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Article
Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized (3)He Target at Q(2)=1.4–2.7  GeV(2)
Physical Review Letters
  • X. Qian, Duke University
  • Timothy Holmstrom, Longwood University
Document Type
Article
Publication Date
8-10-2011
Abstract

We report the first measurement of target single spin asymmetries in the semi-inclusive 3He(e,e′π±)X reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab using a 5.9 GeV electron beam, covers a range of 0.1622. The Collins and Sivers moments were extracted from the azimuthal angular dependence of the measured asymmetries. The π± Collins moments for 3He are consistent with zero, except for the π+ moment at x=0.35, which deviates from zero by 2.3σ. While the π- Sivers moments are consistent with zero, the π+ Sivers moments favor negative values. The neutron results were extracted using the nucleon effective polarization and measured cross section ratios of proton to 3He, and are largely consistent with the predictions of phenomenological fits and quark model calculations.

DOI
10.1103/PhysRevLett.107.072003
Version
Publisher's PDF
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Comments

© 2011 American Physical Society. The original publication is available at http://link.aps.org/doi/10.1103/PhysRevLett.107.072003

Original Citation

Phys. Rev. Lett. 107, 072003 (2011)

Citation Information
X. Qian, Timothy Holmstrom and. "Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized (3)He Target at Q(2)=1.4–2.7  GeV(2)" Physical Review Letters Vol. 107 Iss. 7 (2011) p. 072003-1 - 072003-6
Available at: http://works.bepress.com/timothy_holmstrom/9/