Single spin asymmetries of inclusive hadrons produced in electron scattering from a transversely polarized [superscript 3]He target
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Allada-2014-Single spin asymmetries.pdf
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Author(s)
Allada, Kalyan C.
Bertozzi, William
Gilad, Shalev
Huang, J.
Moffit, Bryan J.
Puckett, A. J. R.
Sulkosky, V.
Zhan, X.
Date Issued
April 2014
Journal
Physical Review C
Publisher
American Physical Society
Citation
Allada, K., Y. X. Zhao, K. Aniol, J. R. M. Annand, T. Averett, F. Benmokhtar, W. Bertozzi, et al. “Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized [superscript 3]He Target.” Phys. Rev. C 89, no. 4 (April 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We report the first measurement of target single spin asymmetries (A[subscript N]) in the inclusive hadron production reaction, e + [superscript 3]He[superscript ↑] → h + X, using a transversely polarized [superscript 3]He target. The experiment was conducted at Jefferson Lab in Hall A using a 5.9-GeV electron beam. Three types of hadrons (π[superscript ±], K[superscript ±], and proton) were detected in the transverse hadron momentum range 0.54 < p[subscript T] < 0.74 GeV/c. The range of x[subscript F] for pions was −0.29 < x[subscript F] < −0.23 and for kaons was −0.25 < x[subscript F] < −0.18. The observed asymmetry strongly depends on the type of hadron. A positive asymmetry is observed for π[superscript +] and K[superscript +]. A negative asymmetry is observed for π[superscript −]. The magnitudes of the asymmetries follow ∣∣A[superscript π−] |<| A[superscript π+] |<| A[superscript K+]∣∣. The K[superscript −] and proton asymmetries are consistent with zero within the experimental uncertainties. The π[superscript +] and π[superscript −] asymmetries measured for the [superscript 3]He target and extracted for neutrons are opposite in sign with a small increase observed as a function of p[subscript T].
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.89.042201
