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We study beam-transverse and normal single-spin asymmetry for electron-protoninelastic scattering in the resonance region for the case where a pion isobserved in the final state. There is no beam single-spin asymmetry if theobserved particle has single-photon exchange as its only interaction, but thisis naturally circumvented when one observes a strongly interacting final stateparticle. The asymmetries are not large as there is an electron mass divided bymomentum transfer suppression. We present results for the cases where the finalelectron and a pion are both observed, with asymmetries of order tens of ppm,and where only a final pion is observed, with asymmetries of order one ppm.

Electron Beam Single-Spin Asymmetries in the Resonance Region with Final Hadrons Observed