Measurement of Single- and Double-Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target
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Avakian-2010-Measurement of Singl.pdf
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Author(s)
Suleiman, R.
Date Issued
December 2010
Journal
Physical review letters
Publisher
American Physical Society
Citation
Avakian, H. et al. “Measurement of Single- and Double-Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target.” Physical Review Letters 105.26 (2010) : n. pag. © 2010 The American Physical Society
Version
Final published version
Abstract
We report the first measurement of the transverse momentum dependence of double-spin asymmetries
in semi-inclusive production of pions in deep-inelastic scattering off the longitudinally polarized proton.
Data have been obtained using a polarized electron beam of 5.7 GeV with the CLAS detector at the
Jefferson Lab (JLab). Modulations of single spin asymmetries over the azimuthal angle between lepton
scattering and hadron production planes [phi] have been measured over a wide kinematic range in Bjorken x
and virtual photon squared four-momentum Q2 [Q superscript 2]. A significant nonzero sin2 [phi] single spin asymmetry was
observed for the first time indicating strong spin-orbit correlations for transversely polarized quarks in the
longitudinally polarized proton.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.262002
