Longitudinal target polarization dependence of anti-Lambda polarization and polarized strangeness PDFs

The longitudinal polarization of anti-Lambda produced in the currant fragmentation region of polarized lepton DIS off polarized and unpolarized target is described both in the simple formalism with factorized fragmentation functions as well as within intrinsic strangeness model using string fragmentation implemented into event generator LEPTO. It is demonstrated that the the measurement of anti-Lambda polarization and its dependence on the target polarization can serve as a filter for (un)polarized anti-strangeness distribution function of nucleon.