Transverse spin and momentum effects in the COMPASS experiment

The study of the spin structure of the nucleon is part of the scientific program of COMPASS, a fixed target experiment at the CERN SPS. COMPASS investigates transverse spin and transverse momentum effects by studying the azimuthal distributions of the hadrons produced in deep inelastic scattering of naturally polarized 160 GeV/c muons on transversely polarized target. The results obtained using a $^{6}$LiD from the data collected in 2002-2004, and new results obtained using a NH$_{3}$ target, from the data collected in 2007, are presented.