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Title: Neutron single spin asymmetries from semi-inclusive deep inelastic scattering off transversely polarized {sup 3}He

Abstract

A study of semi-inclusive deep inelastic scattering off transversely polarized {sup 3}He is presented. The formal expressions of the Collins and Sivers contributions to the azimuthal single spin asymmetry for the production of leading pions are derived, in impulse approximation, and estimated in the kinematics of forth-coming experiments at JLab. The AV18 interaction has been used for a realistic description of the nuclear dynamics; the nucleon structure has been described by proper parametrizations of data or suitable model calculations. The initial transverse momentum of the struck quark has been properly included in the calculation. The crucial issue of extracting the neutron information from {sup 3}He data, planned to shed some light on the puzzling experimental scenario arisen from recent measurements for the proton and the deuteron, is thoroughly discussed. It is found that a model independent procedure, widely used in inclusive deep inelastic scattering to take into account the momentum and energy distributions of the bound nucleons in {sup 3}He, can be applied also in the kinematics of the planned JLab experiments, although fragmentation functions, not only parton distributions, are involved. The possible role played by final state interactions in the process under investigation is addressed.

Authors:
 [1]
  1. Dipartimento di Fisica, Universita degli Studi di Perugia, and INFN, sezione di Perugia via A. Pascoli 06100 Perugia (Italy) and Departament de Fisica Teorica, Universitat de Valencia, 46100 Burjassot (Valencia) (Spain)
Publication Date:
OSTI Identifier:
21020052
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.75.054005; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; CEBAF ACCELERATOR; DEEP INELASTIC SCATTERING; DEUTERONS; ENERGY SPECTRA; FINAL-STATE INTERACTIONS; HELIUM 3; IMPULSE APPROXIMATION; NEUTRONS; NUCLEAR FRAGMENTATION; PARTICLE PRODUCTION; PARTICLE STRUCTURE; PIONS; POLARIZATION; PROTONS; QUARKS; SEMI-INCLUSIVE INTERACTIONS; SPIN; TRANSVERSE MOMENTUM; TRITONS

Citation Formats

Scopetta, Sergio. Neutron single spin asymmetries from semi-inclusive deep inelastic scattering off transversely polarized {sup 3}He. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.054005.
Scopetta, Sergio. Neutron single spin asymmetries from semi-inclusive deep inelastic scattering off transversely polarized {sup 3}He. United States. doi:10.1103/PHYSREVD.75.054005.
Scopetta, Sergio. Thu . "Neutron single spin asymmetries from semi-inclusive deep inelastic scattering off transversely polarized {sup 3}He". United States. doi:10.1103/PHYSREVD.75.054005.
@article{osti_21020052,
title = {Neutron single spin asymmetries from semi-inclusive deep inelastic scattering off transversely polarized {sup 3}He},
author = {Scopetta, Sergio},
abstractNote = {A study of semi-inclusive deep inelastic scattering off transversely polarized {sup 3}He is presented. The formal expressions of the Collins and Sivers contributions to the azimuthal single spin asymmetry for the production of leading pions are derived, in impulse approximation, and estimated in the kinematics of forth-coming experiments at JLab. The AV18 interaction has been used for a realistic description of the nuclear dynamics; the nucleon structure has been described by proper parametrizations of data or suitable model calculations. The initial transverse momentum of the struck quark has been properly included in the calculation. The crucial issue of extracting the neutron information from {sup 3}He data, planned to shed some light on the puzzling experimental scenario arisen from recent measurements for the proton and the deuteron, is thoroughly discussed. It is found that a model independent procedure, widely used in inclusive deep inelastic scattering to take into account the momentum and energy distributions of the bound nucleons in {sup 3}He, can be applied also in the kinematics of the planned JLab experiments, although fragmentation functions, not only parton distributions, are involved. The possible role played by final state interactions in the process under investigation is addressed.},
doi = {10.1103/PHYSREVD.75.054005},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 75,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}