Transverse single spin asymmetry in elastic electron-proton scattering M. Gorchtein, P.A.M. Guichon and M. Vanderhaeghen Eur. Phys. J. A, 24 Supplement 2 (2005) s2.33-s2.34 Published online: 08 February 2005 DOI: 10.1140/epjad/s2005-04-006-2