The Polarization of Anti-Lambda Produced in $\sqrt{s}$=200GeV Longitudinal Polarized Proton-Proton Collision at PHENIX

The polarization of anti-lambdas produced in pp collisions as a function of rapidity is expected to be sensitive to the polarization of the anti-strange sea of the nucleon and also sensitive to the polarized fragmentation functions. ~ Substantially non-zero and rather large spin transfers have been observed by the FNAL E704 and E665 experiments.~ But the polarization reactions can be studied for the first time in longitudinal polarized pp scattering at higher collider energies at RHIC. ~ In this presentation, we discuss the anti-lambda polarization and its dependence on pseudo-rapidity in $\sqrt{s}$=200GeV polarized proton-proton collisions at RHIC/PHENIX, using 0.25 pb-1 of data collected collected in 2003 with beam polarizations 32{\%}. The anti-lambda candidates are reconstructed at mid-rapidity via its weak decay channel `anti-lambda-$>$bar(p)+pion(+)'; and the charged particles are measured with the PHENIX central arms.