We report the first measurement of target single spin asymmetries (AN) in the inclusive hadron production reaction, e+3He↑→h+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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Allada, K.; Zhao, Y. X.; Aniol, K.; Annand, J. R. M.; Averett, T.; Benmokhtar, F.; Bertozzi, W.; Bradshaw, P. C.; Bosted, P.; Camsonne, A.; Dutta, C.; Kolarkar, Ameya Suresh; and Korsch, Wolfgang, "Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized 3He Target" (2014). Physics and Astronomy Faculty Publications. 127.