We report the first measurement of target single spin asymmetries (AN) in the inclusive hadron production reaction, e+3Heh+X, using a transversely polarized 3He target. The experiment was conducted at Jefferson Lab in Hall A using a 5.9-GeV electron beam. Three types of hadrons (π±, K±, and proton) were detected in the transverse hadron momentum range 0.54 <pT< 0.74 GeV/c. The range of xF for pions was −0.29 <xF< −0.23 and for kaons was −0.25 <xF< −0.18. The observed asymmetry strongly depends on the type of hadron. A positive asymmetry is observed for π+ and K+. A negative asymmetry is observed for π. The magnitudes of the asymmetries follow ∣∣Aπ|<|Aπ+|<|AK+∣∣. The K and proton asymmetries are consistent with zero within the experimental uncertainties. The π+ and π asymmetries measured for the 3He target and extracted for neutrons are opposite in sign with a small increase observed as a function of pT.

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Published in Physical Review C: Nuclear Physics, v. 89, article 042201(R), p. 1-6.

©2014 American Physical Society

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Due to the large number of authors involved, only the first 10 and the ones affiliated with the University of Kentucky are listed in the author section above. The authors of this article are collectively known as Jefferson Lab Hall A Collaboration.

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