Spin transfer coefficient DΛLL to Λ hyperon in semi-inclusive DIS at HERMES

Three components of the spin transfer coefficient from the longitudinally polarized electron/positron beam to the ? or hyperon have been measured in the HERMES experiment. Kinematical dependencies of the spin-transfer have been studied. Averaged over ? kinematics, longitudinal component of the spin transfer D?LL (along the virtual photon direction) to the ? hyperon is found to be D?LL = 0.19 ? 0.04stat ? 0.02syst.