Eur. Phys. J. A 24, s2.29-s2.32 (2005)
DOI: 10.1140/epjad/s2005-04-005-3

Single spin asymmetries in elastic electron-nucleon scattering

B. Pasquini^{1, 2} and M. Vanderhaeghen<sup>3, 4

1</sup>  Dipartimento di Fisica Nucleare e Teorica, Università degli Studi di Pavia and INFN, Sezione di Pavia, Pavia, Italy
²  ECT, Villazzano (Trento), Italy
³  Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
⁴  Department of Physics, College of William and Mary, Williamsburg, VA 23187, USA

(Received 15 October 2004 / Published online 08 February 2005)

Abstract

We discuss the target and beam normal spin asymmetries in elastic electron-nucleon scattering which depend on the imaginary part of two-photon exchange processes between electron and nucleon. In particular, we estimate these transverse spin asymmetries for beam energies below 2 GeV, where the two-photon exchange process is dominated by the resonance contribution to the doubly virtual Compton scattering tensor of the nucleon.

PACS: 25.30.Bf Elastic electron scattering - 25.30.Rw Electroproduction reactions

© Società Italiana di Fisica, Springer-Verlag 2005