Transverse spin asymmetries in p ↑ p → π± + X and lp ↑ → l′ + π± + X Original Research Article

While transverse spin effects have been studied in hadronic interactions since a few decades, investigations with leptonic probes have started very recently. Azimuthal distributions of hadrons (mainly π+ and π−) produced in DIS off transversely polarized targets (proton and deuteron) are studied for the first time in SMC. According to Collins (‘Collins effect’), the azimuthal distribution of the leading hadron might exhibit an asymmetry which originates from the transverse polarization of the final quark.