  COMPASS is a fixed target experiment at CERN investigating the spin structure
of the nucleon and performing hadron spectroscopy. The transverse spin
structure of the nucleon is studied in semi-inclusive deep-inelastic scattering
of 160 GeV/c muons off a transversely polarized proton or deuteron target. In
2002-2005, a transversely polarized 6LiD, and in 2007 a transversely polarized
NH3 target were used. To get access to the transversity distribution, different
single-spin asymmetries have been measured: the Collins asymmetry, the
hadron-pair asymmetry and the transverse lambda polarization. In addition,
transverse momentum effects of quarks have been studied by the Sivers effect.
New results for the Collins and the Sivers asymmetries on the proton for
identified pions and kaons and for the two hadron interference asymmetry will
be presented.
