum of GPDs in 3He.
3He's spin structure makes it an ideal target for neutron studies.
Potential to measure neutron orbital angular momentum in future experiments.
Abstract
The generalized parton distribution H and E of the 3He nucleus, which could be measured in hard exclusive processes, such as coherent deeply virtual Compton scattering, are thoroughly analyzed in impulse approximation, within the Av18 interaction. It is found that their sum is dominated to a large extent by the neutron contribution: The peculiar spin structure of 3He makes this target unique for the extraction of the neutron information. This observation could allow to access for the first time, in dedicated experiments, the orbital angular momentum of the partons in the neutron.
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