Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized 3He Target at Q2=1.4–2.7 GeV2
Author(s)
Huang, J.; Bertozzi, William; Gilad, Shalev; Moffit, Bryan J.; Puckett, Andrew James R.; Sulkosky, Vincent; Zhan, X.; ... Show more Show less![Thumbnail](/bitstream/handle/1721.1/67314/Qian-2011-Single%20Spin%20Asymmetries%20in%20Charged%20Pion.pdf.jpg?sequence=6&isAllowed=y)
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We report the first measurement of target single spin asymmetries in the semi-inclusive [superscript 3]He(e,e[superscript ′]π[superscript ±])X reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab using a 5.9 GeV electron beam, covers a range of 0.16<x<0.35 with 1.4<Q[superscript 2]<2.7 GeV[superscript 2]. The Collins and Sivers moments were extracted from the azimuthal angular dependence of the measured asymmetries. The π[superscript ±] Collins moments for [superscript 3]He are consistent with zero, except for the π[superscript +] moment at x=0.35, which deviates from zero by 2.3σ. While the π[superscript -] Sivers moments are consistent with zero, the π[superscript +] Sivers moments favor negative values. The neutron results were extracted using the nucleon effective polarization and measured cross section ratios of proton to [superscript 3]He, and are largely consistent with the predictions of phenomenological fits and quark model calculations.
Date issued
2011-08Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Koch Institute for Integrative Cancer Research at MITJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Qian, X. et al. “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 107 (2011): n. pag. Web. 30 Nov. 2011. © 2011 American Physical Society
Version: Final published version
ISSN
0031-9007