Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized [superscript 3]He target
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PhysRevC.90.055209.pdf
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Author(s)
Zhang, Y.
Qian, X.
Dutta, C.
Huang, J.
Katich, J.
Wang, Y.
Aniol, K.
Annand, J. R. M.
Averett, T.
Benmokhtar, F.
Date Issued
November 2014
Journal
Physical Review C
Publisher
American Physical Society
Citation
Zhang, Y., et al. "Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized [superscript 3]He target." Phys. Rev. C 90, 055209 (November 2014). © 2014 American Physical Society
Version
Final published version
Abstract
An experiment to measure single-spin asymmetries of semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized [superscript 3]He target was performed at Jefferson Laboratory in the kinematic region of 0.16 < x < 0.35 and 1.4 < Q[superscript 2] < 2.7 GeV[superscript 2]. Pretzelosity asymmetries on [superscript 3]He, which are expressed as the convolution of the h[⊥ over 1T] transverse-momentum-dependent distribution functions and the Collins fragmentation functions in the leading order, were measured for the first time. Under the effective polarization approximation, we extracted the corresponding neutron asymmetries from the measured [superscript 3]He asymmetries and cross-section ratios between the proton and [superscript 3]He. Our results show that both π[superscript ±] on [superscript 3]He and on neutron pretzelosity asymmetries are consistent with zero within experimental uncertainties.
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/PhysRevC.90.055209
