Transversity signals in two hadron correlation at COMPASS

Over the last couple of years, transverse spin physics has gained increasing attention as well from theoretical as from experimental side. To fully specify the quark structure of the nucleon at the twist-two level, the transverse spin distribution function ΔTq(x) has to be taken into account. The measurement of two hadron production introducing the chiral odd interference fragmentation function H1 is considered a new probe of the transverse spin distribution function.COMPASS is a fixed target experiment on the SPS M2 beamline at CERN. Its target can be polarised both longitudinally and transversally with respect to the polarised 160 GeV/c μ+ beam. In 2002, 2003, and 2004, 20% of the beam-time was spent in the transverse configuration on a 6LiD target, allowing the measurement of transversity effects on a deuterium target. The results of the analysis of two hadron production based on the full statistics on the deuterium target are reported