Transversity Signals in Two-Hadron Production at COMPASS

New results on single spin asymmetries of identified charged pion and kaon pairs produced in deep-inelastic scattering of muons on a transversely polarized 6 LiD target are presented. The data were taken in the years 2003 and 2004 with the COMPASS spectrometer at CERN with a 160 GeV muon beam from the CERN SPS accelerator. The asymmetries can be interpreted in the context of transversity as a convolution of the chiral-odd interference fragmentation function H 1 with the transverse spin distribution of quarks ∆T q(x). The measured azimuthal target spin asymmetries on the deuteron are compatible with zero within a small statistical error of about 1%