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Beam-Target Double-Spin Asymmetry A_(LT) in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized ^3He Target at 1.4<Q^2 < 2.7 GeV^2

Huang, J. and Qian, X. (2012) Beam-Target Double-Spin Asymmetry A_(LT) in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized ^3He Target at 1.4<Q^2 < 2.7 GeV^2. Physical Review Letters, 108 (5). Art. No. 052001. ISSN 0031-9007. doi:10.1103/PhysRevLett.108.052001. https://resolver.caltech.edu/CaltechAUTHORS:20120306-085115817

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Abstract

We report the first measurement of the double-spin asymmetry A_(LT) for charged pion electroproduction in semi-inclusive deep-inelastic electron scattering on a transversely polarized ^3He target. The kinematics focused on the valence quark region, 0.16<x<0.35 with 1.4<Q^2<2.7  GeV^2. The corresponding neutron A_(LT) asymmetries were extracted from the measured ^3He asymmetries and proton over ^3He cross section ratios using the effective polarization approximation. These new data probe the transverse momentum dependent parton distribution function g_(1T)^q and therefore provide access to quark spin-orbit correlations. Our results indicate a positive azimuthal asymmetry for π^- production on ^3He and the neutron, while our π^+ asymmetries are consistent with zero.


Item Type:Article
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http://dx.doi.org/10.1103/PhysRevLett.108.052001DOIUNSPECIFIED
http://link.aps.org/doi/10.1103/PhysRevLett.108.052001PublisherUNSPECIFIED
http://prl.aps.org/abstract/PRL/v108/i5/e052001PublisherUNSPECIFIED
Additional Information:© 2012 American Physical Society. Received 8 August 2011; published 30 January 2012. We acknowledge the outstanding support of the JLab Hall A technical staff and Accelerator Division in accomplishing this experiment. This work was supported in part by the U.S. National Science Foundation, and by U.S. DOE contract DE-AC05-06OR23177, under which Jefferson Science Associates, LLC operates the Thomas Jefferson National Accelerator Facility.
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Funding AgencyGrant Number
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Department of Energy (DOE)DE-AC05-06OR23177
Issue or Number:5
Classification Code:PACS: 14.20.Dh, 25.30.Fj, 25.30.Rw, 24.85.+p
DOI:10.1103/PhysRevLett.108.052001
Record Number:CaltechAUTHORS:20120306-085115817
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20120306-085115817
Official Citation:Beam-Target Double-Spin Asymmetry ALT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized 3He Target at 1.4<Q2<2.7  GeV2 J. Huang et al. (The Jefferson Lab Hall A Collaboration) Published 30 January 2012 (6 pages) 052001
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29585
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:13 Mar 2012 18:05
Last Modified:09 Nov 2021 17:08

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