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We report the first measurement of target single spin asymmetries in thesemi-inclusive $^3{He}(e,e'\pi^\pm)X$ reaction on a transversely polarizedtarget. The experiment, conducted at Jefferson Lab using a 5.9 GeV electronbeam, covers a range of 0.14 $< x <$ 0.34 with 1.3 $<Q^2<$ 2.7 GeV$^2$. TheCollins and Sivers moments were extracted from the azimuthal angular dependenceof the measured asymmetries. The extracted $\pi^\pm$ Collins moments for $^3$Heare consistent with zero, except for the $\pi^+$ moment at $x=0.34$, whichdeviates from zero by 2.3$\sigma$. While the $\pi^-$ Sivers moments areconsistent with zero, the $\pi^+$ Sivers moments favor negative values. Theneutron results were extracted using the nucleon effective polarization and themeasured cross section ratio of proton to $^3$He, and are largely consistentwith the predictions of phenomenological fits and quark model calculations.

Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized $^3$He Target