Measurement of Transverse Spin Effects at COMPASS

Abstract

By measuring transverse single spin asymmetries one has access to the transversity distribution function ${\Delta }_{T}q(x)$ and the transverse momentum dependent Sivers function $q_0^T(x,{\vec{k}}_T)$. New measurements from identified hadrons and hadron pairs, produced in deep inelastic scattering of a transversely polarized ${}^{6}LiD$ target are presented. The data were taken in 2003 and 2004 by the COMPASS collaboration using the muon beam of the CERN SPS at 160 GeV/c, resulting in small asymmetries.

4 pages, 7 figures, in proceedings for 'Rencontres de Moriond 2007, QCD and Hadronic interactions'