Journal
PHYSICS LETTERS B
Volume 704, Issue 5, Pages 397-402Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2011.09.044
Keywords
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Funding
- National Science Foundation
- Italian Istituto Nazionale di Fisica Nucleare
- French Centre National de la Recherche Scientifique
- French Commissariat a l'Energie Atomique
- National Research Foundation of Korea
- UK Science and Technology Facilities Council (STFC)
- EU [227431]
- Physics Department at Moscow State University
- Chile, FONDECYT [1100872]
- United States Department of Energy [DE-AC05-06OR23177]
- STFC [ST/G008582/1, ST/J000175/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G008582/1, ST/J000175/1] Funding Source: researchfish
- Division Of Physics
- Direct For Mathematical & Physical Scien [965606] Funding Source: National Science Foundation
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We present studies of single-spin asymmetries for neutral pion electroproduction in semi-inclusive deep-inelastic scattering of 5.776 GeV polarized electrons from an unpolarized hydrogen target, using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. A substantial sin phi(h) amplitude has been measured in the distribution of the cross section asymmetry as a function of the azimuthal angle phi(h) of the produced neutral pion. The dependence of this amplitude on Bjorken x and on the pion transverse momentum is extracted with significantly higher precision than previous data and is compared to model calculations. (C) 2011 Elsevier B.V. All rights reserved.
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